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Background and aims: The plant's roots and fungi establish symbiotic endophytic associations that can coexist: arbuscular mycorrhizae and "dark septate" endophytes. Ferns and lycophytes are vascular plants that can form both fungal symbioses. The objective of this work is to detect the presence of fungal root endosymbiosis, know the mycorrhizal status, and analyze the type of colonizationin in native and ornamental ferns from the "Sierras Centrales de San Luis". M&M: In three sites in the "Sierras Centrales de San Luis", 9-10 individuals of each studied species were collected, their roots were processed to study these fungal. Characterization and quantification of their root colonization was evaluated. Results: In the three sites studied, Anemia tomentosa var. anthriscifolia formed mycorrhizal associations, the colonization presented abundant hyphal and arbusculated intracellular coils. In addition, glomoid spores of mycorrhizal fungi were found in their rhizospheres. Dark septate endophytes were absent in all species analyzed, none hyphae neither microsclerotia were recorded in roots of these native medicinal ferns. Conclusions: The mycorrhizal status of Anemia tomentosa var. anthriscifolia, one of the five medicinal fern species from the Sierras Centrales de San Luis studied, is presented. The arbuscular mycorrhizal colonization is described and quantified, and its type is determined as Paris. None of the fern species studied was associated with dark septate endophytes. [ABSTRACT FROM AUTHOR]

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Introducción y objetivos: El estatus de la presencia de hongos micorrícicos arbusculares (HMA) en licofitas y helechos se ha analizado en un 11 %. El objetivo de este trabajo es caracterizar y cuantificar la colonización de los HMA y caracterizar endófitos septados en raíces de las Thelypteridaceae: Amauropelta jujuyensis, A. nubicola y Pelazoneuron patens. M&M: Se recolectaron 10 individuos por especie en agosto del 2022. La colonización se estimó utilizando técnicas y tinción convencionales. Resultados: Las raíces de Amauropelta jujuyensis, A. nubicola y Pelazoneuron patens presentaron HMA de tipo morfológico Arum y Paris, simultáneamente. La colonización hifal no mostró diferencia significativa entre las especies, la arbuscular evidenció un porcentaje significativo mayor en A. jujuyensis y la vesicular fue mayor en A. nubicola. Además, se evidenciaron endófitos septados en las especies analizadas del género Amauropelta. Conclusiones: Se evidencia, por primera vez en ambientes riparios de las Yungas, la asociación de los HMA y otros endófitos fúngicos con Amauropelta jujuyensis, A. nubicola y Pelazoneuron patens. Se demuestra en estas la coexistencia de los tipos morfológicos Arum y Paris.

Introducción y objetivos: Las raíces de las plantas y los hongos establecen asociaciones simbióticas endofíticas que pueden coexistir: las micorrizas arbusculares y los endófitos “septados oscuros”. Los helechos y licófitos son plantas vasculares que pueden formar ambas simbiosis fúngicas. El objetivo de este trabajo es detectar la presencia de endosimbiosis radicales fúngicas, conocer el status micorrícico y analizar el tipo de colonización radical en helechos nativos y ornamentales de las Sierras Centrales de San Luis. M&M: En tres sitios de las Sierras Centrales de San Luis, se recolectaron 9-10 individuos de cada especie estudiada y sus raíces fueron procesadas para el estudio de estas endosimbiosis fúngicas, la cuantificación y caracterización de la colonización radical. Resultados: En los tres sitios estudiados, Anemia tomentosa var. anthriscifolia formó asociaciones micorrícicas y la colonización radical presentó abundantes circunvoluciones hifales y arbusculadas intracelulares. Además, se hallaron esporas glomoides de hongos micorrícicos en sus rizósferas. Los endófitos septados oscuros estuvieron ausentes en todas las especies analizadas. Conclusiones: Se da a conocer el status micorrícico de Anemia tomentosa var. anthriscifolia, una de las cinco especies de helechos medicinales de las Sierras Centrales de San Luis estudiadas. Se describe y cuantifica la colonización micorrícico arbuscular, determinándose su tipo como Paris. Ninguna de las especies de helechos estudiadas estuvo asociada con endófitos septados oscuros

Copyright of Revista Ciencia y Tecnología Agropecuaria is the property of Agrosavia 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.)

Copyright of Lilloa is the property of Fundacion Miguel Lillo 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.)

The integration of beneficial microorganisms into agricultural systems can improve crop resistance to stress and increase yields. We studied tomato (Solanum lycopersicum) production in a greenhouse experimental trial over a complete growing season. The experimental design involved three factors: irrigation condition (normal/low), addition of the arbuscular mycorrhizal fungi Funneliformis mosseae (with/without), and inoculation with four native soil yeasts (Candida aff. ralunensis; Candida sake; Lachancea nothofagi and Candida oleophila). Co-inoculation of F. mosseae and yeasts did not affect the tomato plants. Addition of F. mosseae increased mycorrhizal colonization and production variables regardless of irrigation level; however, its effects on growth were variable. None of the inoculated yeasts increased mycorrhizal colonization. C. aff. ralunensis and C. oleophila inoculation increased stem diameter under all conditions studied. C. aff. ralunensis inoculation enhanced fruit set and the fruit/flower ratio under normal irrigation conditions, while C. sake inoculation increased the fruit/flower ratio under low irrigation conditions. Arbuscular mycorrhizae inoculation is presented as a beneficial production strategy to increase plant tolerance and improve water use. We propose that C. aff. ralunensis and C. oleophila inoculation improves plant vigor. Highlights: • Tomato production under greenhouse conditions was studied during a complete growing season following a three-factor trial: irrigation condition (normal/low), addition of arbuscular mycorrhizal fungi and inoculation with four native soil yeasts. • Addition of arbuscular mycorrhizal increased mycorrhizal colonization and production variables regardless of irrigation level. • Inoculation with two of the yeasts studied increased stem diameter under all conditions studied. • Utilizing indigenous microorganisms could represent a promising alternative to external inoculants, potentially cutting down production costs and eliminating the necessity of introducing foreign microorganisms into the environment.

