Mycorrhizal fungi isolated from Chilean orchids as biocontrollers of the pathogen Rhizoctonia solani

Pereira, Guillermo; Roa, Nicole; Castillo-Novales, Diyanira; Arriagada, César; Herrera, Héctor; Molina‐Montenegro, Marco A.; Átala, Cristian

doi:10.4067/s0717-66432021000200113

Cited by 2 publications

(2 citation statements)

References 44 publications

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“…La acción antifúngica de T. harzianum y T. viride encontrado en este trabajo corrobora los reportes de que estos hongos son agentes de biocontrol para numerosas enfermedades postcosecha; por eso, a menudo son empleados como controladores biológicos (John et al, 2010;Nguyen et al, 2016;Pereira et al, 2021;Yuan et al, 2022), en función de los metabolitos secundarios y enzimas que producen que son de vital importancia en aplicaciones agrícolas (Salwan et al, 2019;Li et al, 2019b).…”

Section: Figura 5 Control De Las Lesiones De La Antracnosis De Collet...unclassified

Control de Colletotrichum “agente causal de la antracnosis en el fruto del mango (Mangifera indica L.)” aplicando metabolitos de Trichoderma

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et al. 2022

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El uso de hongos controladores para el control de hongos fitopatógenos actualmente se está aplicando ampliamente como parte del proceso de la agricultura orgánica, pero también para la comercialización de frutos de exportación que están expuestos a enfermedades fúngicas que acarrean pérdidas cuantiosas. En este trabajo, se tuvo como objetivo evaluar el control de Colletotrichum “agente causal de la antracnosis en el fruto del mango (Mangifera indica L.)” aplicando metabolitos de Trichoderma, para determinar los porcentajes de inhibición del crecimiento micelial y de la inhibición de la germinación de las conidias de Colletotrichum sp. y del control de las lesiones de la antracnosis de Colletotrichum en el fruto del mango. Se hicieron evaluaciones in vitro, aplicando antagonismo de los T. harzianum y T. viride contra Colletotrichum sp. en pruebas duales, y solución de metabolitos de los Trichoderma contra suspensiones de conidias de Colletotrichum sp.; e in vivo, aplicando soluciones de metabolitos de los Trichoderma sobre el fruto del mango infectado con Colletotrichum sp. En los resultados, se muestra que los Trichoderma, in vitro, como inóculo fúngico y como solución de metabolitos, inhiben respectivamente el crecimiento micelial y la germinación de conidias de Colletotrichum sp. significativamente; e in vivo, como solución de metabolitos sobre el fruto del mango, controlan la antracnosis de Colletotrichum sp.; siendo la solución de metabolitos de T. viride el que ejerce un mayor control comparable al de un biocontrolador que puede ser empleado para controlar la antracnosis en el fruto del mango, sobre todo de exportación.

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Section: Figura 5 Control De Las Lesiones De La Antracnosis De Collet...unclassified

Control de Colletotrichum “agente causal de la antracnosis en el fruto del mango (Mangifera indica L.)” aplicando metabolitos de Trichoderma

Niebles

Escobar

Centeno

et al. 2022

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“…Terrestrial autotrophic orchids are often associated with mycorrhizal taxa from the Tulasnellaceae, Ceratobasidiaceae, and Serendipitaceae families [ 11 ]. Still, they can also interact with diverse phyla, including saprophytic, endophytic, and some commonly accepted phytopathogens [ 12 , 13 , 14 ].…”

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Diversity of Root-Associated Fungi of the Terrestrial Orchids Gavilea lutea and Chloraea collicensis in a Temperate Forest Soil of South-Central Chile

Herrera

Sanhueza

Valadares

et al. 2022

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The diversity of orchid mycorrhizal fungi (OMF) and other beneficial root-associated fungi in temperate forests has scarcely been examined. This study aimed to analyze the diversity of mycorrhizal and rhizosphere-associated fungal communities in the terrestrial orchids Gavilea lutea and Chloraea collicensis growing in high-orchid-population-density areas in the piedmont of the Andes Cordillera with native forest (Nothofagus-Araucaria) and Coastal Cordillera with an exotic plantation (Pinus-Eucalyptus) in south-central Chile. We focused on rhizosphere-inhabiting and peloton-associated OMF in a native forest (Andes Cordillera) and a mixed forest (Coastal Cordillera). The native terrestrial orchids G. lutea and C. collicensis were localized, mycorrhizal root segments were taken to isolate peloton-associated OMF, and rhizosphere soil was taken to perform the metabarcoding approach. The results revealed that Basidiomycota and Ascomycota were the main rhizosphere-inhabiting fungal phyla, showing significant differences in the composition of fungal communities in both sites. Sebacina was the most-abundant OMF genera in the rhizosphere of G. lutea growing in the native forest soil. In contrast, Thanatephorus was the most abundant mycorrhizal taxa growing in the rhizosphere of orchids from the Coastal Cordillera. Besides, other OMF genera such as Inocybe, Tomentella, and Mycena were detected. The diversity of OMF in pelotons differed, being mainly related to Ceratobasidium sp. and Tulasnella sp. These results provide evidence of differences in OMF from pelotons and the rhizosphere soil in G. lutea growing in the Andes Cordillera and a selection of microbial communities in the rhizosphere of C. collicensis in the Coastal Cordillera. This raises questions about the efficiency of propagation strategies based only on mycorrhizal fungi obtained by culture-dependent methods, especially in orchids that depend on non-culturable taxa for seed germination and plantlet development.

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Mycorrhizal fungi isolated from Chilean orchids as biocontrollers of the pathogen Rhizoctonia solani

Cited by 2 publications

References 44 publications

Control de Colletotrichum “agente causal de la antracnosis en el fruto del mango (Mangifera indica L.)” aplicando metabolitos de Trichoderma

Control de Colletotrichum “agente causal de la antracnosis en el fruto del mango (Mangifera indica L.)” aplicando metabolitos de Trichoderma

Diversity of Root-Associated Fungi of the Terrestrial Orchids Gavilea lutea and Chloraea collicensis in a Temperate Forest Soil of South-Central Chile

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