期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 80, 期 -, 页码 278-284出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2014.04.007
关键词
Abiotic stress tolerance; Proline metabolism; Redox homeostasis; Reactive oxygen species (ROS); ROS signalling
资金
- Tunisian Ministry of Higher Education and Scientific Research [LR10CBBC02]
- Tunisian-French CMCU (Comite Mixte de Cooperation Universitaire) network [13G0929]
- European Union COST program [FA0901]
Reactive oxygen species (ROS) are continuously generated as a consequence of plant metabolic processes due to incomplete reduction of O-2. Previously considered to be only toxic by-products of metabolism, ROS are now known to act as second messengers in intracellular signalling cascades to trigger tolerance of various abiotic and biotic stresses. The accumulation of proline is frequently observed during the exposure of plants to adverse environmental conditions. Interestingly proline metabolism may also contribute to ROS formation in mitochondria, which play notably a role in hypersensitive response in plants, life-span extension in worms and tumor suppression in animals. Here we review current knowledge about the regulation of proline metabolism in response to environmental constraints and highlight the key role of ROS in the regulation of this metabolism. The impact of proline on ROS generation is also investigated. Deciphering and integrating these relationships at the whole plant level will bring new perspectives on how plants adapt to environmental stresses. (C) 2014 Elsevier Masson SAS. All rights reserved.
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