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Updated: May 6, 2026

Observation of Photobehavior in Chlamydomonas reinhardtii
Published on: May 6, 2022
Studies on mutants deficient in the photosystem I reaction centers in Chlamydomonas reinhardtii
J Girard1, N H Chua, P Bennoun
1Institut de Biologie Physico-Chimique, 13, rue Pierre et Marie Curie, F-75005, Paris, France.
Abstract:
Genetic analysis of 25 nuclear mutants defective in the chlorophyll-protein complex CP1 was undertaken. The mutants belong to 13 complementation groups scattered throughout the nuclear genome. All these mutants lack the apoprotein of CP1 and, in addition, a specific set of six low molecular weight thylakoid polypeptides. System I particles obtained by treating WT thylakoid membranes with detergent specifically contain those polypeptides which the mutants lack. These observations suggest that a particular sub-structure of the thylakoid membrane associated with the photosystem I activity is missing from all 25 mutants studied, and that this general phenotype can result from mutation at any one of several unlinked Mendelian loci.
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