Studies on δ-amino levulinic acid dehydratase in radish cotyledons during chloroplast development
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概要
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The subcellular localization and biosynthetic site of δ-amino levulinic acid dehydrates [EC 4.2.1.24, ALAD] were investigated in relation to chloroplast development in radish cotyledons. ALAD was mainly located in the chloroplasts and cytoplasm. Most of the ALAD in the chloroplasts was readily released by hypotonic shock. The enzyme was also found in the proplastids of etiolated cotyledons. The normal increase in the activity of ALAD in the chloroplasts as well as the cytoplasm was inhibited by cycloheximide but unaffected by D-threo chloramphenicol and kanamycin during the greening of radish cotyledons. We concluded that the ALAD in both the cytoplasm and chloroplasts was synthesized on the cytoplasmic 80S-ribosomes. This suggests that the ALAD formed on the 80S-ribosomes might be incorporated into chloroplasts during their development. When etiolated radish seedlings were illuminated, ALAD in both the cytoplasm and chloroplasts increased up to the point of the full development of the chloroplasts, and thereafter it decreased.
- 日本植物生理学会の論文
著者
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Ochiai Hideo
Laboratory Of Biochemistry College Of Agriculture Shimane University
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SHIBATA Hitoshi
Laboratory of Biochemistry, College of Agriculture, Shimane University
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Shibata Hitoshi
Laboratory Of Biochemistry College Of Agricidture Shimane University
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Shibata Hitoshi
Laboratory Of Biochemistry College Of Agriculture Shimane University
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Ochiai Hideo
Laboratory Of Applied Biological Science Faculty Of Agriculture Shimane University
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