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Respir Physiol Neurobiol. 2010 Aug 31;173 Suppl:S13-9. doi: 10.1016/j.resp.2010.02.007. Epub 2010 Feb 24.

Redox homeostasis in plants. The challenge of living with endogenous oxygen production.

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  • 1Centro Integrato di Ricerca, Universit√† Campus Bio-Medico di Roma, via A. del Portillo 21, Rome, Italy. l.degara@unicampus.it


Plants are not only obligate aerobic organisms requiring oxygen for mitochondrial energy production, but also produce oxygen during photosynthesis. Therefore, plant cells have to cope with a hyperoxic cellular environment that determines a production of reactive oxygen species (ROS) higher than the one occurring in animal cells. In order to maintain redox homeostasis under control, plants evolved a particularly complex and redundant ROS-scavenging system, in which enzymes and metabolites are linked in a network of reactions. This review gives an overview of the mechanisms active in plant cells for controlling redox homeostasis during optimal growth conditions, when ROS are produced in a steady-state low amount, and during stress conditions, when ROS production is increased. Particular attention is paid to the aspects of oxygen/ROS management for which plant and animal cells differ.

Copyright (c) 2010 Elsevier B.V. All rights reserved.

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