Drought stress and reactive oxygen species: Production, scavenging and signaling

Abstract : As sessile organisms, plants have evolved mechanisms that allow them to adapt and survive periods of drought stress. One of the inevitable consequences of drought stress is enhanced ROS production in the different cellular compartments, namely in the chloroplasts, the peroxisomes and the mitochondria. This enhanced ROS production is however kept under tight control by a versatile and cooperative antioxidant system that modulates intracellular ROS concentration and sets the redox‑status of the cell. Furthermore, ROS enhancement under stress functions as an alarm signal that triggers acclimatory/defense responses by specific signal transduction pathways that involve H2O2 as secondary messenger. ROS signaling is linked to ABA, Ca2+ fluxes and sugar sensing and is likely to be involved both upstream and downstream of the ABA‑dependent signaling pathways under drought stress. Nevertheless, if drought stress is prolonged over to a certain extent, ROS production will overwhelm the scavenging action of the antioxidant system resulting in extensive cellular damage and death.
Type de document :
Article dans une revue
Plant Signaling & Behavior, 2008, 3 (3), pp.156-165
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Contributeur : Maria Cruz de Carvalho <>
Soumis le : mardi 24 mars 2009 - 14:51:19
Dernière modification le : mercredi 21 mars 2018 - 18:57:30


  • HAL Id : bioemco-00370490, version 1



Maria Cruz de Carvalho. Drought stress and reactive oxygen species: Production, scavenging and signaling. Plant Signaling & Behavior, 2008, 3 (3), pp.156-165. 〈bioemco-00370490〉



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