Effects of kinetin to plant pathogenic fungi

Abstract

Spore germination of Fusarium solani f. pisi and Cochliobolus miyabeanus was stimulated by addition of 25 and 50 ppm kinetin or benzylkinetin to those spore suspensions, on the other hand that of Botrytis fabae and Botrytis cinerea was inhibited. Exudation of pisatin, a phytoalexin of garden pea from the plant, in the diffusate upon the pea pods was slighly enhanced by the inoculation of F. solani f. pisi spore suspension containing 25 ppm benzylkinetin. These results indicate that the stimulation of spore germination by benzylkinetin is correlated with the increase of pisatin exudation.