Host-Pathogen Interactions: I. A Correlation Between alpha-Galactosidase Production and Virulence.

Plant Physiology
P D English, P Albersheim


Resistance or susceptibility of Red Kidney, Pinto and Small White beans (Phaseolus vulgaris) to the alpha, beta, and gamma strains of Colletotrichum lindemuthianum was either confirmed or established. These fungal strains secrete alpha-galactosidase, beta-galactosidase and beta-xylosidase when grown on cell walls isolated from the hypocotyls of any of the above bean varieties. These enzymes effectively degrade cell walls isolated from susceptible 5-day old hypocotyls but degrade only slightly the walls isolated from resistant 18-day old hypocotyls. The amounts of the beta-galactosidase and beta-xylosidase secreted by the 3 fungal strains are relatively low and are approximately equivalent. The secretion of these 2 enzymes is not dependent upon the bean variety from which the hypocotyl cell walls used as a carbon source were isolated. However, the fungal strains secrete greater amounts of alpha-galactosidase when grown on hypocotyl cell walls isolated from susceptible plants than when grown on walls from resistant plants. Virulent isolates of the fungus, when grown on hypocotyl cell walls isolated from a susceptible plant, secrete more alpha-galactosidase than do attenuated (avirulent) isolates of the same fungal strain grown un...Continue Reading


Jul 1, 1967·Plant Physiology·D J NevinsP Albersheim
Jun 1, 1968·Plant Physiology·D J NevinsP Albersheim

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Jul 30, 2016·European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology·R SenR K De

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