The research was carried out at the "Los Palacios" Urban Farm, belonging to the Cubaquivir Agroindustrial Company where a Ferrallitic Yellowish Leach Petroferric soil predominates with the aim of evaluating the effect of the biofertilizer EcoMic® application in the cultivation of the bean cv. Canton in two different production systems. Biofertilizers was applied at a dose of 10 % based on the seed mass before sowing by the coating method. In the intensive production area two plots of 0.25 ha were planted. One with seed treated with the biofertilizer (MA) and the other untreated (noMA) and in the organoponic two beds of 10 m long x 1.20 m Wide. The percentage of mycorrhizal colonization, plant height, number of pods per plant, pod length, number of seeds per pod and agricultural yield were evaluated in both treatments and production systems. It was obtained as a result that in the treatments with EcoMic®, the plant height increased, the number of pods per plant, the length of the pods, the number of seeds per pod and the agricultural seed yield between 15 and 23 %. The greatest increases in the growth and development of bean plants were obtained under organoponic conditions. [ABSTRACT FROM AUTHOR]

Bioestimulants contribute to increase yield reflected in fruits. In this sense, a study was carried out at the Institute of Tecomatlan, Puebla, Mexico, to evaluate the influence of the Quitomax® use and the inoculation with two strains of mycorrhizae in the behavior of some variables of fruit. Seedlings were produced in trays with a commercial substrate, under the same treatments that would later be applied in field conditions, which consisted of a control where seeds were soaked in water three hours, the same time and application form, when mycorrhizae were used, and Quitomax solution. The two mycorrhizal inoculants were applied by coating the seeds. Six treatments were established since both bioestimulants were also used in combination. A randomized block design was used in the field whit four replications. At transplantation time, each inoculum was applied at root system and Quitomax® was sprayed on the foliage at seven and 28 days. The quantity of fruits per plant was evaluated and in the sixth harvest, 30 fruits were taken at random per replication of each treatments, from which the equatorial and polar diameter were measured. Treatments caused variations in the distribution of fruits by size and in the equatorial diameter, but not in the fruit shape. The number of fruits increased with respect to the control, but not their mass to the same extent. [ABSTRACT FROM AUTHOR]

El uso de microorganismos ha sido una alternativa para promover el crecimiento y biocontrol de plagas y enfermedades en diversos cultivos y agave. En este trabajo se estudió la inoculación de bulbilos de Agave tequilana con distintas micorrizas arbusculares sobre el crecimiento y control de la marchitez causada por Fusarium oxysporum. En invernadero, se inocularon bulbilos de Agave con el consorcio nativo “Barranca de las Nueces”, un inóculo comercial de esporas de Rhizofagus y un control sin micorriza. Después de cuatro meses de micorrización, se registró un incremento del 31 % en biomasa fresca y 61 % en altura de bulbilos micorrizados respecto al tratamiento sin micorrizar; además, de un 28 % de colonización micorrízica en los tratamientos micorrizados. A los 120 días después de la micorrización, un grupo de plantas se infectó con Fusarium oxysporum y cien días después se registró el crecimiento y el control de la enfermedad. Los resultados mostraron solo efecto significativo de la micorrización sobre el crecimiento de los bulbilos y aquellos con el inóculo comercial presentaron el mayor crecimiento. Respecto al control contra Fusarium oxysporum, todas las plantas infectadas mostraron un nivel de medio a severo de acuerdo con la escala generada. Los resultados mostraron una promoción en crecimiento de los bulbilos por la micorrización; sin embargo, no se logró evidenciar algún tipo de control contra la enfermedad, al menos a nivel foliar. Los hongos micorrízicos arbusculares promueven el crecimiento de bulbilos de agave y podrían aminorar el daño de enfermedades en esta especie.

The objective of the research was to determine the effect of biochar enriched with worm humus and arbuscular mycorrhizal fungi (AMF) on growth and galling of yam plants and M. incognita reproduction. The study was developed under semi-controlled conditions in a biological isolator of the Instituto de Investigaciones de Viandas Tropicales (INIVIT), Santo Domingo, Villa Clara Province, Cuba, in 2022. A completely randomized design with seven replicates was used. The treatments consisted of different combinations of soil, biofertilizers, and biochar, with and without inoculation of a pure population of M. incognita established at the institute. The best development of yam plants was obtained in the treatment where, in the absence of M. incognita, the plants were grown in a substrate containing a mixture of biochar + humus and mycorrhizae as inoculant. It was evident that M. inognita parasitism affected the development of the cultivar 'INIVIT Ñ-2008' because of the decreases produced in plant stem length and fresh and dry matter of the foliar part. The potentialities of incorporating AMF, humus, and biochar in the production technology of D. alata were evidenced by the positive effects on plant growth and development and reduction of M. inognita galling index and reproduction on this cultivar, which was cataloged as a good host and susceptible to this nematode; results which will be corroborated in subsequent field studies. [ABSTRACT FROM AUTHOR]

The association of roots with mycorrhizal fungi increases the establishment success of forest species. Cordilleran cypress naturally forms associations with arbuscular mycorrhizae (AM). In general, the use of fertigation and artificial growth methods causes a decrease in mycorrhization, which could lead to a decrease in seedling performance in the field. The objectives of this study were: to determine whether AM colonization occurs in a nursery; to evaluate the influence of differing availability of phosphorus and substrate water status on the level of mycorrhizal colonization during plant growth; and to analyze the abundance of mycorrhization and its relationship with post-planting survival. The trial treatments were only applied during plant growth and consisted of a combination of three phosphorus concentration levels (1, 10 and 100 mg L-1) and two substrate water statuses (20 and 80 % of the container capacity (Cc)). The percentage of mycorrhization (% AM) was evaluated in plants grown in a nursery, in a sterilized substrate in the field, as was its survival in the field. Among the most relevant results, 24 % AM was found in the nursery while this value increased in the field (93 %), indicating that the mycorrhizal colonization process occurs during plant growth, even though it is partially inhibited by phosphorus and water management. It was also observed that the % MA increased once the plant was taken to the field independently of the % MA of the seedling in the nursery. [ABSTRACT FROM AUTHOR]

