Metabolic profiling of oxylipins upon salicylate treatment in barley leaves — preferential induction of the reductase pathway by salicylate1

FEBS Letters - Tập 464 Số 3 - Trang 133-137 - 1999
Heiko Weichert1, Irene Stenzel1, Ekkehardt Berndt1, Claus Wasternack1, Ivo Feußner1
1Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale, Germany

Tóm tắt

In barley leaves, 13‐lipoxygenases (13‐LOXs) are induced by salicylate (SA) and jasmonate. Here, we show by metabolic profiling that upon SA treatment, free linolenic acid and linoleic acid accumulate in a 10:1 ratio reflecting their relative occurrence in leaf tissues. Furthermore, 13‐LOX‐derived products are formed and specifically directed into the reductase branch of the LOX pathway leading mainly to the accumulation of (13S,9Z,11E,15Z)‐13‐hydroxy‐9,11,15‐octadecatrienoic acid (13‐HOT). Under these conditions, no accumulation of other products of the LOX pathway has been found. Moreover, exogenously applied 13‐HOT led to PR1b expression suggesting for the time a role of hydroxy polyenoic fatty acid derivatives in plant defense reactions.

Từ khóa


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FEBS Letters

Tập 464 Số 3

133-137

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