Direct evidence for the existence of phosphatidylcholine hydroperoxide (PCOOH) and the determination of the changes in PCOOH after treatment of soybean seedlings with fungal elicitor, were examined using chemiluminescence-HPLC of hydroperoxide specific assay. PCOOH was transiently accumulated within 6 h after elicitor treatment but such an event was not observed in control plants, thus suggesting that accumulation of PCOOH was a response to fungal elicitor in the host plant. The result suggested that singlet oxygen had participated in the lipid hydroperoxidation, since non-conjugated fatty acid hydroperoxide isomers due to the singlet oxygen oxidation were detected in the phospholipid fraction. The reaction of lipid hydroperoxidation, precedding the induction of a defense compound, may be involved in the triggering of a plant defense mechanism against fungal invasion.
|ジャーナル||Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism|
|出版ステータス||Published - 1992 8 19|
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