Populus and Salix species (Salicaceae) are widely distributed, either naturally or on plantations, in different regions of the world. Salicaceae species usually establish beneficial mutualistic associations with arbuscular mycorrhizal and ectomycorrhizal fungi, which can be used as biotechnological tools. In this work, a review of all studies published between 2010 and 2020 that addressed the occurrence of mycorrhizae in Populus and Salix was carried out using the Mendeley platform, in order to highlight its importance in the last decade and on a global scale. A total of 100 publications were reviewed, 77 on Populus, 17 on Salix, and six dealing with species of both genera. The finding that a higher number of studies were focused on Populus could be related with a higher interest in these species, since they have higher commercial value as compared to Salix species. The most studied hybrid species were Populus tremuloides, P. deltoides, Salix dasyclados and S. caprea. Ninety-seven percent of studies were carried out in the northern hemisphere, possibly because it corresponds to the natural distribution area of these species. The number of studies concerning the independent analyses of arbuscular mycorrhizae (42) and ectomycorrhizae (45) was similar, and only a few addressed both mycorrhizal types simultaneously. Based on our results, two main research gaps were identified: 1) the study of mycorrhizae in Salicaceae species in the southern hemisphere, and 2) the simultaneous study of arbuscular mycorrhizae and ectomycorrhizae in Salicaceae worldwide. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciencia y Tecnología Agropecuaria is the property of Agrosavia 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.)

Copyright of Journal of Viticulture & Enology / Ciência e Técnica Vitivinícola is the property of EDP 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.)

An experiment was carried out under semi-controlled conditions to evaluate the effect of biofertilization with Gluconacetobacter diazotrophicus and Funneliformis mosseae on Guinea grass (Megathyrsus maximus cv. Likoni). Five treatments (simple and combined inoculation with G. diazotrophicus and F. mosseae, fertilization with 25 mg N kg-1 of soil and a control without biofertilizers or nitrogenous fertilizer) were studied in a completely random design with five repetitions. Biofertilization with G. diazotrophicus and F. mosseae separately produced higher effects than the control without biofertilizers. However, with the combined application of both, the highest frequency of mycorrhizal colonization was reached (52.4 %), as well as concentrations of N in aerial biomass (18.5 g kg-1) and aerial biomass yields (7.45 g pot-1) and radical (7.38 g pot-1), similar to those obtained with nitrogen fertilization. It is concluded that the co-inoculation with G. diazotrophicus and F. mosseae is effective in improving nitrogenous nutrition and biomass yields of Megathyrsus maximus cv. Likoni. [ABSTRACT FROM AUTHOR]

(Em cobre no solo, o cobre Cu) é tóxico para o desenvolvimento dos vegetais. Simbiose veicular entre microrganismos e vegetais são da minimização da toxicidade das plantas contaminadas com cobre. O trabalho teve como objetivo selecionar as espécies de fungos microscópicos arbusculares para o desenvolvimento de plantas de trigo em solo contaminado com cobre. O delineamento experimental foi inteiramente casualizado em arranjo fatorial 4 × 6, sendo quatro espécies de fontes inóculos: espécies de micorrizas arbusculares (Acaulospora, Gigaspora margarita e Rhizophagus clarus) e semculo (testemunha) e seis doses de cobre no solo (0 , 80 , 160, 240, 320 e 400 mg kg -1), com sete repetições. Padrão-se a altura de plantas, comprimento de raiz, volume de raízes, massa seca de raiz,é superficial específico, diâmetro de raiz, teor de cobre na média, na parte aérea e no grão e grande de colonização. A massa de raiz e o conector foram identificados com altas doses de umidade. Os isolados Acaulospora Colombia e Gigaspora Margarita apresentam maior altura, comprimento de raiz e área superficial específica e menor teor de Cu no grão na cultura do trigo. A colonização micorrízica com os fungos Acaulospora Colombiana, Gigaspora Margarita e Rhizophagus clarus resulta em menor teor de cobre na parte aérea e nos grãos do trigo. Os isolados Acaulospora Colombia e Gigaspora Margarita apresentam maior altura, comprimento de raiz e área superficial específica e menor teor de Cu no grão na cultura do trigo.A colonização micorrízica com os fungos Acaulospora Colombiana, Gigaspora Margarita e Rhizophagus clarus resulta em menor teor de cobre na parte aérea e nos grãos do trigo. Os isolados Acaulospora Colombia e Gigaspora Margarita apresentam maior altura, comprimento de raiz e área superficial específica e menor teor de Cu no grão na cultura do trigo. A colonização micorrízica com os fungos Acaulospora Colombiana, Gigaspora Margarita e Rhizophagus clarus resulta em menor teor de cobre na parte aérea e nos grãos do trigo.

Rice husk is a by-product of the milling process of ripe rice grains. It provides important nutrients such as phosphorus and potassium and when mixed with soil and fertilizers, it delays soil compaction and hardening, favoring root and plant development. In this study, for the first time in Cuba, the application effect of rice husks as mulch in a three-year-old avocado plantation was evaluated. A notable increase in the number of mycorrhizal fungi spores was obtained, as well as a significant increase in yield, soil moisture retention and a control in the proliferation of unwanted plants. [ABSTRACT FROM AUTHOR]

Podocarpacea are the only native conifers of Peru, a country that contains one of the most important South American populations of one of its member species: Retrophyllum rospigliossi Pilger, which lives in the rainforests, where it is only preserved in small relics; due to this and the difficulties for reproduction and conservation in-situ is considered a vulnerable species. Among the microorganisms of the soil, the mycorrhizal fungi stand out for their symbiotic activity by allowing efficient nutrition, being beneficial for many species of trees, providing them with the necessary conditions for their survival. The objective of this work was to characterize the mycorrhizal colonization of Retrophyllum rospigliossi Pilger in the categories of saplings, latizal and fustal, and for this purpose, samples were collected in five georeferenced plots. The roots were colored with trypane blue for the observation of hyphae, vesicles, and shrubs. Soil samples were sifted for spore count. Mycorrhizal structures were found in all three categories, with significant differences for spores and vesicles. The behavior of these per gram of soil was variable (hyphae: 39.2 % to 53 %, spores 30.8 % to 57.6 %, vesicles: 35 % to 51.4 %, shrubs: 0 to 2 %). Colonization of roots ranged from 85 % to 96.2 %. Three mycorrhizal genera were identified: Glomus, Entrophospora and Acaulospora. It is concluded that, for a vegetative propagation of woody species, it is necessary to consider the use of arbuscular mycorrhizae to guarantee an adequate nutrition.

