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This study evaluated the ability of a high-voltage electrostatic field (HVEF) treatment to extend the shelf life of tomatoes. Tomatoes were exposed to HVEF treatment for different lengths of time, and the physicochemical properties of tomatoes and bioactive compounds were monitored during 28 days of storage at 4 °C. The results indicated that the quality parameters of tomatoes were better maintained during storage by the HVEF treatment relative to the control treatment, extending their shelf life by 14–28 days. The HVEF treatment mitigated losses in firmness, weight, color changes, and bioactive substances, such as total phenolic content, total flavonoid content, ascorbic acid, and lycopene. The activity of pectin-degrading enzymes was also inhibited. The best exposure times for the HVEF treatment were 90 and 120 min. While the measured parameters decreased in both the control and HVEF treatment groups, the decrease in all of these measured parameters was significantly less (p < 0.05) in the optimum HVEF treatment groups than in the control. While the physicochemical properties may vary between different tomato varieties, the HVEF treatment of harvested tomatoes for 90 or 120 min can mitigate the degradation of quality parameters and loss of bioactive compounds incurred during the postharvest storage of tomatoes, thus maintaining their commercial value. [ABSTRACT FROM AUTHOR]

Kinnow mandarin is a perishable fruit that suffers from various post-harvest losses during storage and transportation. To preserve the postharvest quality of fresh fruit, this study investigated the effect of gum Arabic (GA) and essential oils (EO) of lemongrass (1.0%), neem (1.0%), and rosemary (1.0%) on Kinnow fruit. The results revealed that the composite coatings of gum Arabic (10%) and essential oils effectively maintained the titratable acidity, ascorbic acid content, total flavonoid content, and total antioxidant activity. Also, the coated fruit resulted in a reduced loss in weight, decay incidence and maintained higher enzymatic activities of phenylalanine ammonia-lyase (PAL), peroxidase (POD), and catalase in contrast to the uncoated fruit. Additionally, the scanning electron microscopic imageries of the GA + EO treated fruit revealed a smooth surface morphology whereas open stomatal pores were observed on uncoated fruit. The findings suggest that the GA 10% fortified with lemongrass oil (1.0%) could potentially be applied to maintain the quality attributes of Kinnow fruit stored at 5–7 °C for 75 days. [ABSTRACT FROM AUTHOR]

Postharvest waste due to decay of fruits and vegetables negatively affects food security, while at the same time control of decay and therefore waste can be limited because of consumer concerns about use of synthetic chemicals. Use of antagonistic microorganisms is an eco-friendly technique that represents a promising alternative approach to the use of chemical methods. Understanding the interactions between antagonists and the fruit microbiome will enable the discovery of new methods to reduce postharvest waste. This article reviews different microbial agents, fungi, bacteria and yeasts that could control decay. Recent developments in the use of microorganisms for preserving postharvest fruit quality, formulation of effective antagonists, and the commercialization steps are also discussed. Antagonists control decay through either direct or indirect mechanisms while preserving the appearance, flavor, texture and nutritional value of horticultural products. Microorganisms do not fully control pathogens, and therefore they are usually used with other treatments or have their biocontrol ability modified through genetic manipulations. Despite of these limitations, commercialization of biocontrol products based on antagonists with required stability and biocontrol potential is occurring. Biocontrol of postharvest decay and waste agent is promising technology for fruit and vegetable industries. Further study is necessary to better understand mechanisms and increasing efficiency of this method. [ABSTRACT FROM AUTHOR]

Tomato with prolonged fruit shelf life and improved postharvest quality would be an interesting commodity for breeders and consumers. A weak ethylene receptor mutant of experimental tomato, Sletr1-2, exhibits extended fruit shelf life without any undesirable pleiotropic effects. In this study, we elucidate the impact of Sletr1-2 mutation on the plant growth and fruit quality of the near-isogenic line containing the Sletr1-2 locus (NIL-Sletr1-2) under the genetic background of commercial tomatoes. The heterozygote line of BC3F1 and homozygote line of BC3F1, NIL-Sletr1-2 were generated by crossing the original Sletr1-2 mutant with commercial tomato cultivar 'Intan' and backcrossed three times. The plant growth and fruit quality were evaluated to identify the impact of Sletr1-2 mutation on NIL-Sletr1-2. The results showed that NIL-Sletr1-2 resulted in a longer fruit shelf life compared to BC2F1 and also 'Intan' while they have a smaller fruit size compared to BC3F1 and also resulted in orange-color fruit. These results indicate that Sletr1-2 mutation has favorable impacts on the postharvest quality of NIL-Sletr1-2 tomato fruit, resulting in improving fruit shelf-life, but still producing a smaller fruit size. [ABSTRACT FROM AUTHOR]

Jackfruit (Artocarpus heterophyllus Lam.), also known as 'vegetarian's meat', is an excellent source of carbohydrates, protein, fiber, vitamins, minerals, and several phytochemicals. It is a climacteric fruit that exhibits an increase in ethylene biosynthesis and respiration rate during fruit ripening. The market value of jackfruit is reduced due to the deterioration of fruit quality during storage and transportation. There is a lack of standardized harvest maturity index in jackfruit, where consequently, fruit harvested at immature or overmature stages result in poor quality ripe fruit with short storage life. Other factors responsible for its short postharvest life relate to its highly perishable nature, chilling sensitivity and susceptibility to fruit rot which result in significant qualitative and quantitative losses. Various postharvest management techniques have been adopted to extend the storage life, including cold storage, controlled atmosphere storage, modified atmosphere packaging, edible coatings, chemical treatment, and non-chemical alternatives. Diversified products have been prepared from jackfruit to mitigate such losses. This comprehensive review highlights the nutritional profile, fruit ripening physiology, pre and postharvest quality management, and value addition of jackfruit as well as the way forward to reduce postharvest losses in the supply chain. [ABSTRACT FROM AUTHOR]

Summary: Grape is widely consumed all over the world for its rich nutritious and health‐promoting effects. While grape berries are prone to quality deterioration after harvest. This study aimed to investigate the effect of eugenol treatment on the quality of grape berries based on the transcriptome. Harvested grape berries were treated with eugenol, and then collected for nutrient component determination and transcriptomics analyses. As a results, treatment with eugenol enhanced the berries firmness, increased the contents of soluble sugars, organic acids and phenolic compounds, improved the antioxidant capacity, and altered gene expression levels of related pathways. Transcriptome analysis revealed 699 differentially expressed genes by 100 mmol L−1 eugenol‐treated berries. Among these DEGs, the transcriptional levels involved in the cell wall, sugar and acid metabolism, phenylpropane metabolism, antioxidant enzymes, and WRKY, MYB family transcription factors were significantly regulated. This study will help to promote the application of eugenol for quality improvements in grape berries. [ABSTRACT FROM AUTHOR]

