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La señalización del ácido abscísico a través de la ADP-ribosa cíclica en las plantas

Y Wu¹, J Kuzma, E Maréchal

¹Laboratory of Plant Molecular Biology, Rockefeller University, 1230 York Avenue, New York, NY 10021-6399, USA.

Science (New York, N.Y.)

|February 12, 1998

Resumen

El ácido abscísico (ABA) desencadena las respuestas de estrés de las plantas. Los investigadores encontraron que la ADP-ribosa cíclica (cADPR) actúa como una molécula de señalización clave en este proceso, involucrando al calcio.

Área de la Ciencia:

Biología vegetal Biología vegetal
La señalización molecular.
Fisiología del estrés Fisiología del estrés

Sus antecedentes:

El ácido abscísico (ABA) es una hormona vegetal crucial que regula las respuestas a las tensiones ambientales como la sequía y la salinidad.
Comprender las vías de transducción de señales de ABA es vital para mejorar la resiliencia de los cultivos.

Objetivo del estudio:

Para identificar los intermediarios de señalización en la transducción de señales del ácido abscísico (ABA).
Investigar el papel de la ADP-ribosa cíclica (cADPR) en las respuestas al estrés mediadas por ABA.

Principales métodos:

Se realizaron experimentos de microinyección de una sola célula en plantas de tomate.
Se realizaron bioensayos en Arabidopsis thaliana para medir los niveles de cADPR.

Principales resultados:

La ADP-ribosa cíclica (cADPR) fue identificada como una molécula de señalización en la respuesta ABA, actuando a través del calcio.
El tratamiento con ABA condujo a un aumento de los niveles de cADPR en Arabidopsis thaliana.
El cADPR elevado precedió a la expresión génica inducida por ABA.

Conclusiones:

La ADP-ribosa cíclica (cADPR) es una molécula de señalización significativa en las vías del ácido abscísico (ABA).
El calcio media los efectos de la cADPR en la transducción de la señal ABA.
cADPR juega un papel en las primeras etapas de la expresión génica inducida por ABA en las plantas.

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