O cobre em elevada concentração no solo torna-se tóxico ao desenvolvimento das plantas e microrganismo. O trabalho objetivou selecionar fungos micorrízicos arbusculares eficientes para o desenvolvimento e produtividade da soja cultivada em solo contaminado com cobre. O delineamento experimental foi em Inteiramente casualizado em arranjo fatorial 7 × 4, sendo, sete doses de cobre (0, 80, 160, 240, 320, 400 e 480 mg de cobre kg-1de solo), quatro inóculos (testemunha sem inoculação e três fungos micorrízicos: Acaulospora colombiana, Dentiscutata heterogama e Rhizophagus clarus), com 7 repetições. Avaliou-se a altura da parte aérea, diâmetro do colo, número de grão por planta, massa seca da parte aérea e sistema radicular, área foliar, área superficial específica de raízes, teores e acúmulo de cobre na parte aérea, radicular e no grão, parâmetros da clorofila, e porcentagem de colonização micorrízica. A inoculação com fungos micorrízicos arbusculares Acaulospora colombiana, Dentiscutata heterogama, Rhizophagus clarus aumenta os parâmetros fenológicos e fisiológicos da soja e a sua produtividade soja em solo contaminado com até 480 mg kg-1de cobre aplicado no solo. O isolado Rhizophagus clarus promove maior desenvolvimento da soja e aumenta sua produtividade em solo contaminado com até 480 mg kg-1de cobre aplicado no solo em relação aos demais isolados.

La necesidad de buscar alternativas para mejorar la nutrición de los cultivos ante la baja fertilidad de los suelos agrícolas y la escasez de fertilizantes, cobra cada día mayor importancia. Una de estas alternativas es la aplicación de abonos orgánicos y la inoculación con hongos micorrízicos arbusculares (HMA). El objetivo del presente trabajo fue investigar el efecto de las aplicaciones de vermicompost y la inoculación de un biofertilizante micorrízico sobre el suministro de nutrientes de un suelo Gley Nodular Ferruginoso para plantas de millo perla (Panicum italicum L.). Se ejecutaron dos experimentos en condiciones de mesocosmos en el Instituto Nacional de Ciencias Agrícolas (INCA), se estudiaron cuatro proporciones de suelo-vermicompost, con y sin la inoculación micorrízica, en un diseño completamente aleatorizado con estructura factorial y tres repeticiones. Se evaluaron la altura, la masa seca de la biomasa aérea y la concentración y cantidad de nutrientes en las plantas, la frecuencia e intensidad de la colonización y el número de esporas en el suelo. La aplicación de vermicompost incrementó la disponibilidad de nutrientes del suelo y se reflejó en el incremento de la concentración y la cantidad de nutrientes en las plantas, lo que originó mayor crecimiento y desarrollo de estas; en presencia del millo perla la aplicación de vermicompost hizo disminuir la frecuencia e intensidad de la micorrización, lo que inhibió el efecto de la inoculación con hongos micorrízicos arbusculares y no se afectó la producción de esporas en el suelo. [ABSTRACT FROM AUTHOR]

Las comunidades vegetales micróf ilas y xeróf ilas en el norte de Chihuahua se desarrollan en condiciones de estrés climático y ambiental. Se considera que esta resistencia puede estar relacionada con la presencia de hongos micorrízicos de tipo vesículo arbusculares (HMVA). El objetivo de este trabajo fue relacionar el tipo de suelo con la presencia de HMVA en la rizósfera de las plantas de matorrales desérticos, como una posible respuesta a la resistencia de las plantas bajo condiciones ambientales extremas en las comunidades vegetales del área natural protegida (ANP) médanos de Samalayuca, Juárez, Chihuahua. Durante los meses de marzo a octubre de 2016, se realizaron dos muestreos dirigidos seleccionando cuatro puntos de muestreo con base en el tipo de comunidad vegetal registrada en campo. Los transectos fueron de 100 m, se generaron diez parcelas de 20 × 25 m2 en cada zona y para cada parcela se registró el número de individuos por especie vegetal. Los índices de Shannon, Simpson, Pielou y Morisita fueron utilizados para el estudio de las comunidades. Se tomaron submuestras de suelo de 500 g a una profundidad de 0 a 30 cm en cada sitio de muestreo. Los análisis físicos y químicos de suelo fueron pH, textura, conductividad eléctrica, porcentaje de humedad, nitrógeno mineral y fósforo extractable. La extracción y conteo de esporas de HMVA se realizó por medio de tamizado húmedo, decantación y centrifugación en solución sacarosa al 70%. Se determinaron tres tipos de comunidad vegetal: matorral inerme parvifolio, matorral mediano subinerme y matorral de médanos. La especie con mayor presencia y dominancia fue Larrea tridentata. Los suelos del área estudiada resultaron ser arenosos, alcalinos, con baja salinidad y contenido de nitrógeno y altos de fósforo. Los géneros de HMVA encontrados fueron: Gigaspora, Acaulospora, Glomus y Paraglomus. El análisis de correlación de Pearson indicó que no existe relación estadística significativa entre la cantidad de nitrógeno inorgánico con la densidad de las esporas de HMVA (r = 0.585), mientras que para el fósforo se detectó una significativa relación entre su concentración y la densidad de esporas (r = 0.987). La relación entre la cantidad de esporas y concentración de nutrientes del suelo demuestra que entre más bajo en nutrientes es menor el número de esporas, sin embargo, no se puede determinar directamente la resistencia de las plantas con la presencia de los HMVA.

