Abstract

6-Methoxymellein (6-MM) accumulation in carrot root slices was inhibited by the free radical scavengers salicylhydroxamic acid (SHAM) and propyl gallate (PG). 6-MM accumulation was insensitive to KCN. Linoleic acid and lipoxygenase products of linoleic acid inhibited germination and growth of the carrot pathogen Botrytis cinerea. SHAM and PG induced susceptibility in carrot slices to B. cinerea. A possible role is discussed for fatty-acid peroxy radicals in the mechanism of 6-MM accumulation, and the resistance response in carrot slices to B. cinerea.

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