To investigate the effects of exogenous methyl jasmonate (MeJA) on the post-harvest quality of fresh lotus seed, MeJA (100 µmol/L) was used to soak the fresh lotus seed with water as the control. The changes in the color difference (L*, a*, b*), nutrient content (starch, soluble sugar), and other physiological and biochemical indexes (weight loss rate, total phenol content, malondialdehyde content, hydrogen peroxide content, polyphenol oxidase activity, superoxide dismutase activity, catalase activity and peroxidase activity) were compared every 2 days. The results showed that compared with the control group, the MeJA treatment effectively maintained the postharvest color of fresh lotus seed. After 8 days of storage, compared with the control group, the MeJA-treated group had a lower weight loss rate (decreased by 33.84%), and higher starch content (increased by 38.34 mg/g), higher soluble sugar content (increased by 70.58 mg/g), along with a reduced total phenol content, suppressed PPO activity, MDA content and H2O2 accumulation, and enhanced SOD, CAT and POD activities. The above results revealed that the MeJA treatment could delay the post-harvest quality decline of fresh lotus seed through reducing material consumption, maintaining starch and soluble sugar contents, reducing the oxidation of phenols, improving the activities of antioxidant enzymes, as well as maintaining the cell membrane integrity, thereby prolonging their shelf life. [ABSTRACT FROM AUTHOR]

Organic acids play critical roles in fruit physiological metabolism and sensory quality. However, the conventional storage of apple fruit at 0 ± 0.1 °C cannot maintain fruit acidity efficiently. This study investigated near-freezing temperature (NFT) storage for 'Golden Delicious' apples, and the quality parameters, organic acid content, and malate metabolism were studied. The results indicate that NFT storage at −1.7 ± 0.1 °C effectively maintained the postharvest quality of apple fruit when compared to traditional storage at 0 ± 0.1 °C. Fruit that underwent NFT storage showed a better appearance and lower respiratory rate, ethylene production, weight loss, and malondialdehyde (MDA) content but higher firmness and soluble solids content. Further, fruit after NFT storage contained higher titratable acid (18.75%), malate (51.61%), citrate (36.59%), and succinate (2.12%) content when compared to the control after 250 days. This was achieved by maintaining higher cytosolic NAD-dependent malate dehydrogenase (cyNAD-MDH), phosphoenolpyruvate carboxylase (PEPC), vacuolar H+-ATPase (V-ATPase), and vacuolar inorganic pyrophosphatase (V-PPase) activities that promote malate biosynthesis and accumulation while inhibiting enzyme activity that is responsible for malate decomposition, including phosphoenolpyruvate carboxylase kinase (PEPCK) as well as the cytosolic NAD phosphate-dependent malic enzyme (cyNADP-ME). Further, storage at NFTs maintained a higher expression of malate biosynthesis-related genes (MdcyNAD-MDH and MdPEPC) and transport-related genes (MdVHA and MdVHP) while suppressing malate consumption-related genes (MdcyME and MdPEPCK). The results demonstrate that NFT storage could be an effective application for apple fruit, which maintains postharvest quality and alleviates organic acid degradation. [ABSTRACT FROM AUTHOR]

Yellow or sour passion fruit is a climacteric fruit with a high rate of respiration and ethylene production, and postharvest technology is needed to extend its shelf life. This study investigated the properties of a biocomposite film with chitosan (CH) incorporated with beeswax (BW) and graphene oxide (GO) nanoparticles for use as an edible coating to extend the shelf life of yellow passion fruit at 22 °C and 70% RH for eight days. CH films associated with BW showed lower water vapor permeability (WVP) than films with CH alone. However, adding GO to the CH + BW biopolymer matrix improved the WVP, decreased the solubility (12.8%), and increased the opacity of the film by 9% compared to those of the CH film. Fruits coated with CH + BW or CH + BW + GO exhibited a reduction in respiration rate, a slower ripening process by approximately 3 days, and a significant decrease in weight loss. This also resulted in a higher soluble solids content and increased antioxidative capacity of the pulp. The incorporation of GO into the CH + BW matrix resulted in a more pronounced delay of fruit ripening, as evidenced by the lower depigmentation of the peel at eight days, with a lightness approximately 10.7% lower at 54.92, a chroma value 16.5% lower at 49.33, a hue angle 7.2% higher at 92.56, a soluble solid (SS) content 16.7% higher at 11.32°Brix, and an acidity 31.9% higher at 4.18% compared to the control. Furthermore, the biopolymer packaging led to a higher consumer acceptance score for the fruit. [ABSTRACT FROM AUTHOR]

Copyright of Storage & Process is the property of Tianjin Academy of Agricultural Sciences 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.)

This paper examines the concerns surrounding the adverse effects of fumigants on the quality of treated perishables. Fumigation is a widely used strategy in the food industry, particularly for exporters, to control insect pests in food commodities under storage. As global trade in perishables continues to expand, the balance between effective fumigation for pest control and preserving product quality becomes increasingly crucial. The selection of an appropriate fumigant is important for a successful export, as the chemical components present in the commodity can interact with the fumigant, leading to changes in flavour, taste, odour, nutritional value, and processing capabilities. Understanding these effects is crucial for optimizing fumigation strategies while maintaining the quality and safety of food commodities. This review provides an overview of the various fumigants used worldwide for fruits and vegetables and evaluates their impact on the quality of treated perishable commodities. [ABSTRACT FROM AUTHOR]

Sprouts, as an edible vegetable with rich nutrients and health care efficacy, have been increasingly favored by people in recent years. Plant hormones are intrinsic mediators of plant growth and development. The impacts of plant hormone treatment on the growth and quality of sprouts were summarized, and the potential mechanisms were briefly discussed. Moreover, this review explored prospective applications and investigations to promote the sprouts industry. Proper plant hormone treatment could promote the seed germination rate, hypocotyl growth, and fresh weight of sprouts. Meantime, appropriate plant hormone treatment could enhance the bioactive compound contents (such as total phenolic, pigments, and vitamins), antioxidant capacity, and anti-adipogenic and anti-diabetic activities of sprouts. Furthermore, hormones could delay the discoloration progress and promote the antioxidant capacity in sprouts, thus maintaining the postharvest quality. Although the impact of hormones on sprout quality is mainly dependent on the kind, dose, and treatment method of the hormone, the sprout species and cultivars, the growth phase, environmental factors, and others, plant hormone treatment is still a practical and prospective strategy in sprout industry to produce sprouts with enhanced growth and quality. [ABSTRACT FROM AUTHOR]