The knowledge of mycorrhizal status of plants is very important both from ecological and conservation point of view, even more for endangered species and fragile ecosystems. Thus, this study aimed to evaluate and characterize the arbuscular mycorrhizal status of 20 Cuban endemic species present in the white sand savannas of Sabanalamar, Pinar del Río. Plants were sampled in October 2009 (end of the rainy season) and April 2010 (end of the following dry season). All species were arbuscular mycotrophic, and most of them showed high values of mycorrhizal colonization and visual density. No relationship was detected between seasonality and mycorrhizal association at the ecosystem level. Three plant groups were identified based on mycorrhizal association levels which suggests different strategies of mycorrhizal functioning. The Paris-type morphology was identified in all species. The Arum and Intermediate types were also present in 35 % and 15 % of the plant species, respectively, and always accompanied by the Paris-type. Root colonization by dark septate endophytes, fine endophyte and ectomycorrhiza were also observed in 19, seven and one species, respectively. This work contributes to the knowledge and characterization of the arbuscular mycorrhizal status of Cuban endemic species, as well as the reporting of other fungal root associations. Colonization by fine endophyte in Cuban plants is recorded for the first time. [ABSTRACT FROM AUTHOR]

Los hongos micorrizógenos arbusculares (HMA) establecen simbiosis con la mayoría de las plantas. Los mismos producen y liberan al suelo una glicoproteína denominada glomalina favoreciendo la formación de agregados estables en agua y mejoran la estructura de los suelos. El objetivo del presente trabajo fue caracterizar varios suelos Ferralíticos Rojos de la Llanura Roja de La Habana, con diferente uso, mediante algunas propiedades químicas (materia orgánica, pH, P, Ca, C, N) y biológicas, así como establecer correlaciones entre ambos tipos de variables. Las variables biológicas fueron el número de esporas de HMA y los contenidos de proteínas del suelo relacionadas a glomalina (total y fácilmente extraíble). Para esto se utilizaron diferentes métodos extractivos, seguido de la estimación de la concentración de proteínas o del conteo de esporas totales. Los resultados revelaron diferencias en las variables determinadas relacionadas a los cultivos presentes y al manejo del suelo. En general, los bosques mostraron valores superiores en las fracciones de glomalina, seguidos por los cultivos de caña (Saccharum officinarum) y pasto, mientras que los valores inferiores correspondieron a los suelos cultivados con papa (Solanum tuberosum), constituyendo estas variables mejores indicadores de la calidad del suelo que el número de esporas de HMA, dada su correlación con algunas variables químicas del suelo como la materia orgánica, C, N, pH y Ca. Se sugieren investigaciones futuras para dilucidar los resultados obtenidos, principalmente en cuanto al uso de la glomalina como indicador biológico de la degradación/ rehabilitación de los suelos según el ecosistema en estudio. [ABSTRACT FROM AUTHOR]

An experiment was carried out to evaluate the contribution of biofertilization to the reduction of nitrogen fertilization in Urochloa hybrid cv. Mulato II with the use of rhizobacterium Azospirillum brasilense and the arbuscular mycorrhizal fungus (AMF) Rhizoglomus irregulare. A total of three doses of nitrogen (0, 70 and 100 kg ha-1) were evaluated, alone and combined with the application of both biofertilizers, in a random block design, with factorial arrangement and four replications. For biofertilization, inocula containing A. brasilense with a concentration of 109 CFU mL-1, and R. irregulare, with a concentration of 30 spores g-1 were used. Both were applied by the seeds coating method at the time of sowing. In the case of A. brasilense, a second application was made, at a rate of 20 L ha-1 after the first cut. The grass significantly responded (P <0.01) to nitrogen fertilization. The highest yields (14.5 t ha-1), concentrations of nitrogen in biomass (16.1 g kg-1) and organic matter digestibility (64.7 %), as well as the lowest content of neutral detergent fiber (68.1 %) were obtained with the dose of 100 kg N ha-1. With the biofertilization, without the application of nitrogen, these indicators reached similar values to those registered with the addition of 100 kg N ha-1. The effect of biofertilizers was maintained for a year. It is concluded that biofertilization with A. brasilense and R. irregulare constitutes an effective alternative to reduce the use of nitrogen fertilizer in B. hybrid cv. Mulato II. [ABSTRACT FROM AUTHOR]

Podocarpacea are the only native conifers of Peru, a country that contains one of the most important South American populations of one of its member species: Retrophyllum rospigliossi Pilger, which lives in the rainforests, where it is only preserved In small relics; due to this and the difficulties for reproduction and conservation in-situ is considered a vulnerable species. Among the microorganisms of the soil, the mycorrhizal fungi stand out for their symbiotic activity by allowing efficient nutrition, being beneficial for many species of trees, providing them with the necessary conditions for their survival. The objective of this work was to characterize the mycorrhizal colonization of Retrophyllum rospigliossi Pilger in the categories of saplings, latizal and fustal, and for this purpose, samples were collected in five georeferenced plots. The roots were colored with trypane blue for the observation of hyphae, vesicles, and shrubs. Soil samples were sifted for spore count. Mycorrhizal structures were found in all three categories, with significant differences for spores and vesicles. The behavior of these per gram of soil was variable (hyphae: 39.2% to 53%, spores 30.8% to 57.6 °/o, vesicles: 35% to 51.4 °/o, shrubs: 0 to 2%). Colonization of roots ranged from 85% to 96.2%. Three mycorrhizal genera were identified: Glomus, Entrophospora and Acaulospora. It is concluded that, for a vegetative propagation of woody species, it is necessary to consider the use of arbuscular mycorrhizae to guarantee an adequate nutrition. [ABSTRACT FROM AUTHOR]

Se realizó un experimento con el objetivo de evaluar el efecto de la biofertilización con la rizobacteria Azospirillum brasilense y el hongo micorrízico arbuscular Rhizoglomus irregulare en el pasto Brachiaria híbrido cv. Mulato II cultivado en un suelo Pardo Mullido Carbonatado. Se incluyeron cuatro tratamientos conformados por la inoculación sola y combinada, de ambos microorganismos, más un testigo sin inocular, en un diseño cuadrado latino. El inóculo con R. irregulare poseía una concentración de 30 esporas g-1 y se aplicó mediante el método del recubrimiento de las semillas al momento de la siembra, mientras que A. brasilense, con una concentración de 109 UFC mL-1, se aplicó sumergiendo las semillas en una solución de inóculo y agua en relación 1:10, y a razón de 20 L ha¹ después del primer corte. Se realizaron cuatro cortes, a intervalos de 60 y 90 días en el período lluvioso y poco lluvioso, respectivamente. R. irregulare aumentó la frecuencia e intensidad de la colonización micorrízica, así como el número de esporas en la rizosfera, aunque los mayores resultados se alcanzaron cuando se aplicó con A. brasilense. Los biofertilizantes por separado incrementaron el crecimiento de la parte aérea y radical de las plantas, las concentraciones de nitrógeno en la biomasa aérea y el rendimiento de masa seca del pasto, pero los mayores valores de estas variables, así como la mayor contribución de la biofertilización a la nutrición nitrogenada del pasto, se obtuvieron con su aplicación conjunta. El efecto de la biofertilización se mantuvo durante un año. [ABSTRACT FROM AUTHOR]

