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Los hongos endofíticos insecto-parásitos translocan el nitrógeno directamente de los insectos a las plantas
S W Behie1, P M Zelisko, M J Bidochka
1Department of Biological Sciences, Brock University, St. Catharines, Ontario, Canada.
Science (New York, N.Y.)
|June 23, 2012
Resumen
Los hongos Metarhizium pueden transferir nitrógeno derivado de insectos a las plantas. Este estudio muestra la adquisición activa de nitrógeno por las plantas en interacciones tripartitas, impactando el ciclo del nitrógeno del suelo.
Área de la Ciencia:
- La micología de la micología.
- Ciencias de las plantas Ciencias de las plantas.
- Ecología del suelo Ecología del suelo
Sus antecedentes:
- Las plantas adquieren principalmente nitrógeno a través de bacterias simbióticas y la descomposición.
- Las plantas vasculares a menudo forman asociaciones simbióticas con hongos endofíticos.
- Metarhizium, un endófito común, también es un patógeno de insectos y una fuente potencial de nitrógeno.
Objetivo del estudio:
- Para investigar si Metarhizium puede transferir activamente nitrógeno derivado de insectos a las plantas.
- Explorar el papel de Metarhizium en la adquisición de nitrógeno dentro de una interacción tripartita.
Principales métodos:
- Se utilizaron microcosmos del suelo para estudiar el Metarhizium robertsii.
- Los insectos inyectados con nitrógeno (15) N-etiquetado.
- Seguido (15) La incorporación de N en aminoácidos de frijoles de haricot y switchgrass.
Principales resultados:
- Translocación demostrada de nitrógeno derivado de insectos a las plantas a través de M. robertsii.
- (15) El N se incorporó con éxito a los aminoácidos vegetales.
- Evidencia de la transferencia de nitrógeno activo en una interacción planta-hongos-insecto.
Conclusiones:
- Metarhizium facilita la adquisición de nitrógeno activo por las plantas de presas de insectos.
- Esta interacción tripartita juega un papel importante en el ciclo del nitrógeno del suelo.
- Los hongos endofíticos pueden servir como un conducto directo de nitrógeno a las plantas.
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