Mitochondrial redox biology and homeostasis in plants

• Published in: Trends in plant science Vol. 12; no. 3; pp. 125 - 134
• Main Authors: Noctor, Graham, De Paepe, Rosine, Foyer, Christine H.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2007; Elsevier
• Subjects: Apoptosis; Biological and medical sciences; Cellular Senescence; electron transport chain; Energy Metabolism; Fundamental and applied biological sciences. Psychology; Homeostasis; literature reviews; mitochondria; Mitochondria - metabolism; NADP - metabolism; Oxidation-Reduction; Plant Cells; plant physiology; Plant physiology and development; Plants - genetics; Plants - metabolism; reactive oxygen species; Reactive Oxygen Species - metabolism; redox reactions; Signal Transduction; Transformation, Genetic; Water and solutes. Absorption, translocation and permeability; Mitochondria; Homeostasis; Carbohydrate; Review; Metabolism; Photosynthesis; Chloroplast
• ISSN: 1360-1385; 1878-4372
• DOI: 10.1016/j.tplants.2007.01.005

Mitochondria are key players in plant cell redox homeostasis and signalling. Earlier concepts that regarded mitochondria as secondary to chloroplasts as the powerhouses of photosynthetic cells, with roles in cell proliferation, death and ageing described largely by analogy to animal paradigms, have been replaced by the new philosophy of integrated cellular energy and redox metabolism involving mitochondria and chloroplasts. Thanks to oxygenic photosynthesis, plant mitochondria often operate in an oxygen- and carbohydrate-rich environment. This rather unique environment necessitates extensive flexibility in electron transport pathways and associated NAD(P)-linked enzymes. In this review, mitochondrial redox metabolism is discussed in relation to the integrated cellular energy and redox function that controls plant cell biology and fate.