Abstract

The production of phytoalexins (determined as sativan and medicarpin) in leaf diffusates, leaf tissue and stem segments of lucerne cultivars resistant and susceptible to infection by Verticillium albo-atrum has been determined. No relationship between resistance and the formation of the antifungal compounds by leaves was observed. With stem segments, however, both the rates and amounts of phytoalexin synthesis were directly related to host resistance.

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