Abstract

Chloroplasts from a barley mutant lacking both chlorophyll b and chlorophyll-protein complex II(CPC-II) show cation-induced changes in the fluorescence yield of chlorophyll a. It is concluded that CPC-II is not essential for cation control of the distribution of energy between the two photosystems. The lower extents of the cation effects with the mutant chloroplasts may possibly be related to the smaller degree of membrane appression.

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