Search

BackgroundTrichoderma reesei is an organism extensively used in the bioethanol industry, owing to its capability to produce enzymes capable of breaking down holocellulose into simple sugars. The uptake of carbohydrates generated from cellulose breakdown is crucial to induce the signaling cascade that triggers cellulase production. However, the sugar transporters involved in this process in T. reesei remain poorly identified and characterized.ResultsTo address this gap, this study used temporal membrane proteomics analysis to identify five known and nine putative sugar transporters that may be involved in cellulose degradation by T. reesei. Docking analysis pointed out potential ligands for the putative sugar transporter Tr44175. Further functional validation of this transporter was carried out in Saccharomyces cerevisiae. The results showed that Tr44175 transports a variety of sugar molecules, including cellobiose, cellotriose, cellotetraose, and sophorose.ConclusionThis study has unveiled a transporter Tr44175 capable of transporting cellobiose, cellotriose, cellotetraose, and sophorose. Our study represents the first inventory of T. reesei sugar transportome once exposed to cellulose, offering promising potential targets for strain engineering in the context of bioethanol production.

Apple replant disease (ARD) is primarily caused by biotic factors that seriously inhibits the development of apple industry. Therefore, the use of biological control measures to inhibit the main pathogens (such as Fusarium spp.) that cause ARD is of great significance to the sustainable development of the apple industry. Trichoderma virens 6PS-2, which exhibited antagonism toward a variety of pathogens, was screened from the rhizosphere soils of healthy apple trees (Malus robusta) in different replanted orchards in the Yantai and Zibo Cities, Shandong Province, China. Its fermentation extract inhibited the growth of pathogenic Fusarium proliferatum f. sp. Malus domestica MR5, which was proportional to the concentration. These substances also increased the hairy root volume and growth of Arabidopsis thaliana lateral roots. The phenotype of Malus hupehensis seedlings and microbial community structure in rhizosphere soils in greenhouse experiment using Highthroughput sequencing were analyzed, and the field experiment with grafted apple trees were used for further verification. Compared with the application of potato dextrose broth (PDB) medium, application of 6PS-2 spore suspension directly to replanted soils could improve the growth of M. hupehensis seedlings as well as the elongation of grafted apple trees. Concomitant decreases in the gene copy number of Fusarium and increases in the culturable bacteria/fungi were also observed in the greenhouse and field experiments. The abundance of Trichoderma, Bacillus, and Streptomyces increased significantly, but that of Fusarium, Pseudarthrobacter, and Humicola decreased. The content of esters, phenols, furans, and amino acids in root exudates of M. hupehensis seedlings increased, which significantly inhibited the multiplication of Fusarium, but was positively correlated with Bacillus and Trichoderma. In summary, T. virens 6PS-2 not only directly inhibits the activity of pathogenic Fusarium but also secrets secondary metabolites with antifungal and growth-promoting potential. In addition, 6PS-2 spore suspension can also promote the growth of plants to a certain extent, and change the soil microbial community structure of rhizosphere soils. It is believed that T. virens 6PS- 2 has the potential for the alleviation of apple replant disease (ARD) in China. [ABSTRACT FROM AUTHOR]

Green mould contamination causes a significant challenge to mushroom growers in Malaysia leading to reduced yields and economic losses in the widely cultivated and marketed edible grey oyster mushroom, Pleurotus pulmanorius. This study aimed to identify the causal agents of green mould contaminants and determine the critical points in the cultivation process in the farm that contribute to green mould contamination. Samples of mushroom substrate (sawdust), spawn substrate (corn), environmental sources and tools were collected at different stages of mushroom cultivation. As results, the causal agents of green mould contamination were identified as Trichoderma pleuroti , T. harzianum and T. ghanese. Prior to steam pasteurisation and after steam pasteurisation, the spawn substrate and mushroom substrate were found to be free of Trichoderma. However, Trichoderma was detected in water, air within the production house and on cleaning tools. This findings suggests that water could serve as the source of green mould introduction in mushroom farms, while cultivation practices such as watering and scratching during the harvesting cycle may contribute to adverse green mould. Understanding these critical points and causal agents provides information to mitigate the green mould contamination throughout the grey oyster mushroom cultivation process. [Display omitted] • Pleurotus mushroom cultivation in Malaysia faces contamination by green mould. • T. pleuroti is the main causal agent followed by T. harzianum and T. ghanense. • Water is the primary source followed by air inside the production house. • Watering is one of critical points in mushroom cultivation. [ABSTRACT FROM AUTHOR]

Bioformulations with Trichoderma strains offer cost-effective and sustainable options for integrated disease management and plant nutrition. Therefore, this study aimed to selected isolates of Trichoderma with antagonistic and plant growth-promoting potential, specifically in the early development stage of soybean seedlings. Trichoderma isolated from the soybean rhizosphere were screened to assess their antagonistic activity against three phytopathogens; as well as their capability for indole-3-acetic acid (IAA) synthesis and phosphate solubilization. Three promising were further examined for their tolerance to various in vitro conditions and agrochemicals. Experiments were performed to assess the effect of single inoculation and co-inoculation of strains on the growth and biochemical responses during early soybean development. Nine isolates showed effective antagonism against phytopathogens. Among them, T. reesei GT-31 and T. longibrachiatum GT-32 showed the highest IAA production, with 175.8 and 119.6 μg/mL, respectively, while the T. viride GT-8 showed the highest phosphate solubilization activity after 10 days of growth (285.6 μg P/mL). These strains displayed robust growth under various conditions and agrochemical treatments. The co-inoculation of three strains resulted in even higher dry shoot and root weights, increasing by 50.3% and 48.8%, respectively, compared to non-inoculated seedlings. Co-inoculated plants also exhibited elevated chlorophyll (31.9%), carotenoids (24.9%), flavonoids (13.2%), and phenolic compounds (42.3%). The results suggest that employing the three strains with beneficial mechanisms for plants could significantly enhance the growth and early development of soybean seedlings. Overall, these findings highlight the potential of these novel Trichoderma strains to enhance plant growth and offer benefits in soybean crops, providing a sustainable strategy for agriculture. [ABSTRACT FROM AUTHOR]

Ganoderma, a well-known genus in the Ganodermataceae family, has caused the extinction of several tree species due to its pathogenicity. This study explored the pathogenic effect of a newly identified Ganoderma species on trees and its competitive efficiency against Trichoderma species. Ganoderma camelum sp. nov. is characterized by small sessile basidiomata and a velvety, soft, camelbrown pileus. Phylogenetic analysis and ITS rDNA sequences indicated that the species were Trichoderma and Ganoderma camelum. Both fungal species competed antagonistically by secreting laccase. The laccase activity of G. camelum, with a value of 8.3 ± 4.0 U/mL, demonstrated the highest competitive activity against Trichoderma species. The laccase produced by T. atroviride (2.62 U/mL) was most effective in countering the pathogenic action of the novel G. camelum. The molecular weights of laccase were determined using SDSPAGE (62.0 kDa for G. camelum and 57.0 kDa for T. atroviride). Due to the white rot induced by this Ganoderma species in the host tree, G. camelum showed the highest percentage inhibition of radial growth (76.3%) compared to T. atroviride (28.7%). This study aimed to evaluate the competitive antagonistic activity of Ganoderma and Trichoderma on malt extract agar media in the context of white rot disease in the host tree. This study concluded that the laccase from G. camelum caused weight loss in rubber wood blocks through laccase action, indicating tissue injury in the host species. Therefore, it was also concluded that G. camelum was more effective in pathogenic action of the host and resisted the biological action of T. atroviride. In principal components analysis (PCA), all the species associated with laccase exhibited a very strong influence on the variability of the system. The PIRG rate (percentage inhibition of radial growth) was strongly and positively correlated with laccase activity. [ABSTRACT FROM AUTHOR]

