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KMID : 0368420120550020093
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Journal of Plant Biology
2012 Volume.55 No. 2 p.93 ~ p.101
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Photosynthesis and Environments: Photoinhibition and Repair Mechanisms in Plants
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Goh Chang-Hyo
Ko Suk-Min
Koh Seok-Chan
Kim Young-Joo
Bae Hyeun-Jong
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Abstract
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Photoinhibition is the inhibition of photosynthesis by excessive light resulting in the reduction of plant growth. Exposure to additional stress factors during exposure to light increases the potential for photoinhibitory effects. Reversible photoinhibition is indicative of a protective mechanism aimed at dissipating excess light energy, while irreversible photoinhibition indicates damage to the photosynthetic systems. The present review summarizes the physiological mechanisms of photoinhibition and discusses the interaction between light and other stress factors. In addition, some of the features and strategies that help plants avoid or restrict the occurrence of photoinhibition are analyzed. Most of these defense mechanisms are associated with the dissipation of excessive energy such as heat. Therefore, these mechanisms would regulate the carbon available to the plant by the output ratio of ATP/NADPH to the stressful environmental conditions. Understanding these mechanisms can help avoid plant cell death and increase plant productivity.
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KEYWORD
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ATP, Environments, NADP(H), Photoinhibition, Photoprotection, Photosynthesis, Recovery
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