Details

Autor(en) / Beteiligte

• Walters, D.R
• Cowley, T
• Weber, H
• Nashaat, N.I

Titel

Changes in oxylipins in compatible and incompatible interactions betwen oilseed rape and the downy mildew pathogen Peronospora parasitica

Ist Teil von

• Physiological and molecular plant pathology, 2005, Vol.67 (3-5), p.268-273

Erscheinungsjahr

2005

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In compatible and incompatible interactions between oilseed rape Brassica napus and the downy mildew pathogen Peronospora parasitica, three oxylipins were detected. Two of these compounds were trihydroxy oxylipins (9,12,13-trihydroxy-10(E)-octadecenoic acid TriHOE1 and 9,12,13-trihydroxy-10(E),15(Z)-octadecenoic acid TriHOE2) derived from the 9-lipoxygenase (LOX) pathway, while the other was (13S,9Z,11E,15Z)-13-hydroxy-9,11,15-octadecatrienoic acid 13-HOT, derived from the 13-LOX pathway. In incompatible interactions, the three oxylipins appeared 12 h after inoculation, with concentrations of 13-HOT, for example, of 59 nmol g(-1) FW. Concentrations of the three oxylipins fell to considerably lower levels 96 h after inoculation in incompatible interactions. In contrast, the oxylipins did not appear in compatible interactions until at least 48 h after inoculation and concentrations were much lower than those obtained in the incompatible interactions. The possibility that these oxylipins might be involved in signalling and/or as antimicrobial compounds in oilseed rape resisting infection by P. parasitica is discussed.