Oxidative stress in cyanobacteria英文电子书.pdf

R E V I E W A R T I C L E Oxidative stress in cyanobacteria Amel Latifi, Marion Ruiz Cheng-Cai Zhang ´ ´ Aix-Marseille Universite and Laboratoire de Chimie Bacterienne, CNRS-UPR9043, Marseille, France Correspondence: Amel Latifi, Aix-Marseille Abstract ´ Universite and Laboratoire de Chimie ´ Reactive oxygen species (ROS) are byproducts of aerobic metabolism and potent Bacterienne, CNRS-UPR9043, 31 chemin Joseph Aiguier, 13402 Marseille, Cedex 20, agents that cause oxidative damage. In oxygenic photosynthetic organisms such as France. Tel.: 10033 4 91 16 41 88; cyanobacteria, ROS are inevitably generated by photosynthetic electron transport, fax: 10033 4 91 71 89 14; e-mail: especially when the intensity of light-driven electron transport outpaces the rate of latifi@rs-mrs.fr electron consumption during CO2 fixation. Because cyanobacteria in their natural habitat are often exposed to changing external conditions, such as drastic Received 7 May 2008; revised 14 August 2008; fluctuations of light intensities, their ability to perceive ROS and to rapidly initiate accepted 18 August 2008. antioxidant defences is crucial for their survival. This review summarizes recent First published online 25 September 2008. findings and outlines important perspectives in this field. DOI:10.1111/j.1574-6976.2008.00134.x Editor: Ferran Garcia-Pichel Keywords cyanobacteria; photosynthesis; reactive oxygen species; antioxidants; transcriptional regulation. unpaired electron that