Exposure to pesticides may affect the survival and normal physiological functions of the honey bee (Apis mellifera L.). The fungicide propiconazole (PRO) and the biofungicide Trichoderma are widely used in agroecosystems, and their effects on the physiology of the honey bee have been largely neglected in risk assessment procedures. We investigated the mortality and variations in physiological biomarkers of honey bee larvae and newly emerged workers exposed to PRO and Trichoderma. Exceeding the field-recommended concentrations of Trichoderma decreased the survival of newly emerged bee workers significantly through oral exposure. PRO, however, showed no significant lethal effects. Contact or oral exposure to field-realistic concentrations of PRO and Trichoderma profoundly altered the activities of detoxification, antioxidative, and digestive enzymes along with energy reserve concentrations of honey bee larvae and adult workers. Integrated biological index (IBRv2) values suggested potential risks of PRO and Trichoderma to honey bees by impairing the physiological status of larvae and newly emerged workers. [ABSTRACT FROM AUTHOR]

AbstractChickpea wilt, caused by a complex of soilborne fungi (Fusarium spp. Macrophomina phaseolina, Rhizoctonia solani, Sclerotium rolfsii, and Sclerotinia sclerotiorum), is the most important disease of chickpeas (Cicer arietinum) in Mexico. The aims of this study were to characterize Trichoderma isolates using a combination of phenotypic and molecular approaches and to evaluate their antagonistic activity against soilborne fungi associated with chickpea wilt. A total of 30 Trichoderma isolates were obtained from rhizospheric soil samples collected from chickpea fields in different locations of Sinaloa, Mexico. Dual confrontation assays showed the potential antagonistic effect of Trichoderma isolates against F. languescens, M. phaseolina, R. solani, S. rolfsii, and S. sclerotiorum. Five Trichoderma isolates (FAVF335, FAVF340, FAVF345, FAVF349, and FAVF351) exhibited mycelial growth inhibition of the five pathogens that ranged from 56 to 71%. These isolates were characterized using cultural, morphological, and molecular studies and tested in vivo for their ability to control soilborne pathogens in two chickpea cultivars (Blanco Sinaloa-92 and P2245) under greenhouse conditions. Phylogenetic analysis based on a combined ITS, EF-1α, and rpb2 sequence dataset identified T. afroharzianum (FAVF345, FAVF349, and FAVF351) and T. longibrachiatum (FAVF335 and FAVF340). Coating of chickpea seeds with T. longibrachiatum (FAVF335 and FAVF340) significantly reduced the disease severity and improved the plant growth-promoting attributes. [ABSTRACT FROM AUTHOR]

The document from Frontiers in Veterinary Science presents morphological characteristics of feces from two bird species, A. rufipectus and L. nycthemera, along with a sampling table detailing the longitude, latitude, and time of each sample collection. It also includes alpha diversity indices for each sample and Blastn alignments with nucleotide sequence accession numbers for various fungal species. The research provides valuable insights into the microbial diversity of bird feces, contributing to our understanding of avian health and ecology. [Extracted from the article]

The goal was to investigate biochars' potential as carrier for commercial Trichoderma-based biopesticides, facilitating their application in soil or growing media. Thirty-five biochars produced from various feedstocks and pyrolysis temperatures were chemically characterized. Incubation and cold storage tests using a commercial Trichoderma-based biopesticide were done. Properties leading to good Trichoderma carrier capacity (TCC) are wood-based feedstocks and low pyrolysis temperatures (p < 0.001). Multivariate linear regression showed that TCC = exp (23.0 (± 2.21)–1.03 (± 0.25) *pH-H2O–0.94 (± 0.32) *inorganic carbon–0.10 (± 0.02) *total phosphorus + 0.0005 (± 0.0002) *water-soluble carbon). [ABSTRACT FROM AUTHOR]

This study investigated the antagonistic activity of Trichoderma asperellum against chickpea Fusarium wilt through in vitro and in vivo experiments. The dual culture test showed that Trichoderma had a significant inhibitory effect on the growth of the tested Fusarium isolates, with an inhibition rate ranging from 71.33% to 80.66%. The volatile and non-volatile metabolites produced by Trichoderma also showed antagonistic effects, with a growth inhibition rate ranging from 47.33% to 51.33% and a colonization rate ranging from 60% to 67%. In vivo experiments demonstrated that treating chickpea seeds with Trichoderma asperellum 48 h after inoculation with Fusarium significantly enhanced chickpea growth compared to seeds inoculated with Fusarium alone. Arial part length enhancement ranged between 69.3% and 92,19% while root length increased by 61,9% and 127%, this implied a significant improvement in biomass. These findings highlight Trichoderma's potential in controlling chickpea Fusarium wilt and enhancing plant growth, making it an environmentally friendly method in sustainable agriculture and crop protection. [ABSTRACT FROM AUTHOR]

Fungi in the genus Trichoderma are widespread in the environment, mainly in soils. They are used in agriculture because of their mycoparasitic potential; Trichoderma have the ability to increase plant health and provide protection against phytopathogens, making them desirable plant symbionts. We isolated, identified, and characterized Trichoderma from different regions of Saudi Arabia and evaluated the ability of Trichoderma to promote plant growth. Morphological and molecular characterization, along with phylogenetic studies, were utilized to differentiate between Trichoderma species isolated from soil samples in the Abha and Riyadh regions, Saudi Arabia. Then, plant growth-promoting traits of the isolated Trichoderma species were assessed. Eight Trichoderma isolates were characterized via morphological and molecular analysis; six (Trichoderma koningiopsis, Trichoderma lixii, Trichoderma koningii, Trichoderma harzianum, Trichoderma brevicompactum, and Trichoderma velutinum) were from Abha and two (T. lixii and T. harzianum) were from Riyadh. The isolated Trichoderma strains belonged to three different clades (Clade 1: Harzianum, Clade 2: Brevicompactum, and Clade 3: Viride). The Trichoderma isolates varied in plant growth-promoting traits. Seeds treated with most isolates exhibited a high percentage of germination, except seeds treated with the T3-T. koningii isolate. 100% germination was reported for seeds treated with the T4-T. harzianum and T6-T. brevicompactum isolates, while seeds treated with the T1-T. koniniopsis and T5-T. lixii isolates showed 91.1% and 90.9% germination, respectively. Seeds treated with the T8-T. velutinum, T2-T. lixii, and T7-T. harzianum isolates had germination rates of 84.1%, 82.2%, and 72.7%, respectively. The Trichoderma isolate T5-T. lixii stimulated tomato plant growth the most, followed by T7-T. harzianum, T8-T. velutinum, T4-T. harzianum, T1-T. koniniopsis, T2-T. lixii, and T6-T. brevicompactum; the least effective was T3-T. koningii. A maximum fresh weight of 669.33 mg was observed for the T5-T. lixii-treated plants. The Abha region had a higher diversity of Trichoderma species than the Riyadh region, and most isolated Trichoderma spp. promoted tomato growth. [ABSTRACT FROM AUTHOR]

The use of beneficial microbes is hitherto known and constantly increasing in agriculture due to their positive impact on crop growth and yield, and their minimal negative impact on the environment. The objective of this study was to evaluate the impact of eight Trichoderma strains of diverse origin on crop growth and yield of onion under field conditions. The identity of the strains used in the current study was confirmed by ITS and Tef1 gene sequencing. Field experiments were conducted in the Rabi season for 2 years (2020-21, and 2022-23) to evaluate the effect of the application of eight different Trichoderma strains that were applied individually and separately as eight different treatments (T1-T8) in experimental plots. In the plant growth promotion assay conducted in vitro, all strains showed the ability to produce IAA (indole-3-acetic acid), with levels ranging from 23.52 µg/mL (T6) to 45.54 μg/mL (T3). Our results revealed that Trichoderma treated experimental plots displayed better growth indices (plant height, pseudostem diameter), RWC (Relative water content), leaf chlorophyll content, and yield-attributing features like biomass (bulb and root dry mass), bulb diameter, and harvested bulb yield compared to the untreated control plants. In terms of yield, the T2 strain exhibited the highest bulb yield consistently for both the years (2020-21 and 2022-23) followed by T3 being statistically at par with T5. Among all the evaluated Trichoderma strains, the strain T2 (OGRDT2) and T3 (GRDT1), taxonomically identified as Trichoderma longibrachiatum, registered bulb yield of 32.24 t/ha and 30.76 t/ha, respectively while T5 (GRDT3), identified as Trichoderma asperellum, registered 30.55 t/ha average yield for 2 years compared to 24.08 t/ha average yield recorded for untreated control plants with an increase of 34, 28 and 27%, respectively. Based on our findings, it is concluded that the T. longibrachiatum strains OGRDT2 (T2) and GRDT1 (T3), T. asperellum strain GRDT3 (T5) are the best inducers of the onion crop growth and yield in the Rabi season and would be explored further for its commercial application in onion farming. [ABSTRACT FROM AUTHOR]

