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Chlorophyll b-Deficient Mutants of Rice: II. Antenna Chlorophyll a/b-Proteins of Photosystem I and II |
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| Authors: | Terao Tomio; Yamashita Atsushi; Katoh Sakae |
| Institution: | 1Department of Applied Physiology, National Institute of Agrobiological Resources Tsukuba Science City, Ibaragi 305, Japan 2Department of Moleculer Biology, National Institute of Agrobiological Resources Tsukuba Science City, Ibaragi 305, Japan 3Department of Pure and Applied Sciences, College of Arts and Sciences, University of Tokyo Komaba, Meguroku, Tokyo 153, Japan |
| Abstract: | Chlorophyll-protein complexes of the wild type and 16 strainsof chlorina mutants of rice were investigated by gel electrophoresis.An antenna chlorophyll a/b-protein of photosystem II (LHC-II)was present in reduced amounts in Type II chlorina mutants whichhave the chlorophyll a/b ratios of 10–15, and was totallyabsent from Type I chlorina mutants which lack chlorophyll b.Another antenna chlorophyll-protein of photosystem I (LHC-I)containing two polypeptides of 20 and 21 kDa was also presentin the Type II mutants but not in the Type I mutants. The polypeptideprofiles of the thylakoid membranes indicate that Type I mutantslack both the 20 and 21 kDa polypeptides, whereas the abundanceof the two polypeptides relative to the CPI apoprotein in theType II mutants is comparable with that in the wild type. Itis concluded that the 20 and 21 kDa polypeptides are both relatedto LHC-I and are normally synthesized and accumulated in theType II mutants. (Received June 6, 1985; Accepted August 6, 1985) |
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