Radiationless transitions as a protection mechanism against photoinhibition in higher plants and a red alga

Exposure of the red alga Porphyra perforata or leaves of Phytolacca americana and Echinodorus sp. to white light equivalent to full sunlight for short periods induced large decreases of variable fluorescence measured at 695 nm at 77K. This change was not produced by photoinhibition but rather appear...

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Bibliographic Details
Published in:Photosynthesis research 1986, Vol.10 (3), p.327-333
Main Authors: FORK, D. C, BOSE, S, HERBERT, S. K
Format: Article
Language:English
Subjects:
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Metabolism
Photosynthesis, respiration. Anabolism, catabolism
Plant physiology and development
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Summary:Exposure of the red alga Porphyra perforata or leaves of Phytolacca americana and Echinodorus sp. to white light equivalent to full sunlight for short periods induced large decreases of variable fluorescence measured at 695 nm at 77K. This change was not produced by photoinhibition but rather appeared to result from an inorease in the rate constant of radiationless transition in the reaction centers of photosystem II. It is proposed that this increase is related to the formation of the high energy state which serves as a photoprotective mechanism in plants.
ISSN:0166-8595
1573-5079
DOI:10.1007/BF00118298