In order to reduce the actual impact of a saline–alkali environment on maize production in semi-arid areas, it is particularly important to use the combined fertilization strategy of Trichoderma microbial fertilizer and nitrogen fertilizer. The purpose of this study was to investigate the effects of different concentrations of nitrogen fertilizer combined with Trichoderma on improving the structural characteristics and ecological functions of maize rhizosphere microbial community in semi-arid saline–alkali soil. Through the microbiome analysis of maize rhizosphere soil samples with 60 kg N·ha−1 (N1) and 300 kg N·ha−1 (N2) nitrogen fertilizer combined with Trichoderma (T1) and without Trichoderma (T0), we found that the combination of Trichoderma and different concentrations of nitrogen fertilizer significantly affected the structure of bacterial and fungal communities. The results of this study showed that the combination of Trichoderma and low-concentration nitrogen fertilizer (N1T1) could improve soil nutritional status and enhance its productivity potential, revealing the relationship between beneficial and harmful fungal genera, microbial diversity and abundance, and crop biomass, which is of great significance for improving agricultural production efficiency and sustainable development. [ABSTRACT FROM AUTHOR]

Summary: All plant populations fluctuate in time. Apart from the dynamics imposed by external forces such as climate, these fluctuations can be driven by endogenous processes taking place within the community. In this study, we aimed to identify potential role of soil‐borne microbial communities in driving endogenous fluctuations of plant populations.We combined a unique, 35‐yr long abundance data of 11 common plant species from a species‐rich mountain meadow with development of their soil microbiome (pathogenic fungi, arbuscular mycorrhizal fungi and oomycetes) observed during 4 yr of experimental cultivation in monocultures.Plant species which abundance fluctuated highly in the field (particularly legumes) accumulated plant pathogens in their soil mycobiome. We also identified increasing proportion of mycoparasitic fungi under highly fluctuating legume species, which may indicate an adaptation of these species to mitigate the detrimental effects of pathogens.Our study documented that long‐term fluctuations in the abundance of plant species in grassland communities can be explained by the accumulation of plant pathogens in plant–soil microbiome. By contrast, we found little evidence of the role of mutualists in plant population fluctuations. These findings offer new insights for understanding mechanisms driving both long‐term vegetation dynamics and patterns of species coexistence and richness. [ABSTRACT FROM AUTHOR]

The research was conducted in the Azaz area, located in northern Syria, about 48 km north of Aleppo City, and about 5 km from the Turkish border. The aim was to study the effect of treatment with some biological compounds (Trichoderma fungi and Penicillium fungi) and organic compounds (Seaweed) on the growth and productivity of cucumber crop (AZ55F1 variety) and to determine the best-studied treatments. The semi-field cultivation method was adopted, and 5-liter agricultural pots were used. Four treatments were used in the study (three experimental treatments + control treatment), and each pot was considered a replicate, and five replicates represented each treatment. All treatments were distributed according to a completely randomized design (CRD). The results showed that all treatments used in the study (Trichoderma fungus, Seaweed, Penicillium fungus) were superior to the control in all studied traits (length, diameter, size, and weight of the fruit, number of fruits per plant, and productivity of the plant). There were no significant differences between the experimental treatments (Trichoderma fungus, Seaweed, Penicillium fungus) in the traits of length and diameter of the fruit and number of fruits per plant. The treatment with Trichoderma fungus was significantly superior to the Seaweed and Penicillium treatments in the trait of fruit size and weight and total productivity per plant. The Seaweed treatment was significantly superior to the treatment with Penicillium fungus in the trait of fruit size. In conclusion, the different treatments (Trichoderma fungus, Penicillium fungus, Seaweed) achieved an increase in productivity of 78.95%, 53.85%, and 50.97%, respectively, compared to the control. [ABSTRACT FROM AUTHOR]

BACKGROUND AND OBJECTIVES: Trichoderma species (Trichoderma sp.) is commonly found in nature, particularly in soil and roots, often thriving in plants rich in cellulose such as oil palm. Therefore, this study aimed to characterize Trichoderma sp. in each substrate as well as to assess cellulolytic and ligninolytic potential in vitro using a specific medium. Characterization and utilization of the plant were examined to efficiently manage empty fruit bunch (EFB) waste in Indonesian oil palm plantations. By exploring the biological, ecological, and biochemical attributes of Trichoderma sp., this study examined the mechanisms associated with efficacy in bioconversion processes and waste remediation. METHODS: A survey method was used to determine sampling locations, and purposive sampling was utilized in the field. Furthermore, several stages were undertaken including isolation, identification, as well as testing of morphology and potential in vitro. FINDINGS: The results showed that the growth characteristics of Trichoderma sp. in filling a petri dish spanned approximately five days, forming colonies with a dark green hue. Microscopically, the isolates consisted of conidiophores, phialides, and conidia. Meanwhile, in vitro potential was assessed through cellulolytic and lignocellulolytic assays, with each isolate demonstrating varying capabilities in breaking down cellulose and lignocellulose. The highest cellulase activity (3.55 units per gram) was observed in enzyme starter granules treated with air drying. The highest viability per gram was found in spore inoculum (17.0 x 107) with air drying treatment. The greatest reduction in weight of oil palm EFB waste (65.3 percent) was achieved through the application of Trichoderma sp. enzyme starter granules with air drying treatment. Furthermore, eight isolates demonstrated cellulolytic and ligninolytic potential. Isolates sourced from soil had rapid growth on starter and baglog mediums, indicating potential for subsequent field applications as a biodegradation agent for organic waste. CONCLUSION: Based on the macroscopic (shape and color of mycelium) and microscopic characteristics (mycelium form), a total of eight Trichoderma sp. isolates were obtained. During the potential test, it was observed each isolate had different cellulolytic and ligninolytic activities. This study provided valuable insights into the diversity and enzymatic potential of Trichoderma sp. fungi, underscoring the importance of selecting suitable strains and optimizing cultivation conditions for various biotechnological applications. By exploring cellulolytic and ligninolytic capabilities, the results contributed to the development of more efficient and sustainable strategies for organic waste management and bioconversion. In general, this study represented a significant milestone in the quest for sustainable waste management solutions in agriculture, offering a promising pathway towards mitigating environmental impact and promoting the long-term sustainability of oil palm cultivation. [ABSTRACT FROM AUTHOR]

The human population is expanding at an exponential rate, and has created a great surge in the demand for food production. To intensify the rate of crop production, there is a tremendous usage of chemical pesticides and fertilizers. The practice of using these chemicals to enhance crop productivity has resulted in the degradation of soil fertility, leading to the depletion of native soil microflora. The constant application of these hazardous chemicals in the soil possesses major threat to humans and animals thereby impacting the agroecosystem severely. Hence, it is very important to hunt for certain new alternatives for enhancing crop productivity in an eco-friendly manner by using the microbial bioformulations. Microbial bioformulations can be mainly divided into two types: solid and liquid. There is a lot of information available on the subject of solid bioformulation, but the concept of liquid bioformulation is largely ignored. This article focuses on the diverse spectrum of liquid bioformulation pertaining to the market capture, its different types, potency of the product, mode of usage, and the limitations encountered. Also the authors have tried to include all the strategies required for sensitizing and making liquid bioformulation approach cost effective and as a greener strategy to succeed in developing countries. [ABSTRACT FROM AUTHOR]

