Abstract

Saponins are glycosylated plant secondary metabolites with potent antifungal properties that occur in many major food crops. The isolation of mutants defective in saponin biosynthesis represents a powerful strategy for evaluating the importance of these compounds in plant defense. A recent study has confirmed that saponin-deficient mutants of a diploid oat species, Avena strigosa, are indeed compromised in their resistance to a variety of fungal pathogens. Proc. Natl. Acad. Sci. U. S. A. (1999) 96, 12923–12928.

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