Quenching of Chlorophyll a Fluorescence by Oxygen in Normal Air in Maize Leaves Grown under Nitrogen Deficiency Conditions
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概要
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We have studied the influence of oxygen removal on the chlorophyll fluorescence induction in maize leaves, grown in control(c)and nitrogen deficient (-N)plots. The removal of oxygen from the air surrounding maize leaves led to the increase of all the fluorescence induction transients, in which the M_1-maximum was most sensitive to the oxygen removal. The increase in the P-peak and M_1-maximum was related to the relaxation of PSII and NADPH oxidation by oxygen through the PQ pool in normal air during adaptation of maize leaves to the exciting blue light. The oxidation of PSII and NADPH by oxygen involves the oxygen end(oxidation of PQ pool by oxygen) of chlororespiration, which was higher in the maize leaves in the-N plot. We concluded that the PQ pool oxidation by oxygen at the beginning of illumination prevents overreduction of the electron transport chain in maize leaves, when the activity of the Calvin cycle decreases.
- 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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