Quenching of Chlorophyll a Fluorescence by Oxygen in Normal Air in Higher Plant Leaves
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概要
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The influence of oxygen removal on chlorophyll fluorescence induction was studied in higher plant leaves. Removal of oxygen from the air surrounding maize leaves led to the increase of the fluorescence intensity and to a delay of the time at which the P-peak and M_1-maximum appeared. The oxygen removal also led to the increase of the fluorescence intensity and induction period in C_3 plants including soybean, reed, sasa, and Maackia amurensis. The slow quenching of fluorescence induction in these C_3 plants was more sensitive to oxygen removal than in the case of maize. Simultaneous measurement of fluorescence andOxygen evolution induction in Closed leaf discs showed that a greater part of the slow quenching, including the appearance of M_1-maximum, takes place without oxygen evoluton or CO_2-dependent electron transport. Therefore, it is concluded that oxygen in normal air is the main fluorescence quencher during the fluorescence induction in higher plant leaves ; near the P-peak and M_1-maximum oxygen can oxidize PSII and NADPH, through the intersystem electron pool.
- 一般社団法人日本土壌肥料学会の論文
著者
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OSAKI Mitsuru
Laboratory of Ecological Chemistry, Division of Applied Bioscience, Graduate School of Agriculture,
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Tadano Toshiaki
Laboratory Of Plant Nutrition Faculty Of Agriculture Hokkaido University
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Damdinsuren S
National Univ. Of Mongolia
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Damdinsuren Sodov
Laboratory of Plant Nutrition, Faculty of Agriculture, Hokkaido University
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