Objectives To screen high active volatile organic compounds (VOCs)-producing Trichoderma isolates against strawberry gray mold caused by Botrytis cinerea, and to explore their antagonistic mode of action against the pathogen. VOCs produced by nine Trichoderma isolates (Trichoderma atroviride T1 and T3; Trichoderma harzianum T2, T4 and T5; T6, T7, T8 and T9 identified as Trichoderma asperellum in this work) significantly inhibited the mycelial growth (13.9−63.0% reduction) and conidial germination (17.6−96.3% reduction) of B. cinerea, the highest inhibition percentage belonged to VOCs of T7; in a closed space, VOCs of T7 shared 76.9% and 100% biocontrol efficacy against gray mold on strawberry fruits and detached leaves, respectively, prolonged the fruit shelf-life by 3 days in presence of B. cinerea, completely protected the leaves from B. cinerea infecting; volatile metabolites of T7 damaged the cell membrane permeability and integrity of B. cinerea, thereby inhibiting the mycelial growth and conidial germination. Gas chromatography-mass spectrometry (GC–MS) analysis revealed the VOCs contain 23 potential compounds, and the majority of these compounds were categorised as alkenes, alcohols, and esters, including PEA and 6PP, which have been reported as substances produced by Trichoderma spp. T. asperellum T7 showed high biofumigant activity against mycelial growth especially conidial germination of B. cinerea and thus protected strawberry fruits and leaves from gray mold, which acted by damaging the pathogen's plasma membrane and resulting in cytoplasm leakage, was a potential biofumigant for controlling pre- and post-harvest strawberry gray mold. [ABSTRACT FROM AUTHOR]

The present investigation involved the isolation of a Cr(VI) tolerant fungal (native) isolate (DK04) from Sukinda Chromite Mine, Odisha, exhibiting a tolerance potential of Cr(VI) 300 mg/L for the metal species. The isolate was identified as Trichoderma virens DK04 based on sequencing of the ITS region. The ability of the isolate to reduce and remove Cr(VI) demonstrated that at 100 mg/L concentration of Cr(VI) 99.83% reduction in titer was acheived within 144 hours. SEM, FTIR, EDX, and XRD analysis, reveal deficiency of mycelia pellets for removal of chromium by an adsorption/precipitation mechanism. The isolate DK04, showed promising bioreducing capabilities over a range of temperature (20-400C), pH (5.0-9.0), heavy metals (Zn, Fe, Ni, As) and metabolic inhibitors (phenol and EDTA). The result showed that T. virens isolate has an exceptional potentialto cope with Cr(VI) under stress and has a huge possibility for application performance in Cr(VI) detoxification at Sukinda Chromite Mine as well as other Chromium contaminated sites. [ABSTRACT FROM AUTHOR]

Managing plant diseases caused by phytopathogenic fungi, such as anthracnose caused by Colletotrichum species, is challenging. Different methods have been used to identify compounds with antibiotic properties. Trichoderma strains are a source of novel molecules with antifungal properties, including volatile organic compounds (VOCs), whose production is influenced by the nutrient content of the medium. In this study, we assessed the VOCs produced in dual confrontation systems performed in two culture media by Trichoderma strains (T. atroviride IMI206040, T. asperellum T1 and T3, and Trichoderma sp. T2) on Colletotrichum acutatum. We analysed the VOC profiles using gas chromatography coupled with mass spectrometry. The Luria Bertani (LB) medium stimulated the production of VOCs with antifungal properties in most systems. We identified 2-pentyl furan, dimethyl disulfide, and α-phellandrene and determined their antifungal activity in vitro. The equimolar mixture of those VOCs (250 µM ea.) resulted in 14% C. acutatum diametral growth inhibition. The infective ability and disease severity caused by the mycelia exposed to the VOCs mixture were notably diminished in strawberry leaves. Application of these VOCs as biofumigants may contribute to the management of anthracnose. LB represents a feasible strategy for identifying novel VOCs produced by Trichoderma strains with antifungal properties. [ABSTRACT FROM AUTHOR]

Polyethylene mulching film, which is widely utilized in arid and semi-arid agriculture, leaves residual pollution. A novel approach to addressing this issue is microbial degradation. To screen the strains that degrade polyethylene efficiently and clarify the effect of degrading strains on the turnover of soil organic carbon, a polyethylene-degrading fungus PF2, identified as Trichoderma asperellum, was isolated from long-time polyethylene-covered soil. Strain PF2 induced surface damage and ether bonds, ketone groups and other active functional groups in polyethylene, with 4.15% weight loss after 30 days, where laccase plays a key role in the degradation of polyethylene. When applied to soil, the Trichoderma-to-soil weight ratios were the following: B1: 1:100; B2: 1:200; B3: 1:300 and B4: 1:400. Trichoderma asperellum significantly increased the cumulative CO2 mineralization and soil organic carbon mineralization in the B1 and B2 treatments compared with the control (B0). The treatments B1, B3 and B4 increased the stable organic carbon content in soil. An increase in the soil organic carbon content was observed with the application of Trichoderma asperellum, ranging from 27.87% to 58.38%. A positive correlation between CO2 emissions and soil organic carbon was observed, with the soil carbon pool management index (CPMI) being most correlated with active organic carbon. Trichoderma treatments improved the CPMI, with B3 showing the most favorable carbon retention value. Thus, Trichoderma asperellum not only degrades polyethylene but also contributes to carbon sequestration and soil fertility when applied appropriately. [ABSTRACT FROM AUTHOR]

Background: The ability of lignocellulose degradation for filamentous fungi is always attributed to their efficient CAZymes system with broader applications in bioenergy development. ADP-ribosylation factor GTPase-activating proteins (Arf-GAPs), pivotal in fungal morphogenesis, lack comprehensive studies on their regulatory mechanisms in lignocellulose utilization. Results: Here, the orthologs (TgGlo3 and TgGcs1) of Arf-GAPs in S. cerevisiae were characterized in Trichoderma guizhouense NJAU4742. The results indicated that overexpression of Tggcs1 (OE-Tggcs1) enhanced the lignocellulose utilization, whereas increased expression of Tgglo3 (OE-Tgglo3) elicited antithetical responses. On the fourth day of fermentation with rice straw as the sole carbon source, the activities of endoglucanase, cellobiohydrolase, xylanase, and filter paper of the wild-type strain (WT) reached 8.20 U mL−1, 4.42 U mL−1, 14.10 U mL−1, and 3.56 U mL−1, respectively. Compared to WT, the four enzymes activities of OE-Tggcs1 increased by 7.93%, 6.11%, 9.08%, and 12.92%, respectively, while those decreased to varying degrees of OE-Tgglo3. During the nutritional growth, OE-Tgglo3 resulted in the hyphal morphology characterized by sparsity and constriction, while OE-Tggcs1 led to a notable increase in vacuole volume. In addition, OE-Tggcs1 exhibited higher transport efficiencies for glucose and cellobiose thereby sustaining robust cellular metabolic rates. Further investigations revealed that Tgglo3 and Tggcs1 differentially regulated the transcription level of a dynamin-like GTPase gene (Tggtp), eliciting distinct redox states and apoptotic reaction, thus orchestrating the cellular response to lignocellulose utilization. Conclusions: Overall, these findings underscored the significance of TgArf-GAPs as pivotal regulators in lignocellulose utilization and provided initial insights into their differential modulation of downstream targets. [ABSTRACT FROM AUTHOR]

The decline in crop yields is attributed to uneven chemical fertilization practices and poor soil fertility. From a sustainability perspective, the application of beneficial microorganisms alongside a blend of inorganic and organic fertilizers significantly influences crop productivity and food security. Concerns within the scientific community arise from the haphazard and negligent use of fertilizers. Farming communities predominantly reliant on chemical fertilizers often overlook the application of organic alternatives, leading to a gradual decline in soil organic matter and native nutrient levels, ultimately resulting in decreased crop yields. In diverse cropping systems, the amalgamation of chemical, biological, and organic sources sustains soil health, replenishes nutrients, and optimizes crop yields. Plant residues enhance soil microbial activity, expedite nutrient cycling and availability, and aid in preserving soil health through carbon sequestration. Regular utilization of plant residues and other organic materials enriches soil organic matter content, enhancing soil health and productivity. Integrating organic and chemical fertilizers presents a potential avenue to enhance maize and soybean yields in maize-wheat cropping systems, subsequently benefiting wheat crop productivity and profitability. The efficacy of specific soil nutrients can be heightened by combining organic sources with various chemical fertilization techniques. Hence, incorporating phosphorus fertilization alongside phosphorus-mobilizing and solubilizing agents (such as Trichoderma & PSB), along with the integrated management of peach waste materials including residues, compost, and biochar, is imperative for promoting crop growth, increasing seed yields, and fostering environmental sustainability. [ABSTRACT FROM AUTHOR]