In this study, ‘Sabará’ jabuticaba fruit were stored at (5.0 ± 0.2) ℃ or near-freezing temperature ((0.0 ± 0.2) ℃), and evaluated for changes in quality attributes and antioxidant activity after 18 days. The results showed that compared with storage at 5 ℃, near-freezing temperature treatment could effectively reduce the rate of mass loss and decay rate, maintain the contents of soluble solids, titratable acid and vitamin C (VC), and inhibit the activities of pyruvate decarboxylase and ethanol dehydrogenase in the fruit. Moreover, near-freezing temperature treatment delayed the decrease in the contents of total phenols and flavonoids, improved the activity of superoxide dismutase (SOD), slowed down the decline in the activity of peroxidase (POD) and catalase (CAT), delayed the increase in superoxide anion radical (O2−·) production rate and hydrogen peroxide (H2O2) content, and retarded the accumulation of malondialdehyde (MDA) and the increase in the permeability of the cell membrane. Therefore, near-freezing temperature storage could delay ethanol fermentation and improve antioxidant properties of jabuticaba fruit, thereby maintaining its storage quality.

Very little is known about the preservation and storage of fresh medicinal and aromatic plants (MAPs) and/or herbs. As with many leafy vegetables, i.e., lettuce, fresh spearmint is a very perishable product throughout the production line and requires special handling/processing. The current study aimed to examine the antibacterial activity of selected MAPs (Origanum dubium, Salvia fruticosa and Sideritis cypria) grown in Cyprus towards foodborne pathogens. Then, the most effective MAPs' essential oil (EO) and hydrosol (at different doses; combination of concentration and time of dipping submerge) were tested to preserve fresh spearmint quality and safety. The results showed that O. dubium EO and hydrosol presented great in vitro antibacterial activity against four foodborne pathogens and those products were further selected for application on fresh spearmint. During sensory evaluation, it was observed that higher O. dubium EO concentrations and longer time of application resulted into a less marketable product (less acceptable with less spearmint-like aroma), while hydrosol resulted in a more marketable product even at high doses. In general, EO and hydrosol applications increased spearmint's antioxidants (including polyphenols, flavonoids, and ascorbic acid), resulting in a product of increased nutritional value. The bacterial populations of Salmonella enterica and Listeria monocytogenes inoculated on fresh spearmint were decreased with the EO and hydrosol application doses applied, and their effects were evident even after six days of storage at 4 °C. From the findings of this study, it can be concluded that O. dubium EO and hydrosol could be a potential sanitation method for fresh spearmint preservation. [ABSTRACT FROM AUTHOR]

Given the increasing challenges of water scarcity and the stringent quality requirements of the frozen potato-processing industry, this multi-year research trial aimed to determine whether reduced late-season irrigation on potatoes could improve French fry color. The study was conducted near Othello, WA, and was comprised of five irrigation levels: 40%, 60%, 80%, 100%, and 120% of modeled evapotranspiration (ET), and five potato cultivars: Alturas, Clearwater Russet, Ranger Russet, Russet Burbank, and Umatilla Russet. Irrigation treatments started 100 to 105 days after planting (DAP), approximately 1500 day degrees (at or near peak canopy growth), and ended at vine kill, 150 to 155 DAP. Fry color was assessed following storage durations of 45 and 90 days after harvest from three storage temperatures of 4.4 °C, 6.7 °C, and 8.9 °C, using a photovolt reflectometer, measuring percent light reflectance, in which higher values represented lighter fries. The study found that reducing late-season irrigation generally improved overall fry color. Fry color improvements were observed in four potato cultivars grown with 20% to 40% less irrigation than the control (100% ET); Ranger Russet exhibited no improvement. Reducing late-season irrigation by more than 40% resulted in darker fries for Clearwater Russet, Russet Burbank, and Umatilla Russet when tubers were stored at 4.4 °C and 6.7 °C. Excess irrigation, greater than 100% ET, generally darkened fries in Alturas, Clearwater Russet, Russet Burbank, and Umatilla Russet. These findings provide valuable guidelines for potato growers, indicating that while reducing late-season irrigation can enhance fry color, the effects may depend on a combination of cultivar, irrigation level, and storage temperature. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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.)

In the potato processing industry, the length-to-width (L/W) ratio of potato tubers is a critical quality indicator, especially for products like French fries and chips. Traditional measurement methods such as manual scales or calipers are labor-intensive and subject to variability. Addressing this challenge, we introduce a mobile application (Tuber Ruler) developed for Android smartphones, which employs image analysis to accurately measure the L/W ratio of potato tubers. By integrating standard image-processing and machine learning (ML) techniques, Tuber Ruler offers a dual-approach analysis, allowing for rapid and precise tuber sizing against both standard black and diverse natural backgrounds. The application exhibits acceptable performance metrics when compared to ground truth measurements obtained via digital calipers. Specifically, Tuber Ruler achieved a Pearson's correlation coefficient (r) of 0.98 and a mean absolute error (MAE) of 0.03 for russet potatoes, demonstrating consistent accuracy across diverse potato varieties (yellow tubers: r = 0.98, MAE = 0.02; red tubers: r = 0.91, MAE = 0.04). The app can be used in challenging natural environments such as soil and grass backgrounds. Moreover, Tuber Ruler maintains high accuracy (r ≥ 0.99, MAE = 0.01–0.04) even when image resolution is reduced to 25% of the original size, showcasing its resilience to resolution degradation. A significant aspect of Tuber Ruler is the effective use of ML to complement standard image-processing approach, enhancing the application's adaptability to varied backgrounds and tuber types. This dual-approach analysis, coupled with swift processing times (standard image-processing: 2.0 s; ML: 4.0 s), positions Tuber Ruler as an alternative to traditional sizing methods. By offering a scalable, precise, and user-friendly tool for tuber sizing, Tuber Ruler has the potential to significantly enhance productivity and operational efficiency in the potato industry, becoming a valuable tool to growers, processors and researchers. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department 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.)

