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La volatilización del amoníaco a partir de hojas envejecidas de maíz
Science (New York, N.Y.)
|March 23, 1979
Resumen
Las plantas de maíz liberan amoníaco durante la senescencia en el aire normal, contrariamente a las expectativas. Esta emisión de amoníaco ocurre incluso con la fotosíntesis activa, desafiando los hallazgos previos de alta concentración.
Área de la Ciencia:
- Ciencias de las plantas Ciencias de las plantas.
- Ciencias del medio ambiente Ciencias del medio ambiente.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La dinámica del amoníaco (NH3) en las interacciones entre las plantas y la atmósfera es crucial para el ciclo del nitrógeno del ecosistema.
- Estudios anteriores se centraron principalmente en la absorción de amoníaco por las plantas bajo altas concentraciones ambientales de NH3.
- El comportamiento de las plantas con respecto al intercambio de amoníaco en condiciones normales de aire sigue siendo menos entendido.
Objetivo del estudio:
- Para investigar el intercambio de amoníaco entre las plantas de maíz y la atmósfera en condiciones normales de aire.
- Para determinar si las plantas de maíz absorben o liberan amoníaco durante la senescencia.
- Para evaluar la influencia de la fotosíntesis activa en la liberación de amoníaco.
Principales métodos:
- Experimentos en entornos controlados con plantas de maíz (Zea mays).
- Medición del flujo de amoníaco mediante cromatografía de gases.
- Monitoreo de la senescencia de las plantas y la actividad fotosintética.
Principales resultados:
- Las plantas de maíz que crecen en el aire normal liberan amoníaco.
- Se observó la liberación de amoníaco durante la senescencia de las plantas.
- Se produjo una emisión significativa de amoníaco a pesar de la fotosíntesis activa.
Conclusiones:
- Las plantas pueden ser una fuente de amoníaco atmosférico, particularmente durante la senescencia en el aire normal.
- Este hallazgo contrasta con el conocimiento establecido basado en estudios de altas concentraciones de amoníaco.
- El estudio pone de relieve la complejidad de las interacciones planta-amoniaco y su papel en el ciclo del nitrógeno.
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