METABOLISM OF ARACHIDONIC-ACID INVOLVED IN ITS ELICITING ACTIVITY IN POTATO-TUBER

被引：15
|
作者：
CASTORIA, R [1 ]
FANELLI, C [1 ]
FABBRI, AA [1 ]
PASSI, S [1 ]
机构：
[1] OSPED S GALLICANO, IST FISIOTERAPICI OSPEDALIERI, I-00153 ROME, ITALY
来源：
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY | 1992年 / 41卷 / 02期
关键词：
D O I：
10.1016/0885-5765(92)90005-G
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
A 5-lipoxygenase from potato converts arachidonic acid (AA) to the unstable and reactive intermediate 5-S-hydroperoxyeicosatetraenoic acid (5-S-HPETE) which, at a concentration of 1 μg per tuber slice, induces phytoalexin accumulation to higher levels than those induced by AA at 20 μg per slice. However the tissue browning elicited by the 5-S-HPETE was lower than that elicited by AA, indicating that 5-S-HPETE may account for phytoalexin induction but not for the whole browning process. GC-MS analyses of lipid extracts of potato tuber slices treated with 1-[14C]AA and other polyunsaturated fatty acids showed no incorporation of these acids into potato lipid fractions. © 1992.
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页码：127 / 137
页数：11
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