Effect of piperonyl butoxide and diphenylamine on lipid peroxidation in ozonated chloroplasts

概要

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Lipid peroxide (LPO) formation was remarkable when isolated tobacco chloroplasts were bubbled with high concentrations of ozone, though the fatty acid composition and the fractionation pattern of glycolipids and phospholipids in the chloroplast lipids changed little after ozone fumigation of the leaves. Piperonyl butoxide (PB), a potent protectant against ozone injury, strongly inhibited LPO formation in ozonated chloroplasts. PB also prevented ozone-induced decreases in the amounts of linolenic and linoleic acids in the chloroplast lipids. These results suggest that PB inhibition of LPO formation may be involved in the protective mechanism against ozone phytotoxicity. However, the mode of PB action differed of some points from that of diphenylamine, which is an antioxidant and also effective against ozone injury. The mode of PB action is discussed.
日本植物生理学会の論文