Currently, phylloremediation has emerged as a highly effective method for eliminating air pollutants, particularly polyaromatic hydrocarbons (PAHs). When PAHs accumulate on the phyllosphere, they significantly impact the fungal communities residing on leaf surfaces. This study aimed to investigate how pollution distribution patterns affect the diversity and PAH-degrading abilities of phyllosphere fungi, alongside identifying suitable mathematical models for PAH degradation. Leaf samples from two locations, Maradana and Sapugaskanda, were identified as having the highest PAH concentrations through principal component analysis. The fungal diversity in these highly contaminated regions was varied, with dominant species exhibiting greater PAH-degrading capabilities than those in less polluted areas. Thirty-five morphologically different epiphytic fungal strains were isolated on Potato Dextrose Agar (PDA) medium using the sample leaf wash. Two different fungal strains were selected as the best PAH degraders among those 35 different strains. These fungal strains were identified as Trichoderma harzianum P4M-16, and Fusarium solani P11M-46 based on ITS sequence data. Notably, these fungal species were more prevalent in highly polluted urban areas compared to less contaminated sites. High-Performance Liquid Chromatography (HPLC) analysis revealed that these two fungal species degrade PAHs more efficiently than others. Their kinetics assays demonstrated alignment with four degradation models when breaking down phenanthrene, naphthalene, pyrene, and anthracene. Scanning electron microscopy images showed that these fungi function as endophytes, extending their mycelium into the core leaf tissue layers beyond the epidermis. Gas Chromatography-Mass Spectrometry (GCMS) analysis indicated that F. solani P11M-46 produced non-toxic byproducts during the breakdown of phenanthrene and anthracene, confirming their eco-friendly nature. Overall, our findings suggest the promising potential of using phyllosphere fungi in bioremediation processes for environmental pollutants such as PAHs. [ABSTRACT FROM AUTHOR]

Advances in genomics and transcriptomics accompanying the rapid accumulation of omics data have provided new tools that have transformed and expanded the traditional concepts of model fungi. Evolutionary genomics and transcriptomics have flourished with the use of classical and newer fungal models that facilitate the study of diverse topics encompassing fungal biology and development. Technological advances have also created the opportunity to obtain and mine large datasets. One such continuously growing dataset is that of the Sordariomycetes, which exhibit a richness of species, ecological diversity, economic importance, and a profound research history on amenable models. Currently, 3,574 species of this class have been sequenced, comprising nearly one-third of the available ascomycete genomes. Among these genomes, multiple representatives of the model genera Fusarium, Neurospora, and Trichoderma are present. In this review, we examine recently published studies and data on the Sordariomycetes that have contributed novel insights to the field of fungal evolution via integrative analyses of the genetic, pathogenic, and other biological characteristics of the fungi. Some of these studies applied ancestral state analysis of gene expression among divergent lineages to infer regulatory network models, identify key genetic elements in fungal sexual development, and investigate the regulation of conidial germination and secondary metabolism. Such multispecies investigations address challenges in the study of fungal evolutionary genomics derived from studies that are often based on limited model genomes and that primarily focus on the aspects of biology driven by knowledge drawn from a few model species. Rapidly accumulating information and expanding capabilities for systems biological analysis of Big Data are setting the stage for the expansion of the concept of model systems from unitary taxonomic species/genera to inclusive clusters of well-studied models that can facilitate both the in-depth study of specific lineages and also investigation of trait diversity across lineages. The Sordariomycetes class, in particular, offers abundant omics data and a large and active global research community. As such, the Sordariomycetes can form a core omics clade, providing a blueprint for the expansion of our knowledge of evolution at the genomic scale in the exciting era of Big Data and artificial intelligence, and serving as a reference for the future analysis of different taxonomic levels within the fungal kingdom. [ABSTRACT FROM AUTHOR]

The advancement of fungal biocontrol agents depends on replacing cereal grains with low-cost agro-industrial byproducts for their economical mass production and development of stable formulations. We propose an innovative approach to develop a rice flour-based formulation of the beneficial biocontrol agent Trichoderma asperelloides CMAA1584 designed to simulate a micro-bioreactor within the concept of full biorefinery process, affording in situ conidiation, extended shelf-life, and effective control of Sclerotinia sclerotiorum, a devastating pathogen of several dicot agricultural crops worldwide. Rice flour is an inexpensive and underexplored byproduct derived from broken rice after milling, capable of sustaining high yields of conidial production through our optimized fermentation-formulation route. Conidial yield was mainly influenced by nitrogen content (0.1% w/w) added to the rice meal coupled with the fermentor type. Hydrolyzed yeast was the best nitrogen source yielding 2.6 × 109 colony-forming units (CFU)/g within 14 days. Subsequently, GControl, GLecithin, GBreak-Thru, GBentonite, and GOrganic compost+Break-Thru formulations were obtained by extrusion followed by air-drying and further assessed for their potential to induce secondary sporulation in situ, storage stability, and efficacy against Sclerotinia. GControl, GBreak-Thru, GBentonite, and GOrganic compost+Break-Thru stood out with the highest number of CFU after sporulation upon re-hydration on water-agar medium. Shelf-life of formulations GControl and GBentonite remained consistent for > 3 months at ambient temperature, while in GBentonite and GOrganic compost+Break-Thru formulations remained viable for 24 months during refrigerated storage. Formulations exhibited similar efficacy in suppressing the myceliogenic germination of Sclerotinia irrespective of their concentration tested (5 × 104 to 5 × 106 CFU/g of soil), resulting in 79.2 to 93.7% relative inhibition. Noteworthily, all 24-month-old formulations kept under cold storage successfully suppressed sclerotia. This work provides an environmentally friendly bioprocess method using rice flour as the main feedstock to develop waste-free granular formulations of Trichoderma conidia that are effective in suppressing Sclerotinia while also improving biopesticide shelf-life. Key points: • Innovative "bioreactor-in-a-granule" system for T. asperelloides is devised. • Dry granules of aerial conidia remain highly viable for 24 months at 4 °C. • Effective control of white-mold sclerotia via soil application of Trichoderma-based granules. [ABSTRACT FROM AUTHOR]

This study looked at the amount of tropane alkaloids in both the leaves of the mother plant and the callus cultures of Hyoscyamus niger L. It also looked at how biotic elicitation affects the growth of callus cultures and increases the production of alkaloids. The investigation identified and quantified three primary tropane alkaloids (Hyoscyamine, Scopolamine, and Atropine) from both sources. Remarkably, the callus cultures exhibited obviously higher levels of alkaloids in comparison to the leaves of the mother plant, implying their potential as a valuable reservoir for alkaloid production. Concerning the effects of biotic elicitation, the study showed that the application of chitosan (CHT), yeast extract (YE), and fungal extract of Trichoderma asperellum yielded a substantial decrease in callus weight when contrasted with the control group. This decrease became more pronounced with escalating concentrations of the elicitors. In terms of alkaloid synthesis, a clear correlation between the concentration of bio stimulants and tropane alkaloid levels was established. Particularly, CHT elicitation displayed the most pronounced enhancement in levels of tropane alkaloids among the three elicitors. Notably, the highest CHT concentration of 40 mg/L yielded the most elevated levels of alkaloids, measuring at 25.3 µg/g for Hyoscyamine, 31.2 µg/g for Scopolamine, and 21.5 µg/g for Atropine. This represents approximate percentage increases in concentration of 208%, 183%, and 198%, respectively, when compared to the control treatment. Generally, these findings carry significant implications for advancing tropane alkaloid biosynthesis, with potential applications spanning the pharmaceutical and biotechnology sectors. [ABSTRACT FROM AUTHOR]

