Microorganismos endofíticos en plantas in vitro de Dioscorea cayenensis subsp. rotundata Poir clon blanco de Guinea

Autores

DOI:

https://doi.org/10.62452/x1ab5763

Palavras-chave:

Aislamiento microbiano, bacterias, contaminantes endógenos, cultivo de meristemo, medios de cultivo, micropropagación, ñame, reguladores del crecimiento

Resumo

El presente estudio tuvo como objetivo caracterizar los contaminantes microbianos presentes en plantas in vitro de Dioscorea cayenensis subsp. rotundata clon blanco de Guinea tras varios subcultivos, y su control mediante el cultivo de meristemos. Segmentos uninodales se cultivaron en condiciones asépticas durante siete subcultivos. Además, se cultivaron meristemos en presencia de ácido naftalenacético combinado con las citoquininas bencilaminopurina o metatopolina en diferentes concentraciones. Se observó un incremento en la contaminación microbiana superior al 45 % a partir del quinto subcultivo. El análisis microbiológico mediante tinción Gram, pruebas bioquímicas y fisiológicas, permitió identificar bacterias endófitas del género Pseudomonas en hojas-tallos, y Bacillus en raíces. El cultivo de meristemos en medios de cultivo con ácido naftalenacético (0,1 mg.l-1) y metatopolina (0,15 mg.l-1), redujo la fenolización, favoreció la brotación y las variables morfológicas evaluadas. Estos resultados demuestran que el cultivo de meristemos, bajo condiciones y combinaciones hormonales óptimas, es una estrategia efectiva para controlar los contaminantes endofíticos y mejorar la calidad morfogenética de plantas in vitro de ñame, incrementando el potencial para su micropropagación comercial.

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Publicado

2025-09-13

Como Citar

Pérez-Pérez, J. L. ., Villavicencio-Ramírez, A. ., Borges-García, M. ., Hernández-Jeréz, Y. ., & Silva-Pupo, J. J. (2025). Microorganismos endofíticos en plantas in vitro de Dioscorea cayenensis subsp. rotundata Poir clon blanco de Guinea. Revista Metropolitana De Ciencias Aplicadas, 8(S2), 7-17. https://doi.org/10.62452/x1ab5763