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El flujo de carbono en las asociaciones microbianas de las plantas
Resumen
Las legumbres comparten productos de la fotosíntesis con los microbios simbióticos. La planta aumenta la fotosíntesis para apoyar a sus socios fúngicos y bacterianos.
Área de la Ciencia:
- Biología vegetal Biología vegetal
- Microbiología Microbiología.
- Interacciones simbióticas Las interacciones simbióticas.
Sus antecedentes:
- Las legumbres forman relaciones simbióticas con hongos micorrizales y bacterias fijadoras de nitrógeno.
- Estos simbiontes proporcionan nutrientes esenciales a la planta, que a su vez requiere carbono.
Objetivo del estudio:
- Para cuantificar la distribución de los productos de la fotosíntesis en una asociación simbiótica tripartita.
- Comprender la asignación de carbono entre las legumbres, los hongos micorrizales y las bacterias fijadoras de nitrógeno.
Principales métodos:
- Medición de la distribución de los productos de la fotosíntesis.
- Análisis de la incorporación de carbono y la respiración por los simbiontes.
- Evaluación de la utilización de nódulos y hongos de los fotosintetizadores vegetales.
Principales resultados:
- Los hongos micorrizales incorporaron el 1% y respiraron el 3% de los productos de la fotosíntesis.
- Los nódulos bacterianos utilizaron entre el 7 y el 12% del producto de la fotosíntesis.
- La planta huésped de las legumbres aumentó su tasa de fotosíntesis para satisfacer las demandas microbianas.
Conclusiones:
- El huésped de las legumbres asigna activamente recursos significativos a sus socios simbióticos.
- El aumento de la fotosíntesis por parte de las legumbres compensa el costo de carbono de la simbiosis.
- El intercambio eficiente de recursos es crucial para el éxito de estas asociaciones simbióticas.
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