The effect of the steroid plant hormone 24-epibrassinolide on the content and composition of
complex oxylipins in plants was studied for the first time
, using f lax as a model plant. In plants treated with
the plant hormone, as well as in plants inoculated with
Pectobacterium atrosepticum
, the content of linolipins
(galactolipids containing divinyl ether residues) increased. Hormonal pretreatment of the plants with subse-
quent infection resulted in a more significant accumulati
on of linolipins B (21-fold) and A (2.8-fold) as com-
pared to the untreated (control) plants. The data suggest
that brassinosteroids are involved in the regulation
of the formation of complex oxylipins in pathogenesis of plants.

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