<報文>ホウレン草における光合成電子伝達反応活性へのオゾン被爆の影響(III)

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Effects of ozone on the photosynthetic capacity of chloroplasts isolated from spinach leaves were investigated. The expriment was carried out in the following two ways. 1) After the fumigation of spinach with ozone, the chloroplasts were isolated and photosynthetic capaclty was measured. 2)Ozone was bubbled into a suspension of the isolated chloroplasts and the photosynthetic capacity was measured. Electron transport rates in photosystemⅠ (DCPIPH₂→MV, with DCMU), photosystemⅡ (H₂O→FeCy) and the total photosystem (H₂O→MV) were determined as a measure of the photosynthetic capacity. Electron transport in the photosystemⅡ was more inhibited by ozone than in photosystemⅠ both in basal chloroplasts and uncoupled chloroplasts. Ozone bubbling effect on the cyclic photo-phosphorylation and H^+ concentration gradient was also investigated.
横浜国立大学の論文