BACKGROUND RESULTS CONCLUSION Food marketers desire residue‐free fresh grapes although grapes have a short postharvest life. This study was performed to determine the influences of pre‐ and/or postharvest chitosan (Ch) coatings on postharvest quality of minimally processed (stem‐detached) organic ‘Crimson Seedless’ berries. Berries were sorted as: (a) control (untreated berries); (b) preharvest Ch (dipping the clusters on the vine into 1% Ch 10 days before harvest at 20% soluble solid content (SSC)); (c) postharvest Ch (dipping the stem‐detached berries into 1% Ch); and (d) pre + postharvest Ch. Berries were stored in 12 × 15 cm rigid polypropylene cups for up to 42 days at 1.0 ± 0.5 °C.Pre‐ and/or postharvest Ch coating reduced weight loss during storage. Pre‐ + postharvest Ch was the best treatment for restricting polygalacturonase (PG) activity, extending the visual quality, color features (L*, C and h°), skin rupture force, biochemical (SSC, titratable acidity, maturity index and pH) and bioactive (total phenol content, antioxidant activity) features. Pre‐ or postharvest Ch was also significantly effective in maintaining many quality features.Pre‐ and/or postharvest 1% Ch coatings effectively maintained the quality of minimally processed grape berries of organically produced ‘Crimson Seedless’ grapes by delaying weight loss and PG activity and keeping the postharvest physical, biochemical and bioactive features for 42‐day cold storage at 1.0 ± 0.5 °C. The combined use of pre‐ and postharvest Ch found to be more effective than single treatment. Thus, pre‐ + postharvest 1% Ch coating could be recommended as an ecofriendly sustainable methodology for extending the postharvest quality of minimally processed fresh grapes. © 2024 The Author(s). Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Fruits and vegetables that exhibit a higher chlorophyll content, as reflected in their visual appearance, are the preferred choice of consumers. The study aimed to evaluate the effects of Light Emitting Diodes (LEDs) on the physical, chemical, and pigmentation quality of bitter gourd using white, blue, and red at 1.5 W/135 lumens (Foshan Electrical and Lighting Co., Ltd [FSL], China). Bitter gourd, with a short postharvest life of 4­5 days due to physical and chemical disorders, was harvested weighing 300–400 g and 25 x 5 cm from the farm and subjected to varying illuminations within a 4­hour period for five days, with measurements taken daily. Statistical differences between treatments were observed in physicochemical parameters such as fruit shrivelling, yellowing, visual appearance, weight loss, dry matter content, total chlorophyll, pH values, and TA. The quality and shelf­life of bitter gourd fruits were found to be improved by the white LED. The visual appearance was maintained, and fruit shrivelling and yellowing were delayed, with lower weight loss observed. Slight changes in chlorophylls and carotenoids, vitamin C, and a shelf­life of 5 days were recorded. [ABSTRACT FROM AUTHOR]

In this study, the effectiveness of preharvest fertigation using calcium thiosulfate (CaTS) and potassium thiosulfate (KTS) to enhance the shelf life of bell peppers was investigated. The nutrient solution was enriched with KTS (either 0.26 or 0.53 mM of a commercial formulation) or CaTS (0.66 mM of a commercial formulation), and compared to a commercial source-based nutrient solution as a control. Fruit quality attributes and the activity of key enzymes involved in oxidative stress defense, enzymatic browning, cell wall degradation, and membrane lipid degradation were investigated for 30 days of storage. Results showed that CaTS and KTS treatments preserved protein (a secondary energy reserve) and proline content, and enhanced the fruit's PSII activity throughout storage. Despite increased phenylalanine ammonia-lyase activity, CaTS and KTS fertigation did not affect polyphenol oxidase activity. CaTS and KTS fertigation increased the activity of five (out of seven) antioxidant enzymes and impaired the activity of one (out of two) cell wall hydrolytic enzyme. CaTS was the most effective treatment, followed by KTS (0.53 mM), in causing these promotive effects. In conclusion, preharvest application of CaTS (0.66 mM) and KTS (0.53 mM) prolonged the postharvest life and delayed senescence of bell pepper fruits by preserving fruit weight, firmness, and photosynthetic performance, as well as enhancing the antioxidant defense system.

This study aimed to evaluate the effect of silicon and acibenzolar-S-methyl sources on the development of yellow melon (Cucumis melo L.) in the field and the occurrence of diseases in different years. The treatments consisted ofthe silicon sources Agrosilício® (3 g L−1), Rocksil® (3 g L−1), and Chelal® Si (2 L 100 L−1), the additional treatments acibenzolar-S-methyl (ASM) (2 mM) and the fungicide thiabendazole (400 mL 100 L−1), and a control (sterile distilled water). The following characteristics were evaluated: natural incidence of diseases; gas exchange: CO2 assimilation rate, transpiration, stomatal conductance, internal CO2 concentration, water use efficiency, instantaneous water use efficiency, and carboxylation; postharvest aspects: fruit weight, pulp thickness, pulp firmness, titratable acidity, pH, soluble solids, and vitamin C content; productivity; and the enzymatic activity of peroxidases, polyphenol oxidases, and phenylalanine ammonia-lyase. No significant response was observed for naturally occurring diseases. Treatments with Chelal®Si, Rocksil®, and Thiabendazole® increased photosynthetic and transpiration rates in the yellow melon. The silicon and ASM sources did not influence the physicochemical characteristics or the enzymatic activity of fruits. No effect was observed on the biometric characteristics, productivity, and chemical quality of fruits in both years of cultivation. Si sources increased photosynthetic rate and transpiration. However, no diseases were observed during the experimental period. Leaf spraying with silicon and acibenzolar-S-methyl sources did not influence the biometric characteristics and fruit production of yellow melon. The silicon and acibenzolar-S-methyl sources did not induce an increase in the enzymatic activity of peroxidases, polyphenol oxidase, and phenylalanine ammonia-lyase. Fruit production was higher in 2020.

