Estudio de la asociación micorrícica arbuscular en tres especies de Asterella (Aytoniacaea, Marchantiophyta) de la región del Himalaya occidental, India
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AM, arbúsculos, micorrizas, hepáticas, Asterella, rizósfera, GlomeromycotinaResumen
La mayoría de las especies de plantas, incluidas las briófitas y las pteridofitas, desarrollan conexiones mutualistas con hongos micorrízicos arbusculares (MA) que facilitan una mayor absorción de agua y nutrientes en las plantas y proporcionan una mayor resistencia ante diversos estreses bióticos y abióticos. El presente estudio explora la diversidad de micorrizas arbusculares asociadas con las hepáticas taloides Asterella sp. Se estudiaron tres especies de Asterella (A. khasyana, A. blumeana, A. wallichiana) para determinar la asociación con MA. Asociación fúngica presente en ambos tipos de rizoides (de paredes lisas y tuberculados), se encuentra un alto grado de colonización en los rizoides de paredes lisas en comparación con los rizoides tuberculados, lo que valida el papel diferencial de absorción realizado por ambos tipos de rizoides. A. Khasyana y A. blumeana muestran la presencia de hifas fúngicas tanto septadas como aseptadas en rizoides, lo que confirma la asociación de más de un hongo. Además de los rizoides, la región de almacenamiento y de la nervadura central del talo muestra una intensa colonización fúngica. También se observan varias estructuras de MA como arbúsculos y vesículas tanto en rizoides como en talo. Se aislaron esporas de nueve especies de hongos pertenecientes a dos géneros Glomus y Gigaspora del suelo de la rizosfera de A. Khasyana y A. wallichiana.
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