Journal
TRENDS IN PLANT SCIENCE
Volume 13, Issue 4, Pages 178-182Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2008.01.005
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Environmental stress enhances the extent of photoinhibition, a process that is determined by the balance between the rate of photodamage to photosystem 11 (PSII) and the rate of its repair. Recent investigations suggest that exposure to environmental stresses, such as salt, cold, moderate heat and oxidative stress, do not affect photodamage but inhibit the repair of PSII through suppression of the synthesis of PSII proteins. In particular, production of D1 protein is down-regulated at the translation step by the direct inactivation of the translation machinery and/or by primarily interrupting the fixation Of CO2. The latter results in the creation of reactive oxygen species (ROS), which in turn block the synthesis of PSII proteins in chloroplasts.
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