Diversidad de la micobiota endófita de Cattleya percivaliana y Cattleya trianaei cultivadas en invernadero

Pilar X. Lizarazo-Medina, Marcelina M. Mendoza-Salazar, Ana I. Gutiérrez-Gallo

Resumen


Los microorganismos endófitos se desarrollan asintomáticamente en el interior de los tejidos. En este estudio se aislaron hongos endófitos de hojas y raíces de Cattleya percivaliana Cattleya trianaei cultivadas bajo condiciones de invernadero. Se obtuvieron 323 hongos endófitos a partir de 4.800 fragmentos de tejido; estos aislados fueron clasificados en 14 géneros caracterizados macroscópica y microscópicamente, y cinco morfotipos no pudieron ser identificados. Se observaron diferencias en el número de plantas colonizadas por especie vegetal y en la diversidad de los endófitos a nivel de tejido, siendo mayores en C. trianaei y en hoja, respectivamente. Se identificaron géneros que colonizaron exclusivamente un tejido, o ambos tejidos. En hoja se registraron: Chromelosporium, Cladosporium, Exophiala, Gonatobotrys, Monilinia Nodulisporium; mientras que Curvularia, Gloeosporium y cinco morfotipos no identificados colonizaron solamente la raíz. Los géneros Aureobasidium, Botryotrichum, Colletotrichum, Fusarium, Sclerotium Trichoderma crecieron en ambos tejidos. El género Fusarium fue el género más abundante en raíz y, Colletotrichum Sclerotium en hoja.


Palabras clave


diversidad; endófito; hongo; orchidaceae

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Referencias


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