Background: Plant phyllosphere microbes are important for the host plant's protection. Plant growth‐promoting rhizobacteria (PGPR) and Trichoderma are common biocontrol agents (BCAs) for disease management. Pathogens and BCAs can change the rhizosphere microbial composition; however, the effect of PGPR or Trichoderma on plant phyllosphere microbes, particularly for mesocosms involving the interaction between pathogens and BCAs, is not well known. Methods: High‐throughput sequencing was used to identify the phyllosphere bacterial community of common vetch interacting with Colletotrichum spinaciae, two PGPRs (Bacillus subtilis and Bacillus licheniformis), and Trichoderma longibrachiatum. We evaluated anthracnose severity, phyllosphere bacteria diversity and composition, and the relationship between the activities of plant defense enzymes and hormonal molecules in plants treated with individual and combined inoculations of PGPRs, Trichoderma, and C. spinaciae. Results: PGPR or Trichoderma alone reduced disease severity. Trichoderma reduced the salicylic acid content, PGPR increased the catalase activity in plants, and co‐inoculation of PGPR and Trichoderma decreased the salicylic acid content. Inoculation of PGPR and Trichoderma individually or in combination changed the disease‐associated phyllosphere bacteria, and this effect was related to plant defense enzymes and hormonal molecules. Conclusions: We suggest that the plant defense response induced by PGPR and Trichoderma results in the enrichment of a fraction of favorable chloroplastic bacteria, which facilitates plant defense against diseases. [ABSTRACT FROM AUTHOR]

Parasitism is an important lifestyle in the Trichoderma genus but has not been studied in a genus-wide way toward Pythium and Globisporangium hosts. Our approach screened a genus-wide set of 30 Trichoderma species in dual culture assays with two soil-borne Pythium and three Globisporangium plant-parasitic species and used exo-proteomic analyses, with the aim to correlate Trichoderma antagonism with potential strategies for attacking Pythium and Globisporangium. The Trichoderma spp. showed a wide range of antagonism from strong to weak, but the same Trichoderma strain showed similar levels toward all the Pythium and Globisporangium species. The Trichoderma enzymes from strong (Trichoderma asperellum, Trichoderma atroviride, and Trichoderma virens), moderate (Trichoderma cf. guizhouense and Trichoderma reesei), and weak (Trichoderma parepimyces) antagonists were induced by the autoclaved mycelia of one of the screened Pythium species, Pythium myriotylum. The variable proportions of putative cellulases, proteases, and redox enzymes suggested diverse as well as shared strategies amongst the antagonists. There was a partial positive correlation between antagonism from microscopy and the cellulase activity induced by autoclaved P. myriotylum mycelia in different Trichoderma species. The deletion of the cellulase transcriptional activator XYR1 in T. reesei led to lower antagonism toward Pythium and Globisporangium. The antagonism of Pythium and Globisporangium appears to be a generic property of Trichoderma as most of the Trichoderma species were at least moderately antagonistic. While a role for cellulases in the antagonism was uncovered, cellulases did not appear to make a major contribution to T. reesei antagonism, and other factors are also likely contributing. [ABSTRACT FROM AUTHOR]

The seeds of Guibourtia coleosperma serve as potential Agroathelia rolfsii severely infects 500 plant species causing stem and root rots on plants including eggplants. This study evaluated the compatibility of integration of chemical fungicides x biological agents for the management of recalcitrant disease agents like A. rolfsii. A factorial trial was set up using the completely randomized design with each treatment being replicated thrice. Interaction of Mancozeb (at 50 and 100% concentrations) x Trichoderma species caused 29.3-100% inhibition of A. rolfsii and Ketoconazole (at 50 and 100% concentrations) x Trichoderma species caused 95.8-100% inhibition of A. rolfsii. Mancozeb (100% concentration) x T. harzianum controlled the pathogen most, followed by the T. viride combination. The percentage inhibition by chemical fungicide (main effects) ranged from 100% inhibition by Ketoconazole (100% concentration) to 97.9-100% for Ketoconazole (50% concentration), to 65.2-93.6% for Mancozeb (100% concentration) and lastly 23.3-78.6% for Mancozeb (50% concentration) with time. The percentage inhibition (main effects) ranged from 60.3-96.7% for T. virens, 60.8-92.1% for T. harzianum, and 69.3-95.8% for T. viride with time. The chemical fungicides and Trichoderma species were highly positively correlated (0.522** at p = 0.05). The high concentrations of the fungicides antagonized the Trichoderma species as well, so more work should be carried out on this aspect. This approach to disease management for eggplants is highly effective using chemical x biocontrol agents to safeguard eggplants from A. rolfsii. Applying this method can protect crops and result in long-term profitability. The combination of fungicides and biocontrol agents is strongly recommended for the management of this fungal pathogen. [ABSTRACT FROM AUTHOR]

Trichoderma is one of the most widely used microorganisms in the biological control of plant pathogens. The techniques for its formulation are well known and are commercially distributed in both solid and liquid presentations based on formulations of its reproductive structures. Currently, agricultural systems integrate this type of fungus as an alternative for sustainable production, and even though its traditional formulation still has important limitations, it has a high potential to be combined with new technologies for the development and innovation of products that improve their effectiveness. In response to this, micro- and nanotechnology are presented as alternatives to technify bioagents, promoting greater resistance, viability, and dissemination for both biomass and metabolites through encapsulation and smart delivery techniques. Some works have been developed to achieve this, especially using ionic gelation, with good results for agriculture. In this work, some generalities of the organism are mentioned, including its most common formulations for agricultural applications, information related to encapsulation systems, and the potential for improvement of biologics represented by biomass microencapsulation. [ABSTRACT FROM AUTHOR]

Mycoparasite secondary metabolites control fungal infections or diseases in agriculture and human health. Among genes involved in synthesizing secondary metabolites, cytochrome P450 monooxygenases (CYPs/P450s) play a key role in synthesizing and attributing diversity to the secondary metabolites. Despite the importance of P450s, a comparative analysis of P450s in mycoparasites has yet to be reported. This study is aimed at addressing this research gap. Genome-wide analysis of P450s in 43 fungi representing six fungal phyla and three distinct lifestyles, such as mycoparasitic (24 species), saprophytic (5 species), and ectomycorrhizal (14 species), revealed the expansion of P450s in Pezizomycete mycoparasites for the synthesis of secondary metabolites. The number of P450s and their families and subfamilies, the number of secondary-metabolite biosynthetic gene clusters (SMBGCs), and the number of P450s that are part of these SMBGCs were found to be highest in Pezizomycete mycoparasites compared to their counterparts of saprophytes and ectomycorrhiza, indicating P450s also play a key role in mycoparasitism. An analysis of P450 location as part of SMBGCs and the available literature on Pezizomycete P450s revealed that P450s play a key role in the synthesis of anti-fungal secondary metabolites such as trichothecene sesquiterpene, harzianum A, heptelidic acid, and gliotoxin. The mycoparasite Trichoderma virens Tv29.8 P450 CYP68Q3 is found to be a bifunctional enzyme with epoxidation and oxidation capability, and CYP5117A3 performs a Baeyer–Villiger oxidation reaction with regioselectivity. This study serves as a reference for future annotation of P450s in mycoparasites. [ABSTRACT FROM AUTHOR]

The article titled "Sclerotinia sclerotiorum in beans and potatoes in Sinaloa: Etiology, epidemiology, and management alternatives" describes the disease of white mold in bean and potato crops in Sinaloa. The symptoms and signs of the disease are detailed, as well as the cultural and morphological characteristics of the pathogen. The implementation of a prediction system for disease management is also addressed, which includes soil temperature and crop flowering. It is mentioned that the fungi Trichoderma harzianum, T. viride, and T. atroviride have been shown to be effective in controlling white mold in the field. New lines of research are proposed to improve disease management. [Extracted from the article]

A total of 30 native Trichoderma isolates were collected from the Agricultural Research Station, Ummedganj- Kota, Rajasthan, India. Out of which 9 native isolates were evaluated for bio-efficacy against Sclerotium rolfsii. Isolate ARS K-21 exhibited maximum inhibition (89.26%), followed by ARS K-11 (83.70%) in dual culture. Subsequent evaluations revealed the compatibility of efficient isolate ARS K-21 with various bio botanicals displaying minimum inhibition with Vermiwash (1.11–3.70%) followed by Beejamarat (0.38–15.92%) and Brahmastra (7.78–19.68%), while ARS K-11 displayed compatibility only with Dasparni ark with a minimum inhibition of 1.11–3.70%. Assessment of abiotic stress tolerance of the isolates revealed that most isolates thrived at 200 mM and 400 mM NaCl salt concentrations, with ARS K-21 and ARS K-24 demonstrating moderate growth levels across higher concentrations, except at 1200 mM. Optimal growth of the isolates occurred at 25 and 30 °C, with deviations leading to growth inhibition. Isolates ARS K-1, ARS K-11, ARS K-12 and ARS K-21 exhibited resilience to temperature extremes. ARS K-21 has shown exceptional growth proficiency across a wide pH spectrum (pH 5 to 8.5) followed by ARS K- 24, highlighting their versatility. Mass multiplication of efficient isolate ARS K-21 enriched with vermicompost led to the standardization of a dosage (30 g/kg soil) for managing collar rot in lentil crops at 5 g inoculum per kg soil of S. rolfsii. [ABSTRACT FROM AUTHOR]

