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Simultaneous regulation of antenna size and photosystem I/II stoichiometry in Arabidopsis thaliana

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タイトル: Simultaneous regulation of antenna size and photosystem I/II stoichiometry in Arabidopsis thaliana
著者: Jia, Ting 著作を一覧する
Ito, Hisashi 著作を一覧する
Tanaka, Ayumi 著作を一覧する
キーワード: Chlorophyll a oxygenase
Chlorophyll b
Peripheral antenna complexes
Photosystem reassembly
Photosystem stoichiometry
発行日: 2016年 7月 9日
出版者: Springer
誌名: Planta
巻: 244
号: 5
開始ページ: 1041
終了ページ: 1053
出版社 DOI: 10.1007/s00425-016-2568-5
抄録: Main conclusionThe photosystem I/II ratio increased when antenna size was enlarged by transient induction of CAO in chlorophyll b -less mutants, thus indicating simultaneous regulation of antenna size and photosystem I/II stoichiometry. Regulation of antenna size and photosystem I/II stoichiometry is an indispensable strategy for plants to acclimate to changes to light environments. When plants grown in high-light conditions are transferred to low-light conditions, the peripheral antennae of photosystems are enlarged. A change in the photosystem I/II ratio is also observed under the same light conditions. However, our knowledge of the correlation between antenna size modulation and variation in photosystem I/II stoichiometry remains limited. In this study, chlorophyll a oxygenase was transiently induced in Arabidopsis thaliana chlorophyll b-less mutants, ch1-1, to alter the antenna size without changing environmental conditions. In addition to the accumulation of chlorophyll b, the levels of the peripheral antenna complexes of both photosystems gradually increased, and these were assembled to the core antenna of both photosystems. However, the antenna size of photosystem II was greater than that of photosystem I. Immunoblot analysis of core antenna proteins showed that the number of photosystem I increased, but not that of photosystem II, resulting in an increase in the photosystem I/II ratio. These results clearly indicate that antenna size adjustment was coupled with changes in photosystem I/II stoichiometry. Based on these results, the physiological importance of simultaneous regulation of antenna size and photosystem I/II stoichiometry is discussed in relation to acclimation to light conditions.
Rights: The final publication is available at Springer via http://dx.doi.org/10.1007/s00425-016-2568-5
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/66518
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 伊藤 寿

 

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