Rambutan (Nephelium lappaceum L.), an exotic non-climacteric tropical fruit in Bangladesh, has got wide acceptance to consumers as well as growers due to its attractive appearance, taste and nutrition, but the demerits of inadequate fruiting and yield as well as low edible properties at the farmers field requires to be addressed. Hence, an experiment was performed with gibberellic acid (GA3) and the obtained dataset demonstrates how GA3 application augmented the fruit set and retention, fruit yield and post-harvest biochemical properties of rambutan. Gibberellic acid was sprayed at seven various concentrations from 0 ppm (control) to 500 ppm at the mature panicles (inflorescence) during the pre-flowering and the early fruiting stages (three weeks after fruit set). The study was conducted in two sequential growing years (2020 and 2021) following a randomized complete block design (RCBD). Results revealed that 200–300 ppm doses had superiority over the lower (50–100 ppm) and higher (400–500 ppm) doses for promoting the fruit yield and quality. More specifically, fruit set and retention, fruit size and weight, pulp weight and thickness, pulp:peel ratio, edible portion and fruit yield as well as total soluble solids and total sugars contents in fruit were exhibited the best at 300 ppm being consonant with 200 ppm at majority cases, whereas GA3 doses from 200 ppm to 500 ppm performed similarly to enhance fruit physico-chemical qualities and shelf life of rambutan. Control treatment along with 50 ppm gibberellic acid dose demonstrated inferior results for yield and fruit quality promotion of rambutan. Thus, use of plant growth regulator at appropriate dose and time is imperative to rambutan improvement.

Fruits and vegetables that exhibit a higher chlorophyll content, as reflected in their visual appearance, are the preferred choice of consumers. The study aimed to evaluate the effects of Light Emitting Diodes (LEDs) on the physical, chemical, and pigmentation quality of bitter gourd using white, blue, and red at 1.5 W/135 lumens (Foshan Electrical and Lighting Co., Ltd [FSL], China). Bitter gourd, with a short postharvest life of 4-5 days due to physical and chemical disorders, was harvested weighing 300–400 g and 25 x 5 cm from the farm and subjected to varying illuminations within a 4-hour period for five days, with measurements taken daily. Statistical differences between treatments were observed in physicochemical parameters such as fruit shrivelling, yellowing, visual appearance, weight loss, dry matter content, total chlorophyll, pH values, and TA. The quality and shelf-life of bitter gourd fruits were found to be improved by the white LED. The visual appearance was maintained, and fruit shrivelling and yellowing were delayed, with lower weight loss observed. Slight changes in chlorophylls and carotenoids, vitamin C, and a shelf-life of 5 days were recorded.

This document is an editorial published in the journal Frontiers in Plant Science. It discusses the quality of ornamental crops and the impact of various factors on their attributes. The editorial emphasizes the importance of innovation, technology, and sustainability in ornamental plant production. It summarizes the findings of 10 research and review articles, covering topics such as urban green spaces, germplasm characterization, and advances in cut flowers. The document highlights the need for further research in these areas and mentions a related article in the same journal for additional information. [Extracted from the article]

Abstract Gray mold caused by Botrytis cinerea is a serious disease of grape (Vitis vinifera) during storage. The aim of this study is to evaluate the effect of atmosphere cold plasma (a novel and nonthermal technology) on inactivation of B. cinerea and preservation of chemical, physical, and mechanical characteristics of grape inoculated with B. cinerea. Herein, different time of cold plasma (0, 10, 20, and 40 s) was firstly considered to be the main factors, besides different storage time (1, 2, 3, 4, and 5 weeks) at 4°C. According to the results, plasma treatment exhibited inhibitory effect on gray mold percentage and microbial load of B. cinerea (log CFU g−1) during postharvest storage. So, in the last week, the gray mold percentage and microbial load in the control were 100% and 3.6 log CFU g−1, and in 40‐s plasma were 4.5% and 2.53 log CFU g−1, respectively. Although the minimum infection and microbial load were observed in 40‐s plasma, better postharvest quality preservation was observed in short‐time cold plasma treatment (≤20 s). Forty‐second plasma caused fruit tissue destruction and negatively decreased mechanical indices (Emod: 0.0028, Fmax = 1.78, and W = 3.18) and weight loss (91.9) in comparison with ≤20‐s plasma, in which mechanical indices (Emod =0.0077, Fmax = 3.6, and W = 10.06) and weight loss (1/1) were higher. The long‐time cold plasma treatment (40 s) had also maximum effects on color changes (10) and surface temperature (2.8°C). Although the highest TSS and TA were observed in 40‐s Plasma, but different time of plasma treatments had no effect on pH. Altogether, these results indicate that the short‐time cold plasma treatment can inactivate B. cinerea on grape berries and preserve crop quality properties.

Onions are produced and consumed in large amounts all over the world. Even though the dry onion bulb is well suited to storage, significant losses occur due to sprouting and diseases during the storage period. The objective of this study was to find methods to support decision-making in storage and prevent some of these losses. Three onion cultivars were tested during two storage seasons, and quality indicators such as firmness, sugar content, dry matter content and mineral content were measured. All but one of the samples were treated with maleic hydrazide for sprouting inhibition. Contents of fructose and glucose were found to be connected to the extent of sprouting, with the highest contents coinciding with the onset of sprouting in spring. Firmness and dry matter losses differed between samples from different growing conditions with firmness losses up to 35.2% and dry matter losses between 4.9% and 11.1% found. Dry matter content was significantly connected to the fraction of sprouted bulbs in a sample. While firmness had a decreasing trend for all but one sample, the firmness measurements carried out with a handheld penetrometer were not consistent enough to be a reliable indicator of sprouting.

Abstracts: Several pre-cooling methods for bok choi were used, such as natural convection pre-cooling (NCPC), strong wind pre-cooling (SWPC), vacuum pre-cooling (VPC), cold water pre-cooling (CWPC), electrolyzed water pre-cooling (EWPC), and fluid ice pre-cooling (FIPC), in order to determine the most suitable precooling method. It was found that VPC reduced the respiration rate, inhibited the increase of malondialdehyde (MDA) and relative electrolyte leakage, and significantly decreased the total bacterial count. This may be due to the rapid decompression process during vacuum pre-cooling, which disrupts the microbial structure and has a certain sterilizing effect. Bok choi pre-cooled by VPC had the best color, hardness value, chlorophyll, titratable acid (TA) content, vitamin C (VC) content, total phenolic (TP) content, soluble sugar content, superoxide dismutase (SOD) activity, ascorbate peroxidase (APX) activity, and catalase (CAT) activity. Therefore, the most suitable pre-cooling method for bok choi among the above pre-cooling methods was the VPC method.

Apples are one of most economically important crops worldwide with a production of approximately 96 million tons in 2022. During postharvest storage, apple quality can decline due to the development of physiological disorders. Superficial scald is one of the main physiological disorders that develops in apples during cold storage and results in quality deterioration. Superficial scald is controlled by synthetic antioxidants such as diphenylamine (DPA) and ethoxyquin. Both chemicals have been banned from the EU due to their toxicity. The current review provides an update on superficial scald complicated development mechanism and summarizes studies investigating postharvest treatments as alternatives to DPA and ethoxyquin. Ethylene and oxygen are important factors that trigger the development of superficial scald in apples by regulating various metabolic pathways during cold storage. More studies are required to investigate alternatives to synthetic antioxidants and elucidate the contribution level of the different metabolites to superficial scald development.

