Effects of 5-Aminolevulinic Acid on the Accumulation of Chlorophyll b and Apoproteins of the Light-Harvesting Chlorophyll a/b-Protein Complex of Photosystem II
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概要
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The effects were examined of 5-aminolevulinic acid (ALA) on the accumulation of Chl and apoproteins of light-harvesting Chl a/b-protein complex of photosystem II (LHCII) in cucumber cotyledons under intermittent light. A supply of ALA preferentially increased the accumulation of Chl a during intermittent illumination. However, when cotyledons were pretreated with a brief exposure to light or benzyladenine (BA), the stimulatory effect of ALA on the increase in the level of Chl b was greater than that in the level of Chl a, resulting in decreased ratios of Chl a/b. Time-course experiments with preilluminated cotyledons revealed that LHCII apoproteins accumulated rapidly within the first 30 min of intermittent illumination with a decline during sub-sequent incubation in darkness. A supply of ALA did not affect the accumulation of LHCII apoproteins during the intermittent light period, but it efficiently inhibited the decline in their levels during the subsequent darkness. After exposure to a single pulse of light of BA-treated cotyledons, the prompt increase in levels of LHCII apoproteins was not accompanied by the formation of Chl b, which began to accumulate later. The pattern of changes in levels of LHCII apoproteins was quite similar to that in levels of Chl a. These results suggest that LHCII apoproteins are first stabilized by binding with Chl a and that an increased supply of Chl a and the accumulation of LHCII apoproteins are prerequisites for the formation of Chl b.
- 日本植物生理学会の論文
著者
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TANAKA Ayumi
Department of Materials Science and Engineering, Faculty of Engineering and Resource Science, Akita
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Tanaka Yoshito
Department of Chemistry, Faculty of Science and Technology, Meijo University
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Tsuji Hideo
Department of Botany, Faculty of Science, Kyoto University
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TANAKA Akira
Plantech Res Inst.
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Tsuji H
Department Of Botany Faculty Of Science Kyoto University:(present)department Of Biology Kobe Women&a
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Tsuji Hideo
Department Of Biology Kobe Women's University
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Tanaka Ayumi
Department Of Materials Science And Engineering Faculty Of Engineering And Resource Science Akita Un
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Tanaka Ayumi
Department Of Food And Nutrition Japan Women's University
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Tanaka Yoshito
Department Of Biological Sciences The Nishi Tokyo University
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Tanaka Ayumi
Department Of Botany Faculty Of Science Kyoto University
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