COMPARATIVE-STUDY OF DEVELOPMENT OF COMPATIBLE, INCOMPATIBLE, AND INDUCED INCOMPATIBLE INTERACTIONS BETWEEN COLLETOTRICHUM-SPP AND PHASEOLUS-VULGARIS

Interactions between fungal inducers of systemic protection and bean hypocotyls differ from one another and from interactions between cultivar-pathogenic races of C. lindemuthianum and protected tissue. The development of the challenge in systematically protected tissue is similar with all cultivars, all inducers, and all races of C. lindemuthianum used as challenge. No relationship exists between time sequences for inducing interactions and the time sequence for development and containment of the challenge in protected tissue. The extent of development of the challenge in protected tissue closely resembles the extent of development of a cultivar-pathogenic race of C. lindemuthianum in tissue that has acquired mature tissue resistance. These 2 forms of resistance may be closely related and may be distinct from race-specific resistance to C. lindemuthianum.