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Fleshy fruit ripening is a unique biological process that involves dramatic changes in a diverse array of cellular metabolisms. The regulation of these metabolisms is essentially mediated by cellular signal transduction of internal (e.g., hormones) and external cues (i.e., environmental stimuli). Mitogen-activated protein kinase (MAPK) signaling pathways play crucial roles in a diverse array of biological processes, such as plant growth, development and biotic/abiotic responses. Accumulating evidence suggests that MAPK signaling pathways are also implicated in fruit ripening and quality formation. However, while MAPK signaling has been extensively reviewed in Arabidopsis and some crop plants, the comprehensive picture of how MAPK signaling regulates fruit ripening and quality formation remains unclear. In this review, we summarize and discuss research in this area. We first summarize recent studies on the expression patterns of related kinase members in relation to fruit development and ripening and then summarize and discuss the crucial evidence of the involvement of MAPK signaling in fruit ripening and quality formation. Finally, we propose several perspectives, highlighting the research matters and questions that should be afforded particular attention in future studies. [ABSTRACT FROM AUTHOR]

Gray mold caused by Botrytis cinerea is a serious disease of grape (Vitis vinifera) during storage. The aim of this study is to evaluate the effect of atmosphere cold plasma (a novel and nonthermal technology) on inactivation of B. cinerea and preservation of chemical, physical, and mechanical characteristics of grape inoculated with B. cinerea. Herein, different time of cold plasma (0, 10, 20, and 40 s) was firstly considered to be the main factors, besides different storage time (1, 2, 3, 4, and 5 weeks) at 4°C. According to the results, plasma treatment exhibited inhibitory effect on gray mold percentage and microbial load of B. cinerea (log CFU g−1) during postharvest storage. So, in the last week, the gray mold percentage and microbial load in the control were 100% and 3.6 log CFU g−1, and in 40‐s plasma were 4.5% and 2.53 log CFU g−1, respectively. Although the minimum infection and microbial load were observed in 40‐s plasma, better postharvest quality preservation was observed in short‐time cold plasma treatment (≤20 s). Forty‐second plasma caused fruit tissue destruction and negatively decreased mechanical indices (Emod: 0.0028, Fmax = 1.78, and W = 3.18) and weight loss (91.9) in comparison with ≤20‐s plasma, in which mechanical indices (Emod =0.0077, Fmax = 3.6, and W = 10.06) and weight loss (1/1) were higher. The long‐time cold plasma treatment (40 s) had also maximum effects on color changes (10) and surface temperature (2.8°C). Although the highest TSS and TA were observed in 40‐s Plasma, but different time of plasma treatments had no effect on pH. Altogether, these results indicate that the short‐time cold plasma treatment can inactivate B. cinerea on grape berries and preserve crop quality properties. [ABSTRACT FROM AUTHOR]

Social Impact Statement: Tomato fruit is an important and popular commodity producing $95.62 billion worldwide. Tomato fruit losses in the supply chain vary between 25% and 42% depending on the production area and the availability of postharvest technologies. For many decades, conventional tomato breeding programs have focused on extending the shelf‐life of fresh‐market varieties. However, in many instances, consumer‐based quality traits were not considered a priority. Consumers are now demanding safe, nutrient‐rich, high‐flavor, and convenient fruit. Here, we demonstrate the use of gene editing to improve fruit shelf‐life and positively impact quality, which can help significantly reduce tomato fruit losses and meet consumer expectations. Summary: Finding alternative ways to extend tomato fruit shelf‐life without reducing the quality is critical to ensure the accessibility and likeability of this commodity worldwide. Improving fruit firmness in tomato fresh‐market varieties directly impacts their shelf‐life potential. We simultaneously knocked out two pectin‐degrading enzymes, polygalacturonase (SlPG2a) and pectate lyase (SlPL), key for tomato fruit softening. We expected this gene‐editing approach to result in longer‐lasting fruit without negatively impacting consumer‐based quality attributes.By generating the double clustered regularly interspaced short palindromic repeats (CRISPR) knockout PGPL, we evaluated the combined functions of SlPG2a and SlPL on fruit quality, including shelf‐life attributes like firmness and water loss, fruit marketability, and disease incidence. We also assessed additional attributes impacting consumer acceptance, such as taste and aroma.We revealed that the enzymes SlPG2a and SlPL act additively, significantly impacting fruit firmness and shelf‐life, with the double CRISPR knockout PGPL outperforming the wild‐type fruit. Additionally, fruit quality traits, such as sugar: acid ratio, aroma volatiles, and skin color, were improved or not affected in the double CRISPR knockout PGPL compared to the wild‐type.The discoveries of this research provide new insights into the influence of pectin backbone degradation on fruit physiology and postharvest quality, which can be used in crop improvement programs to make fruit more resilient in the supply chain without compromising quality. [ABSTRACT FROM AUTHOR]

Plasma-activated water (PAW) treatment is an effective technique for the quality retention of fresh vegetables with cold atmospheric plasma using controllable parameters. This study investigated the effect of PAW on the postharvest quality of shepherd's purse (Capsella bursa-pastoris). The results displayed that PAW treatment with an activation time of 5, 10, 15, and 20 min reduced the yellowing rate and weight loss of the shepherd's purse during 9 days of storage. Compared with untreated samples, PAW treatment at different times reduced the number of total bacteria, coliform, yeast, and mold by 0.18–0.94, 0.59–0.97, 0.90–1.18, and 1.03–1.17 Log CFU/g after 9 days of storage, respectively. Additionally, the treatments with PAW-5 and PAW-10 better preserved ascorbic acid, chlorophyll, total phenol, and total flavonoid contents. They also maintained the higher antioxidant and CAT activity and inhibited the formation of terpenes, alcohols, and nitrogen oxide compounds of the shepherd's purse at the end of storage. The microstructural result illustrated that the cells of the shepherd's purse treated with PAW-5 and PAW-10 were relatively intact, with a small intercellular space after storage. This study demonstrated that PAW treatment effectively improved the postharvest quality of shepherd's purse. [ABSTRACT FROM AUTHOR]

