Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 71:35-39 (1983)
© 1983 American Society of Plant Biologists

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Articles

Nuclear Suppressors of the Photosensitivity Associated with Defective Photosynthesis in Chlamydomonas reinhardii1

Robert J. Spreitzer and William L. Ogren

Department of Agriculture, Agricultural Research Service, University of Illinois, Urbana, Illinois 61801, Department of Agronomy, University of Illinois, Urbana, Illinois 61801

Several nuclear mutations were recovered that suppress the photosensitivity associated with the Chamydomonas reinhardii chloroplast mutant rcl-u-1-10-6C, which is defective in ribulose-1,5-bisphosphate carboxylase/oxygenase. Two of the suppressor mutations affect other components of photosynthesis. These results show that suppressors of photosensitivity are sufficiently common to permit the recovery of photosensitive, photosynthesis-deficient mutants in bright light, and indicate that photosynthesis-deficient mutants selected and maintained in the light may accumulate suppressors which can confuse the biochemical analysis of lesions in photosynthesis. One of the suppressor mutations inhibits photosystem II activity, indicating that photosensitivity can be mediated by partial reactions of the photosynthetic electron transport chain.

1 Supported by a Rockefeller Foundation postdoctoral fellowship to R. J. S.




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 Proc. Natl. Acad. Sci. USAHome page
I. Khrebtukova and R. J. Spreitzer
Elimination of the Chlamydomonas gene family that encodes the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase
PNAS, November 26, 1996; 93(24): 13689 - 13693.
[Abstract] [Full Text] [PDF]


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Copyright © 1983 by the American Society of Plant Biologists