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

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• 作者：Laura De Gara ; Vittoria Locato ; Silvio Dipierro ; Maria C. de Pinto
• 关键词：Oxygen ; Reactive oxygen species ; Redox homeostasis ; Ascorbate ; Ascorbate peroxidase
• 刊名：Respiratory Physiology & Neurobiology
• 出版年：2010
• 出版时间：31 August 2010
• 年：2010
• 卷：173
• 期：Supplement 1
• 页码：S13-S19
• 全文大小：330 K

文摘

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.