Growing concerns over synthetic plastic pollution have spurred interest in biodegradable food packaging. Starch edible films are an eco-friendly alternative that can enhance the shelf life of fruits and vegetables thanks to their excellent oxygen barrier properties. Nonetheless, Starch edible films have several disadvantages, such as low water resistance and poor mechanical properties. Modifying starch through reactive extrusion, particularly succinylation, offers a solution. Therefore, this research aims to prepare edible films using starch modified by succinylation with different safe-food-use degrees of substitution (DS, 0–0.05) through the extrusion process and Glycerol Content (GC, 15–30%). The succinylated starch edible films' (SSEF) functional properties and their effectiveness as a coating for mango preservation were evaluated. Results show that as the DS increased, SSEF had lower barrier properties and higher mechanical properties. Additionally, mangoes coated with SSEF exhibited better postharvest quality (weight loss, ΔE, firmness, pH, TA, and °Brix) than control fruit. [ABSTRACT FROM AUTHOR]

Sulfur dioxide (SO2) fumigation was evaluated for efficacy against western flower thrips (Frankliniella occidentalis) and phytotoxicity to four select fresh fruits and vegetables. Western flower thrips were found to be very susceptible to SO2 fumigation. Fumigations with 0.3 and 0.5% SO2 for 60 and 30 min, respectively, at a low temperature of 5 °C achieved 100% thrips mortality. Broccoli, bell peppers, apples, and navel oranges with thrips were subjected to 30 min fumigation with 0.3–0.5% SO2 to verify efficacy and determine potential phytotoxicity. The fumigation resulted in complete control of thrips. Its effects on visual quality of fresh produce varied. The fumigation caused severe discoloration of broccoli. However, the treatment did not have significant effects on the color of other products. No negative impact on visual appearance of bell peppers and navel oranges was observed. However, it caused darkened lenticels on green apples and, therefore, may potentially degrade apple postharvest quality. The lack of phytotoxicity of SO2 fumigation is likely due to well-developed wax layers on those fresh products. The results of the study suggest that SO2 fumigation has good potential to be used safely and effectively against sensitive pests on select fresh fruit and vegetables including peppers and citrus fruits. [ABSTRACT FROM AUTHOR]

Asparagus (Asparagus officinalis L.) has short shelflife due to the high metabolic activity of the apical meristems. Storage at low temperature and high relative humidity is used commercially to keep fresh asparagus spears. Techniques denominated "Hurdley technologies" (UVC or gamma irradiation) have been tested in fruits and vegetables to extend postharvest life. These technologies were used to extend postharvest shelf life of asparagus spears by inhibition of meristematic activity. Spears were irradiated with UVC at dosages of 2.46, and 4.93 kJ m2 and gamma irradiation at 1 and 1.5 kGy, before storage at 2°C and 90% relative humidity (RH) for 20 days. Metabolic heat (Rq) was measured in apical meristems, as well as whole spear respiration, sugars content, water potential components and color descriptors. Metabolic heat and whole spears respiration rate did not show differences due to effect of UVC treatments, while spears treated with gamma radiation showed a metabolic activity inhibition of 10 and 15% for 1 and 1.5 kGy, respectively, while whole spear respiration rate was not affected. Changes in color variables showed a slight reduction in gloss. Sugars content in UVC remained unchanged, while gamma radiation induced a reduction in glucose. An increase in fresh weight loss was noticeable on those treated with gamma irradiation. No changes in water potential components were observed. It was concluded the treatments used did not reported positive benefits in extending asparagus spears shelf life. [ABSTRACT FROM AUTHOR]

The effectiveness of an alginate/chitosan nanomultilayer coating without (NM) and with Aloe vera liquid fraction (NM+Av) was evaluated on the postharvest quality of tomato fruit at 20 °C and 85% relative humidity (RH) to simulate direct consumption. Both nanomultilayer coatings had comparable effects on firmness and pH values. However, the NM+Av coating significantly reduced weight loss (4.5 ± 0.2%) and molds and yeasts (3.5–4.0 log CFU g−1) compared to uncoated fruit (16.2 ± 1.2% and 8.0 ± 0.0 log CFU g−1, respectively). It notably lowered O2 consumption by 70% and a 52% decrease in CO2 production, inhibiting ethylene synthesis. Visual evaluation confirmed NM+Av's efficacy in preserving the postharvest quality of tomato. The preservation of color, indicated by the Minolta color (a*/b*) values, demonstrated NM+Av's ability to keep the light red stage compared to uncoated fruit. The favorable effects of NM+Av coating on enhancing postharvest quality indicates it as a potential alternative for large-scale tomato fruit preservation. [ABSTRACT FROM AUTHOR]

Kiwifruit exhibits a climacteric ripening pattern and has as an extremely perishable nature. Considering that high perishability leads to a loss in antioxidants and overall nutritional quality. This study aimed to examine the efficacy of enhanced freshness formulation (EFF), a hexanal-based formulation containing antioxidants such as geraniol, α-tocopherol and ascorbic acid, on maintaining the bioactive compounds of gold kiwifruit (cv. ‘Y368’) harvested at two maturity stages. Kiwifruits were treated with three treatments, namely, control (untreated fruit), 0.01 and 0.02% (v/v) EFF. Fruits were treated with 8  weeks of cold storage at 0°C and 90% relative humidity, then transferred to 20°C for 8  days. Three bioactive compounds (ascorbic acid, total phenolics and flavonoids), antioxidant capacities using DPPH and FRAP assays, polyphenol oxidase, ascorbate oxidase, phenylalanine and tyrosine ammonia lyase enzyme activities were evaluated. The results showed that EFF significantly (p  <  0.05) influenced bioactive compounds, antioxidant capacities and the activity of enzymes involved in the synthesis and oxidation of bioactive compounds. The maturity stage significantly influenced the content of bioactive compounds. Later harvested kiwifruit had greater content of bioactive compounds, compared to earlier harvested kiwifruit. The total phenolic content was 0.77, 1.09 and 1.22  mg GAE g−1 FW for control, 0.01 and 0.02% EFF, respectively. The FRAP antioxidant concentration was 0.76, 0.91 and 0.96  μmol Fe (II) g−1 FW for control, 0.01 and 0.02% EFF. The findings illustrate the capacity of EFF to optimize bioactive compounds and storability of kiwifruit during postharvest storage. [ABSTRACT FROM AUTHOR]

