The role of antioxidant enzymes in photoprotection.

Photosynthesis Research
Barry A LoganA Scott Holaday

Abstract

The enzymatic component of the antioxidant system is discussed as one of the defensive mechanisms providing protection against excessive light absorption in plants. We present an analysis of attempts to improve stress tolerance by means of the creation of transgenic plants with elevated antioxidant enzyme activities and conclude that the effect of such transgenic manipulation strongly depends on the manner in which the stress is imposed. The following factors may diminish the differences in photosynthetic performance between transgenic plants and wild type under field conditions: effective functioning of the thermal dissipation mechanisms providing a primary line of defense against excessive light, long-term adjustments of the antioxidant system and other photoprotective mechanisms, the relatively low level of control over electron transport exerted by the Water-Water cycle, especially under warm conditions, and a decrease in the content of the transgenic product during leaf aging.

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Citations

Nov 4, 2010·Plant Physiology·Christine H Foyer, Shigeru Shigeoka
Jan 14, 2009·Pakistan Journal of Biological Sciences : PJBS·F KhosravinejadT Farboodnia
May 6, 2014·Journal of Photochemistry and Photobiology. B, Biology·Majd DarwishHuguette Sallanon
Nov 28, 2012·Journal of Integrative Plant Biology·Xia ZhangTai Wang
Jan 22, 2014·Journal of Photochemistry and Photobiology. B, Biology·Abin Sebastian, M N V Prasad
Jul 22, 2016·Colloids and Surfaces. B, Biointerfaces·Olga E ShapovalovaVladimir V Vinogradov
Sep 29, 2007·Journal of Theoretical Biology·H Martin Schaefer, Kevin S Gould
Aug 19, 2017·Scientific Reports·Diana Marcela Arias-MorenoPablo Delgado-Sánchez
Aug 3, 2021·Frontiers in Plant Science·Seung Yong ShinHyo-Jun Lee

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