Grazing by large herbivores represents an important disturbance in natural grasslands, affecting its structure and function. Arbuscular mycorrhizas (AM) are cosmopolitan interactions in these ecosystems, particularly in grasses, main constituent of this ecosystem. Mycorrhizas show contradictory responses to grazing (AM colonization has been positively, negatively and not affected by grazing). We hypothesized that each grazing component (selective defoliation, trampling and urine deposition) would differentially affect mycorrhizal colonization, and this could explain the high variability in AM responses. Our objective was to assess the effect of trampling, selective defoliation and nitrogen (N) addition on AM colonization of one of the most important grasses in Río de la Plata grasslands: Paspalum dilatatum. Grazing components were simulated in a manipulative experiment where we evaluated their individual and combined effects on total AM colonization and the occurrence of different fungal structures (arbuscules, coils and vesicles). No grazing component affected total AM colonization and arbuscules, while other fungi structures were affected by different treatments. Coil colonization (one of the nutrient interchange structures between the symbionts) was positively affected by selective defoliation and it was negatively affected by N addition; these structures were also affected by the combined effect between selectivity x trampling and by trampling x N addition. Vesicle colonization was negatively affected by trampling, maybe because of mechanical damage to roots and to extraradical mycelium caused by this disturb. The study of the individual grazing components showed that each one caused different effects on mycorrhizal interaction and their relative influence could affect the overall grazing effect on this interaction. [ABSTRACT FROM AUTHOR]

The physiological studies related to the mycorrhizal symbiosis have made difficult due to the condition of the symbionts that are characterized by the fungi that intervene in the association, which, up to now, can't grow in axenic conditions. However, in vitro root cultivation techniques, as a simplified system for the establishment of the arbuscular mycorrhizal symbiosis, have been widely used and they are very important in several investigations. The aim of this study was to obtain disinfected spores of Rhizoglomus sp. (INCAM-11) from soil, which express high percentages of germination and low levels of contamination on in vitro conditions and determine the growth period of the germination hyphae. INCAM-11 propagules were disinfected and their percentages of germination and contamination, as well as the germinative tube length were evaluated. Results show that the immersion time of spores in antibiotic solution during 24 hours, before its inoculation in the Modified Strulla and Romand (MSR) medium, can reduces the contamination percentage and the moment of germination. In the other hand, the hyphae germination spreads in the culture medium during 30 days approximately, before stopping their growth, contributing to the later establishment of the association in the transformed roots. [ABSTRACT FROM AUTHOR]

Se realizó un estudio con el objetivo de evaluar los intervalos de corte (30, 60 y 90 días) y el manejo de la nutrición en la morera: sin fertilizantes minerales ni canavalia intercalada e inoculada con HMA (F0); fertilización mineral a razón de 150 y 75 kg ha-1 de N y K2O por época del año (FM), respectivamente; y canavalia intercalada e inoculada con HMA (CeHMA). El diseño fue de bloques al azar con arreglo factorial, y el suelo se clasifica como Ferralítico Rojo lixiviado. En la época lluviosa, los mayores rendimientos se obtuvieron con CeHMA y corte cada 90 días (entre 10,99 y 6,85 kg ha-1 de MS), y en la época poco lluviosa este indicador fue mayor en FM (entre 3,56 y 2,52 kg ha-1 de MS). La producción de biomasa comestible por corte a los 90 días mostró diferencias entre tratamientos a favor de FM en el primer corte y de CeHMA en el segundo corte. CeHMA con el intervalo de 90 días alcanzó una proporción de hojas superior a la media poblacional en la época lluviosa, no así en la poco lluviosa. El rendimiento de PB en la época lluviosa fue mayor en FM con los intervalos de 60 y 90 días, y en CeHMA en el intervalo de 90 días. Se concluye que el intervalo de corte cada 90 días fue el mejor, y que resultó factible intercalar la canavalia inoculada con HMA en la época de lluvia. La época del año determinó la cuantía de la producción de forraje y de proteína bruta, la cual fue tres veces mayor en la época lluviosa.

Por milenios los agricultores han mejorado sus cultivos utilizando la variación genética y seleccionando las mejores variedades. Hoy nos enfrentamos a un reto sin precedentes: alimentar la creciente población mundial. Así, aumentar los rendimientos de cultivos de importancia global, como la yuca, es crucial para la seguridad alimentaria.. Esta raíz tropical alimenta aproximadamente 1.000 millones de personas en alrededor de 105 países en el mundo y sus productos son la tercera fuente de calorías más importante para los países del trópico. Esta planta es altamente dependiente de la asociación con hongos formadores de micorrizas arbusculares (HFMA). Estos hongos ayudan a la planta a obtener fósforo del suelo, un nutriente limitante principalmente en los suelos del trópico. Recientemente, nuestro grupo de investigación colombo-suizo, mostró que la inoculación de cultivos de yuca con Rhizophagus irregularis incrementó los rendimientos en dos localidades diferentes de Colombia. Más aún, conseguimos enormes diferencias en la productividad de la yuca, utilizando diferentes líneas genéticamente mejoradas del hongo R. irregularis, en condiciones de campo. Es improbable observar cambios tan dramáticos, en campo, en la producción de yuca, con un ciclo de mejoramiento de la planta. Así, combinando la agronomía con la biología y la genética, proponemos un cambio en el paradigma del mejoramiento vegetal, que pueda contribuir a resolver el problema de hambruna en el mundo.