Fusarium wilt and gummosis disease is a major concern in Subabul plantations, resulting in quantitative and qualitative wood losses to the paper and pulp industry. Growers currently rely on agrochemicals, which are not environmentally safe. Therefore, developing a sustainable control strategy employing biocontrol agents is necessary. For this, the investigation was performed to identify native Trichoderma strains from Subabul rhizospheric soil having antagonistic, disease control efficiency, and PGPR attributes. Six antagonistic Trichoderma (TR1 to TR6) strains were isolated and their efficacy was tested against Fusarium in-vitro by dual plate technique and volatile metabolites. Among these, Trichoderma strains TR1 and TR2 were found efficient in counteracting the growth of F. equiseti (70–90% inhibition) compared to control. The effectiveness was primarily attributed to the increased production of volatile metabolites, siderophores, and the ability to solubilise the nutrients (P and K). Further, six potent Trichoderma strains were identified as T. asperellum (TR1, TR2, TR3, TR6), and T. hamatum (TR4, TR5) through rDNA ITS gene sequencing and phylogenetic analysis. These isolates were mass-multiplied, formulated using Talc powder followed by bio-priming in rooting media. The application of Trichoderma into rooting media reduced the wilt disease caused by artificial inoculation of F. equiseti. Further, TR1 and TR2 were found promising with conferred protection against wilt, enhanced survival rate (10–15%), and improved growth compared to untreated control. Application of adapted TR1 and TR2 antagonists in rooting media during clonal multiplication has the potential wilt control efficiency, enhanced survival rate, and plant growth promotion in Subabul. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Over the past few decades, the use of different biocontrol agents in agricultural methods has resulted in significant improvements in the safety and nutritional quality of food products. Consequently, there has been an increasing interest in finding effective alternative approaches to reduce abiotic stress pressures that also promote plant growth. Trichoderma harzianum is a biocontrol agent that has attracted scientific attention due to its remarkable capacity to combat various abiotic influences. The multifaceted mechanisms of disease prevention and crop growth acceleration exhibited by the filamentous fungus T. harzianum have rendered it a highly useful biocontrol agent. Trichoderma spp. positively influence several physiological cellular processes in plants, such as photosynthesis, stomatal conductance, gas exchange, nutrient absorption and assimilation, and water expenditure efficiency. Trichoderma species promoted optimal root development and improved the absorption of mineral nutrients from the soil. In summary, the fungus Trichoderma shows significant potential as a biocontrol agent for the sustainable protection of crops and the stimulation of plant growth. The varied mechanisms of Trichoderma species make them indispensable for the management of plant diseases. The utilization of Trichoderma potential is a significant avenue for achieving robust and ecologically sound crop production, particularly in challenging circumstances, as the worldwide agricultural sector strives for substitutes to harmful pesticides and excessive use of fertilizers. [ABSTRACT FROM AUTHOR]

Apple scab, caused by the pathogenic fungus Venturia inaequalis, can result in significant economic losses. The frequent use of fungicidal products has led to the emergence of isolates resistant to commonly used active substances. Therefore, biological control offers a sustainable alternative for managing apple scab. In this study, eight Trichoderma isolates were evaluated against five different isolates of V. inaequalis isolated from the Fes-Meknes region. The biocontrol potential of these Trichoderma isolates had previously been demonstrated against other pathogens. The results indicated that the inhibition rate of mycelial growth of V. inaequalis obtained with Trichoderma spp. isolates ranged from 50% to 81%, with significant differences observed among the pathogenic isolates after 5 and 12 days of incubation. In addition, the in vitro tests with Trichoderma cell-free filtrates showed inhibition rates ranging from 2% to 79%, while inhibition rates ranged from 5% to 78% for volatile compound tests. Interestingly, the inhibition of spore germination and elongation was approximately 40–50%, suggesting the involvement of antifungal metabolites in their biocontrol activities. The in vivo bioassay on detached apple leaves confirmed the biocontrol potential of these Trichoderma isolates and demonstrated their ability to preventively control apple scab disease. However, their efficacies were still lower than those of the fungicidal product difenoconazole. These findings could contribute to the development of an effective biofungicide based on these Trichoderma isolates for reliable and efficient apple scab control. [ABSTRACT FROM AUTHOR]

Introducción. Aedes aegypti es un vector importante de enfermedades arbovirales como el dengue, entre otras. Las estrategias tradicionales de control, como el uso de insecticidas, han perdido eficacia debido a la aparición de resistencia en las poblaciones de mosquitos. El control biológico y el uso de hongos biocontroladores se presentan como alternativas viables y amigables con el medio ambiente. Objetivo. Evaluar la patogenicidad in vitro de aislamientos del género Trichoderma –obtenidos del Urabá antioqueño– sobre larvas de Ae. aegypti, y determinar la concentración letal media (CL50) y el tiempo letal medio (TL50) del más patógeno. Materiales y métodos. Mediante el método de larvas centinelas con especímenes de Ae. aegypti, se logró aislar hongos de cuerpos de agua de la región del Urabá (Antioquia). Los aislamientos se caracterizaron a nivel morfológico y molecular, para determinar su identidad taxonómica. Se llevaron a cabo pruebas de patogenicidad in vitro utilizando larvas de Ae. aegypti en los estadios L2 y L3. Posteriormente, se seleccionó una cepa para determinar su concentración letal media y tiempo letal medio. Resultados. La cepa AP-91 de Trichoderma sp. causó porcentajes altos de mortalidad en poblaciones de larvas de Ae. aegypti. Se obtuvo una concentración letal media de 1,8 × 107 conidios/ml y un tiempo letal medio de 20,67 horas. Conclusión. La cepa AP-91 tiene potencial para el control biológico de Ae. aegypti y puede ser una candidata idónea para usar en el manejo integrado de vectores mediante su cultivo escalado. La investigación sugiere explorar los compuestos y enzimas producidos por esta cepa para comprender mejor su patogenicidad.

Abstract Fungi in the genus Trichoderma are widespread in the environment, mainly in soils. They are used in agriculture because of their mycoparasitic potential; Trichoderma have the ability to increase plant health and provide protection against phytopathogens, making them desirable plant symbionts. We isolated, identified, and characterized Trichoderma from different regions of Saudi Arabia and evaluated the ability of Trichoderma to promote plant growth. Morphological and molecular characterization, along with phylogenetic studies, were utilized to differentiate between Trichoderma species isolated from soil samples in the Abha and Riyadh regions, Saudi Arabia. Then, plant growth-promoting traits of the isolated Trichoderma species were assessed. Eight Trichoderma isolates were characterized via morphological and molecular analysis; six (Trichoderma koningiopsis, Trichoderma lixii, Trichoderma koningii, Trichoderma harzianum, Trichoderma brevicompactum, and Trichoderma velutinum) were from Abha and two (T. lixii and T. harzianum) were from Riyadh. The isolated Trichoderma strains belonged to three different clades (Clade 1: Harzianum, Clade 2: Brevicompactum, and Clade 3: Viride). The Trichoderma isolates varied in plant growth-promoting traits. Seeds treated with most isolates exhibited a high percentage of germination, except seeds treated with the T3-T. koningii isolate. 100% germination was reported for seeds treated with the T4-T. harzianum and T6-T. brevicompactum isolates, while seeds treated with the T1-T. koniniopsis and T5-T. lixii isolates showed 91.1% and 90.9% germination, respectively. Seeds treated with the T8-T. velutinum, T2-T. lixii, and T7-T. harzianum isolates had germination rates of 84.1%, 82.2%, and 72.7%, respectively. The Trichoderma isolate T5-T. lixii stimulated tomato plant growth the most, followed by T7-T. harzianum, T8-T. velutinum, T4-T. harzianum, T1-T. koniniopsis, T2-T. lixii, and T6-T. brevicompactum; the least effective was T3-T. koningii. A maximum fresh weight of 669.33 mg was observed for the T5-T. lixii-treated plants. The Abha region had a higher diversity of Trichoderma species than the Riyadh region, and most isolated Trichoderma spp. promoted tomato growth.

