Ionic Balance during Malic Acid Accumulation in Vacuoles of a CAM Plant, Graptopetalum paraguayense
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概要
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We studied the ionic balance during diurnal changes in the levels of accumulated malic acid and hydrogen ion in the vacuoles of Graptopetalum paraguayense, a crassulacean acid metabolism (CAM) plant. There was a clear diurnal rhythm of the pH and the total malic acid content, but the amount of negative charges due to the unprotonated carboxyl groups of malic acid remained approximately constant. The negative charges were balanced by the positive charges of cations, which were also constant throughout the diurnal CAM rhythm. The results gave evidence for the electroneutrality of the translocation of the malic acid and protons across the tonoplast membrane.
- 日本植物生理学会の論文
著者
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ARATA Hiroyuki
Department of Biology, Graduate School of Sciences, Kyushu University
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Nishimura Mitsuo
Department of Biology, Faculty of Science, Kyushu University
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Nishimura M
Dept. Cell Biol. Nat. Inst. Basic Biol.
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Nishimura Mitsuo
Departmcnt Of Biology Faculty Of Science Kyushu University
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Arata H
Department Of Biology Graduate School Of Sciences Kyushu University
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Iwasaki I
Akita Prefectural Univ. Akita Jpn
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Iwasaki Ikuko
Department Of Bio-resource Science Akita Prefectural University
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