El fósforo (P) es un macronutriente poco biodisponible para las plantas y por lo tanto, limitante para su crecimiento. El uso de hongos solubilizadores de P (HS) es una alternativa prometedora en el aprovechamiento de la fertilización fosforada. Sin embargo, aún no se ha establecido si los HS tienen efectos sobre la micobiota benéfica del suelo, como los hongos micorrícico-arbusculares (HMA). Este trabajo estudia el efecto de HS con capacidad biocontroladora de fitopatógenos fúngicos sobre el desarrollo micorrícico preinfectivo de HMA, el primer paso en la colonización de la raíz, de los HMA. Se expusieron esporas del HMA Gigaspora rosea a distintas concentraciones de exudados (0; 0,01; 0,1; 1; 3%) de distintos HS: Talaromyces helicus cepa L7B, T. helicus cepa N24, T. diversus y Penicillium purpurogenum, en un sistema in vitro con medio semilíquido. Se evaluó la germinación de las esporas y la elongación, ramificación y morfología del micelio pre-infectivo. Se observó que solo T. diversus incrementó la germinación y que T. helicus L7B promovió la elongación, ramificación y modificó la morfología del micelio pre-infectivo del HMA sin afectar la germinación. Estos resultados demuestran que el desarrollo pre-infectivo de G. rosea (germinación, elongación, ramificación y morfología) puede ser modulado en función de la cepa de HS estudiada, sugiriendo que las interacciones microbianas podrían impactar positivamente sobre la nutrición fosforada vegetal mediante la modificación del estadio previo a la simbiosis micorrícica.

La reconversión de una agricultura de altos insumos hacia una agroecológica en armonía con el medio ambiente, contribuye a disminuir la degradación de los agroecosistemas. El objetivo del presente trabajo fue evaluar el efecto de diferentes manejos nutricionales en el rendimiento y, la calidad interna y externa de los frutos de tomate, como alternativa a la disminución de fertilizantes minerales. La investigación se desarrolló en el Instituto Nacional de Ciencias Agrícolas (INCA) de Cuba, entre el 15 septiembre y el 30 de noviembre de 2016. Bajo un diseño de bloques al azar con cuatro réplicas, se estudiaron cuatro tratamientos: control absoluto (sin fertilizante mineral y sin bioproductos), nutrición parcial ecológica (50% del fertilizante mineral + bioproductos: micorrizas y bioestimulante), nutrición orgánica (abono orgánico + bioproductos: micorrizas y bioestimulante) y nutrición convencional (solo fertilizante mineral NPK). Se realizaron evaluaciones referidas al rendimiento agrícola y sus componentes, la calidad bromatológica de los frutos (ºBx, acidez, contenidos de vitamina C y nitratos) e índices de postcosecha (firmeza de frutos y diámetro de endocarpio y mesocarpio). El rendimiento agrícola (25,31 t/ha) y calidad interna de los frutos (5,23 oBrix; 11,75 SST; 73,29 de nitratos; 18,54 de vitamina C y 4,45 de materia seca), en el tratamiento donde se prescindió del 50% de la fertilización mineral, el cual se complementó con bioproductos, no tuvo diferencias significativas con el tratamiento de solo NPK. En la variante orgánica el resultado en rendimiento agrícola fue inferior (19,42 t/ha), con respecto al control y la variante ecológica. Por tanto, se sugiere continuar evaluando el efecto de la reducción de la fertilización mineral en el cultivo del tomate a partir de su combinación con bioproductos.

A aplicação de fungicidas foliares em vinhedos incrementa o teor de cobre (Cu) no solo, que pode modificar parâmetros fisiológicos de videiras jovens transplantadas em solos de vinhedos erradicados. A inoculação com fungos micorrízicos arbusculares (FMA) pode reduzir a disponibilidade de Cu às videiras e, com isso, reduzir o efeito tóxico do Cu nas células de plantas jovens. O trabalho objetivou avaliar alterações fisiológicas no porta-enxerto de videira ‘P1103’ (Vitis berlandieri x Vitis rupestris) cultivado em solo com alto teor de Cu e inoculado com espécies de FMA. O experimento foi conduzido em casa de vegetação. As videiras foram acondicionadas em vasos. No momento do transplante, as raízes foram inoculadas com os FMA: Dentiscutata heterogama, Acaulospora morrowiae e Rhizophagus clarus, além de um tratamento controle, não-inoculado. O experimento foi conduzido em blocos ao acaso com sete repetições. O cultivo foi realizado durante 76 dias, ao final do qual foi avaliado a altura de planta, a área foliar, as taxas de trocas gasosas, colonização micorrízica, matéria seca de raízes, caule e folha; número de folhas, diâmetro de colmo, teores de carboidratos solúveis totais, amido total, clorofila a, b e total, carotenoides, teores de Cu e P nas plantas. Dentre os FMA avaliados, o R. clarus promoveu maior benefício para o crescimento das plantas e reduziu o teor de Cu nos tecidos. As maiores taxas de assimilação de CO2 e condutância estomática ocorreram nas plantas inoculadas com D. heterogama. Os FMAs estudados amenizaram a toxicidade do cobre às videiras jovens.

ABSTRACT Cassava (Manihot esculenta Crantz) is a highly mycotrophic crop, and prior soil cover may affect the density of arbuscular mycorrhizal fungi (AMFs), as well as the composition of the AMFs community in the soil. The aim of this study was to evaluate the occurrence and the structure of AMFs communities in cassava grown after different cover crops, and the effect of the cover crop on mineral nutrition and cassava yield under an organic farming system. The occurrence and structure of the AMFs community was evaluated through polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE). A randomized block experimental design was used with four replications. Six different cover crop management systems before cassava were evaluated: black oats, vetch, oilseed radish, intercropped oats + vetch, intercropped oats + vetch + oilseed radish, plus a control (fallow) treatment mowed every 15 days. Oats as a single crop or oats intercropped with vetch or with oilseed radish increased AMFs inoculum potential in soil with a low number of propagules, thus benefiting mycorrhizal colonization of cassava root. The treatments did not affect the structure of AMFs communities in the soil since the AMFs communities were similar in cassava roots in succession to different cover crops. AMFs colonization was high despite high P availability in the soil. The cassava crop yield was above the regional average, and P levels in the leaves were adequate, regardless of which cover crop treatments were used. One cover crop cycle prior to the cassava crop was not enough to observe a significant response in variables, P in plant tissue, crop yield, and occurrence and structure of AMFs communities in the soil. In the cassava roots in succession, the plant developmental stage affected the groupings of the structure of the AMF community.

