Journal of Photoscience
- 제9권2호
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- Pages.59-62
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- 2002
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- 1225-8555(pISSN)
Dark-chilling Pretreatment Protects PSI from Light-chilling Damage
- Kudoh, Hideki (Department of Integrated Biosciences, The University of Tokyo) ;
- Sonoike, Kintake (Department of Integrated Biosciences, The University of Tokyo)
- 발행 : 2002.08.01
초록
In chilling-sensitive plants, the donor side of Photosystem II is inhibited by the chilling treatment in the dark, while the acceptor side of Photosystem I is inhibited by the chilling under the moderate light. Since the addition of inhibitors of electron transfer from Photosystem II protects Photosystem I from chilling induced photoinhibition of Photosystem I, inhibition or down-regulation of Photosystem II activity in vivo may also protect Photosystem I from photoinhibition. It was revealed that dark-chilling pretreatment actually protected Photosystem I from photoinhibition. The results imply that down-regulation of Photosystem II under stress conditions may have a role to protect Photosystem I from photoinhibition.