Guava (Psidium guajava L.) is an important economic crop grown widely in tropical and subtropical regions. Guava exhibits fast ripening and senescence as a climacteric fruit, causing a short shelf life and quality deterioration. Chitosan–essential oil nanoemulsions can be an edible coating used to improve postharvest quality attributes. In this study, chitosan was mixed with carvacrol to generate a nano-emulsoid solution containing 0.1 and 0.2% (v/v) carvacrol, using a sonic dismembrator. Guava fruit were coated with the above emulsion and postharvest quality parameters were measured during storage at 20 ± 1 °C and RH = 80 ± 5% for 8 days. The result illustrated that the particle size of the chitosan–carvacrol emulsions was nanoscale, and their high stability was demonstrated by the zeta potential and polydispersity index. Chitosan coating (2%, w/v, 310–375 kDa) containing 0.2% (v/v) carvacrol maintained postharvest quality compared to chitosan alone, with higher firmness, soluble solid content, total acid, and total phenol content, and lower weight loss and pericarp browning. The collective data were further verified by principal component analysis. A chitosan coating containing carvacrol can reduce postharvest losses. It can be applied as an effective strategy to improve postharvest fruit quality. [ABSTRACT FROM AUTHOR]

India is renowned for its mango diversity, with more than 1000 genotypes reported. However, the Himalayan plains bear some elite genotypes which supposed to bear high postharvest value, the systemic postharvest study of which is yet to be attempted. The aim of present study is to evaluate the postharvest quality and ripening behviour of these important genotypes. Thus, 15 un-explored mango genotypes of this region were selected and evaluated for ripening behaviour and detailed postharvest profiling via internal (total phenolic and total flavonoid content), nutritional attributes (Brix: acid ratio, total carotenoid concentration, ascorbic acid content and antioxidant activity), sensory evaluation, fruit softening enzymes (polygalactouronase, pectin methylesterase and lipoxygenase), shelf life attributes (respiration rate, physiological loss in weight and storage life in days) external attributes (fruit weight, fruit firmness, peel thickness, fruit shape and dry seed weight) and mineral contents (Calcium, potassium and phosphorous) under ambient storage (25 ± 4 °C and 65 ± 5 % RH). The results revealed that the highest total flavonoid content (682.40 μg g−1), ascorbic acid (46.88 mg 100 g−1) and antioxidant activity (4.84 μmol TE g−1) exhibited by ‘Sukul’. The total phenolic content was recorded as the highest in ‘Safed Malda’ (510.42 μg GAE g-1 FW), and total carotenoid concentration was recorded as the highest in ‘Sipiya’ (7.30 mg 100 g-1) ‘Zardalu’ (7.04 mg 100 g-1) and ‘Mithua’ (6.98 mg 100 g-1). Interestingly, genotypes such as ‘Sukul’, Sipiya’ and ‘Krishna Bhog ‘exhibited a 4–5 days higher storage life than other selected genotypes. Screened genotypes exhibited a high diversity of nutritional and biochemical contents. The results of this study bear practical utility for research (quality improvement programme) and the processing industry.

This study investigated the regulation effect of magnetic field combined with low temperature storage on postharvest quality and cell wall pectic-polysaccharide degradation of wampee stored for 15 d at 4 °C and 15 °C. Results showed that magnetic field combined with low temperature storage reduced browning rate of fruit after 15 d storage, but its effect on weight loss rate and total soluble solids (TSS) did not surpass that of storage temperature. Interestingly, contents of flavonoid, total phenols and malondialdehyde (MDA) were also lowered at varying degrees by combined treatment. Furthermore, molecular weight distribution and monosaccharide compositions of cell wall pectic-polysaccharides were also affected, which resulted from the coordinated action of cell wall pectin-degrading enzymes. The activities of these enzymes during storage, including polygalacturonase (PG), pectin methylesterase (PME) and β-galactosidase (β-Gal) in treated wampee decreased. These findings suggested that magnetic field combined with low temperature storage was an effective technology and had great potential in preservation of postharvest wampee in future.

This study investigated the impact of varying calcium chloride (CaCl2) and salicylic acid (SA) concentrations on the growth, biochemical, and postharvest quality of Alstroemeria ‘Orange Queen’ flowers. A completely randomized factorial design (CRD) with two factors and three replications was employed. The first factor involved foliar application of 0, 75, 150, or 225 mg L-¹ CaCl2, while the second factor consisted of 0, 150, 300, or 450 mg L-¹ SA. Morphological characteristics (number of leaves, leaf fresh and dry weight, number of florets) and biochemical parameters (photosynthetic pigment content, soluble sugar content) were evaluated. Additionally, postharvest traits (relative fresh weight, relative solution uptake, malondialdehyde content, catalase and ascorbate peroxidase activity) were assessed. The highest fresh and dry weights and the greatest number of florets were observed in Alstroemeria treated with 225 mg L-¹ CaCl and 450 mg L-¹ SA. This combination also improved the flowers’ postharvest quality. Photosynthetic pigment content was significantly enhanced by both CaCl2 and SA, while malondialdehyde content was reduced compared to the control. Antioxidant enzyme activity was significantly increased following the application of CaCl and SA. Foliar application of 225 mg L ¹ CaCl and 450 mg L-¹ SA promoted the growth, biochemical composition, and postharvest quality of Alstroemeria ‘Orange Queen’ flowers. This treatment improved flower size, number, and enhanced their resistance to stress, suggesting its potential for enhancing the commercial value of this cultivar.

Asparagus (Asparagus officinalis L.) has short shelf-life due to the high metabolic activity of the apical meristems. Storage at low temperature and high relative humidity is used commercially to keep fresh asparagus spears. Techniques denominated “Hurdley technologies” (UV-C or gamma irradiation) have been tested in fruits and vegetables to extend postharvest life. These technologies were used to extend postharvest shelf life of asparagus spears by inhibition of meristematic activity. Spears were irradiated with UV-C at dosages of 2.46, and 4.93 kJ m-2 and gamma irradiation at 1 and 1.5 kGy, before storage at 2°C and 90% relative humidity (RH) for 20 days. Metabolic heat (Rq) was measured in apical meristems, as well as whole spear respiration, sugars content, water potential components and color descriptors. Metabolic heat and whole spears respiration rate did not show differences due to effect of UV-C treatments, while spears treated with gamma radiation showed a metabolic activity inhibition of 10 and 15% for 1 and 1.5 kGy, respectively, while whole spear respiration rate was not affected. Changes in color variables showed a slight reduction in gloss. Sugars content in UV-C remained unchanged, while gamma radiation induced a reduction in glucose. An increase in fresh weight loss was noticeable on those treated with gamma irradiation. No changes in water potential components were observed. It was concluded the treatments used did not reported positive benefits in extending asparagus spears shelf life.