Arbuscular mycorrhizal fungi help to reduce the damage caused by erosion and maintain soil structure through the production of mycelium and adhering substances. This study evaluated the structural stability; estimated the diversity and density of mycorrhizal spores present in three systems of soil (eroded, forest and coffee plantations) in the rural area of Dagua, Valle del Cauca, Colombia. The systems evaluated were classified as farms with intensive or agroecological management. There were 25 morphospecies of mycorrhiza grouped in 13 genera, being Glomus and Entrophospora the most representative. The mean index values of mean weight (DPM) and geometric (DGM) diameters and diversity of mycorrhizal spores were statistically higher in farms with agroecological management than in farms with intensive management. The aggregate stability analysis revealed that eroded soils have significantly lower stability than forest and crop soils. A statistically significant correlation was found between diversity (r = 0.579) and spore density (r = 0.66) regarding DGM, and DPM with Shannon diversity (r = 0.54). Differences in practices, use and soil management affect mycorrhizal diversity found on farms and its effect such as particle aggregation agent generates remarkable changes in the stability and soil structure of evaluated areas. It is concluded, that agroecological management tends to favour both mycorrhizae and the structure of soils.

Copyright of Terra Latinoamericana is the property of Sociedad Mexicana de la Ciencia del Suelo A.C. 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.)

The conversion of high-input agriculture to an agro-ecological approach bring harmony to the environment reducing degraded Agroecosystems. The objective of this study was to evaluate the effect of different nutritional management on yield and internal and external quality of tomato fruits as an alternative to the reduction of mineral fertilizers. The research was carried out at the National Institute of Agricultural Sciences (INCA) in Cuba, from September 15 to November 30, 2016. A randomized block design with four replications was used to study four treatments: Absolute control (without mineral fertilizer and bioproducts), Partial ecological nutrition (50 % of mineral fertilizer + bioproducts: mycorrhiza and biostimulant), Organic nutrition (organic fertilizer + bioproducts: mycorrhiza and biostimulant), and Conventional nutrition (NPK mineral fertilizer only). Evaluations regarding agricultural yield and its components, bromatological quality of fruits (brix, acidity, vitamin C content, and nitrates) and postharvest indeces (fruit firmness and diameter of endocarp and mesocarp) were performed. Agricultural yield (25.31 t/ha) and the internal quality of fruits (5.23 °Brix; 11.75 SST; 73.29 nitrates; 18.54 vitamin C, and 4.45 dry matter) applying the treatment where 50% of mineral fertilization was dispensed andcomplemented by bioproducts did not show significant differences with NPK treatment. Regarding the organic variant, the result in agricultural yield was lower (19.42 t/ha), in comparison with control and the ecological variant. Therefore, it is suggested further evaluation of the effect of the reduction of mineral fertilization on tomato crop and its combination with bioproducts. [ABSTRACT FROM AUTHOR]

Microbial interactions: effect of biocontrol and P solubilizing fungi in pre-symbiotic stages of arbuscular mycorrhizal fungi. Phosphorus (P) is an essential macronutrient with a low bioavailability in soils, thus limiting the plant growth. The use of P solubilizing fungi (HS) is a promising alternative to increase the efficiency of P-fertilizers. However, it is not fully understood if HS have antagonist effects on beneficial soil microbiota, such as arbuscular mycorrhizal fungi (HMA). This work studies the effect of HS with biocontrol abilities against phytopathogenic fungi on the pre-infective stages development of HMA, the first step in mycorrhizal root colonization. Spores of the HMA Gigaspora rosea were exposed in vitro to different exudate concentrations (0; 0,01; 0,1; 1; 3%) of different HS fungal strains (Talaromyces helicus strain L7B, T. helicus strain N24, T. diversus and Penicillium purpurogenum) in a system containing semi-liquid medium. Spores germination, elongation, ramification and morphology of the pre-infective mycelium of HMA were evaluated. We observed that only T. diversus increased germination while T. helicus L7B promoted the elongation, ramification and produced changes in the mycelial morphology without affecting spores' germination. These results showed that germination and pre-infective development of G. rosea can be modified in length and ramification as a function of the identity of the HS strain used, suggesting that microbial interactions can positively impact on plant P nutrition through the modification of the previous stage to mycorrhizal symbiosis. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the effect of sucrose concentration in the culture medium on growth and on the establishment of mycorrhizas during the acclimatization of pineapple cv. Pérola. The plantlets were micropropagated in MS culture medium with 0, 10, 20 and 30 g L-1 of sucrose and then they were acclimatized during 12 weeks under greenhouse conditions, in a sandy soil - compost mixture, uninoculated or inoculated with a Rhizophagus clarus isolate. Plantlets from the culture medium with 20 g and 30 g of sucrose L-1 showed higher shoot and root biomass than those from sugar-free medium. Mycorrhizal colonization was lower in plantlets micropropagated in sucrose-free medium, but the intensity of arbuscules did not differ among treatments. In the 12-week period of acclimatization, mycorrhizal colonization had no effect on plant biomass.

Copyright of Revista Chapingo Serie Ciencias Forestales is the property of Universidad Autonoma Chapingo 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 Cuba, it have been carried out investigations related with the inoculation of species of arbuscular mycorrhizal fungis (AMF) in diverse crops and soil types, being that, for a same soil type, the species that bigger stimulation of the growth of the host plant is always the same, what has allowed infering that a high specificity efficient species of AMF exists for soil type. This work was carried out to evaluate if some properties of the soil have relationship to the response of Canavalia ensiformis to the AMF inoculation, cultivated in three types of soils. They were used the results of experiments conduced in Nitisol, Cambisol and Plintosol soils. The canavalia was inoculated with the species Glomus cubense, Rhizophagus intraradices and Funneliformis mosseae. In all the cases was used at complete randomized blocks design. The results of the behavior of the canavalia inoculated with the most efficient species and the chemical properties of the soil were processed by means of a correlation analysis through the coefficient of Pearson. Also, it was carried out an analysis of main components for all the valued indicators. It is demonstrated that the soil type, their nutrients content and the pH have a high relationship with the answer type found in canavalia, being therefore, the efficient specie that was different in each case, in correspondence with the chemical properties of the soil in each analyzed experimental situation. [ABSTRACT FROM AUTHOR]