Interaccion
Transcript of Interaccion
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Interacciones planta Microorganismo
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Las plantas como hábitats microbianos
Las raíces de las plantas son hábitat propicios para el desarrollo
de microorganismos.
Las interacciones entre los microorganismos del suelo y las raíces
de las plantas satisfacen requerimientos nutricionales básicos
para las plantas y para las comunidades microbianas asociadas
a ellas.
La temperatura de las plantas varía mucho tanto a lo largo del
día como del año.
Los sistemas de comunicación interna del vegetal están muy
poco desarrollados
La trasferencia de microorganismos dentro de la planta es
ineficiente.
Las partes de las plantas que emergen del suelo están sujetas a
frecuentes desecaciones.
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Interacción con las raíces de las plantas
Las raíces de las plantas tienen una influencia directa en
la composición y densidad de la microbiota.
Relación R/S: 5-20.
Depende de cada planta y de su estado de madurez.
Mayor proporción de microorganismos Gram (-), móviles,
de crecimiento rápido (aporte de materiales orgánicos).
Microorganismos autótrofos.
Mayor actividad microbiana: menores tiempo de
generación y aumento en la velocidad de transformación
de nutrientes (mineralización, desnitrificación).
Cambios sucesivos a lo largo del desarrollo de la planta.
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