Abstract Background Plant phyllosphere microbes are important for the host plant's protection. Plant growth‐promoting rhizobacteria (PGPR) and Trichoderma are common biocontrol agents (BCAs) for disease management. Pathogens and BCAs can change the rhizosphere microbial composition; however, the effect of PGPR or Trichoderma on plant phyllosphere microbes, particularly for mesocosms involving the interaction between pathogens and BCAs, is not well known. Methods High‐throughput sequencing was used to identify the phyllosphere bacterial community of common vetch interacting with Colletotrichum spinaciae, two PGPRs (Bacillus subtilis and Bacillus licheniformis), and Trichoderma longibrachiatum. We evaluated anthracnose severity, phyllosphere bacteria diversity and composition, and the relationship between the activities of plant defense enzymes and hormonal molecules in plants treated with individual and combined inoculations of PGPRs, Trichoderma, and C. spinaciae. Results PGPR or Trichoderma alone reduced disease severity. Trichoderma reduced the salicylic acid content, PGPR increased the catalase activity in plants, and co‐inoculation of PGPR and Trichoderma decreased the salicylic acid content. Inoculation of PGPR and Trichoderma individually or in combination changed the disease‐associated phyllosphere bacteria, and this effect was related to plant defense enzymes and hormonal molecules. Conclusions We suggest that the plant defense response induced by PGPR and Trichoderma results in the enrichment of a fraction of favorable chloroplastic bacteria, which facilitates plant defense against diseases.

Abstract Background The ability of lignocellulose degradation for filamentous fungi is always attributed to their efficient CAZymes system with broader applications in bioenergy development. ADP-ribosylation factor GTPase-activating proteins (Arf-GAPs), pivotal in fungal morphogenesis, lack comprehensive studies on their regulatory mechanisms in lignocellulose utilization. Results Here, the orthologs (TgGlo3 and TgGcs1) of Arf-GAPs in S. cerevisiae were characterized in Trichoderma guizhouense NJAU4742. The results indicated that overexpression of Tggcs1 (OE-Tggcs1) enhanced the lignocellulose utilization, whereas increased expression of Tgglo3 (OE-Tgglo3) elicited antithetical responses. On the fourth day of fermentation with rice straw as the sole carbon source, the activities of endoglucanase, cellobiohydrolase, xylanase, and filter paper of the wild-type strain (WT) reached 8.20 U mL−1, 4.42 U mL−1, 14.10 U mL−1, and 3.56 U mL−1, respectively. Compared to WT, the four enzymes activities of OE-Tggcs1 increased by 7.93%, 6.11%, 9.08%, and 12.92%, respectively, while those decreased to varying degrees of OE-Tgglo3. During the nutritional growth, OE-Tgglo3 resulted in the hyphal morphology characterized by sparsity and constriction, while OE-Tggcs1 led to a notable increase in vacuole volume. In addition, OE-Tggcs1 exhibited higher transport efficiencies for glucose and cellobiose thereby sustaining robust cellular metabolic rates. Further investigations revealed that Tgglo3 and Tggcs1 differentially regulated the transcription level of a dynamin-like GTPase gene (Tggtp), eliciting distinct redox states and apoptotic reaction, thus orchestrating the cellular response to lignocellulose utilization. Conclusions Overall, these findings underscored the significance of TgArf-GAPs as pivotal regulators in lignocellulose utilization and provided initial insights into their differential modulation of downstream targets.

Abstract Lemon balm (Melissa officinalis L.) is a valuable medicinal plant, but its growth can be significantly impacted by drought stress. This study aimed to mitigate the adverse effects of water deficit stress on lemon balm biomass by integrating poultry manure compost, poultry manure biochar, NPK fertilizer, Trichoderma harzianum, Thiobacillus thioparus, and elemental sulfur as soil amendments. The experiment was conducted in a greenhouse using a completely randomized design with a factorial arrangement, consisting of three replicates. It included a water deficit stress factor at three levels (95–100%, 75–80%, and 55–60% of field capacity) and a soil amendment treatment factor with eleven different fertilizer levels. Treatments included control (no amendment), NPK fertilizer, poultry manure compost, poultry manure biochar, and combinations of these with T. harzianum, T. thioparus, and elemental sulfur under various water deficit levels. Water deficit stress significantly reduced photosynthetic pigments, gas exchange parameters, chlorophyll fluorescence, relative water content, and antioxidant enzyme activity, while increasing membrane permeability and lipid peroxidation in lemon balm plants. However, the integrated application of organic, biological, and chemical amendments mitigated these negative impacts. The combined treatment of poultry manure compost, poultry manure biochar, NPK fertilizer, T. harzianum, T. thioparus, and elemental sulfur was the most effective in improving the morpho-physiological properties (1.97–60%) and biomass (2.31–2.76 times) of lemon balm under water deficit stress. The results demonstrate the potential of this holistic approach to enhance the resilience of lemon balm cultivation in water-scarce environments. The integration of organic, biological, and chemical amendments can contribute to sustainable agricultural practices by improving plant morphological and physiological properties and plant performance under drought conditions.

Dendrobium ovatum is a tropical epiphytic orchid endemic to the Western Ghats of India and has been listed as a threatened species in recent research due to its declining populations and changes in flowering and fruit set patterns. This study aims to investigate the mycoflora associated with the roots, stems and leaves of D. ovatum. Both surface‐associated and endophytic fungal associates were isolated and identified using morphological and molecular methods. The study resulted in the isolation of 139 cultures, which were divided into 24 morphotypes, 99% of which belonged to Ascomycota. The most dominant members, Trichoderma harzianum and Colletotrichum gloeosporioides, were consistently observed across all the study sites. Tissue‐specific fungal diversity analysis revealed that each organ was dominated by a distinct fungal group, forming characteristic communities specific to each tissue. The roots of D. ovatum exhibited the highest species richness and diversity, compared to the stem and leaves. This research also represents the first documentation of fungal associates of the threatened orchid D. ovatum.

Abstract Background Although potato virus Y (PVY) is the most serious virus-infecting potato plants worldwide, the losses concurred by it remain unmanageable due to the lack of efficient anti-PVY agents. Hence, the objective of this study was to assess the antiviral properties of secondary metabolite compounds obtained from culture filtrates of four Trichoderma spp. isolates. The assessment was conducted using computational methods, including molecular docking, absorption, distribution, metabolism, excretion, and toxicity (ADMET) analysis, as well as molecular dynamics simulations. The aim was to develop novel and effective agents for combating PVY. Results The GC–MS analysis of the studied Trichoderma spp. secondary metabolites revealed 24 compounds with relative amounts exceeding 10%. Molecular docking was then performed using MOE software to evaluate the activity of these compounds against the PVY protein coat (PDB-ID: 6HXX). Ningnanmycin and ribavirin, known plant virus inhibitors, were employed as reference ligands for comparison. Among the compounds tested, C9, C10, C13, and C19 exhibited superior docking scores, root mean square deviation (RMSD) values, and binding modes compared to the reference ligands. In addition, these compounds successfully passed the ADMET analysis. Further investigation focused on compounds C13 and C19, which underwent in-depth analysis through MDs for 100 ns. The MDs trajectories demonstrated that both complexes exhibited favorable stability, compactness, and binding modes throughout the simulation period. However, the C19/PVY-CP complex outperformed the C13 complex in all calculated parameters such as RMSD, root mean square fluctuation (RMSF), radius of gyration (RoG), solvent-accessible surface area (SASA), and intermolecular hydrogen bonds. Interestingly, these findings aligned with the results obtained from the docking analysis, indicating that C9 and C10 possess high potential against PVY, as they exhibited binding modes like that of C19. Conclusion These promising outcomes provide a solid foundation for considering the potential use of compounds C9, C10, C13, and C19 as antiviral agents. Further experimental validation and in-depth studies are warranted to assess the efficacy and safety of these compounds and their potential as antiviral therapeutics. To our knowledge, this is the first report to study the biological activities of the Trichoderma-based bioactive compounds against PVY using computational techniques. Graphical abstract