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Metabolic profiling of oxylipins upon salicylate treatment in barley leaves--preferential induction of the reductase pathway by salicylate(1).
- Source :
-
FEBS letters [FEBS Lett] 1999 Dec 31; Vol. 464 (3), pp. 133-7. - Publication Year :
- 1999
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 0014-5793
- Volume :
- 464
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- FEBS letters
- Publication Type :
- Academic Journal
- Accession number :
- 10618492
- Full Text :
- https://doi.org/10.1016/s0014-5793(99)01697-x