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Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology >
Vol.24 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10466/3011

Title: Ecologic and Taxonomic Studies on Pythium as Pathogenic Soil Fungi : XIII. Further Studies on "Macerating Enzyme" Involved in Virulence of Pythium
Authors: ICHITANI, Takio
Issue Date: 31-Mar-1972
Publisher: University of Osaka Prefecture
Citation: Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology. 1972, 24, p.17-24
Abstract: 1. There were no differences in aggressiveness among the different species of Pythium with different degree of pathogenicity. 2. "Macerating enzyme" activity of Pythium in vitro varied with culture medium and was not always correlated to its virulence. There was, however, a possible correlation of the enzyme when produced only by highly virulent and when a large number of Pythium was used. 3. "Macerating enzyme" activity in extracts of potato tissue decayed by Pythium was correlated to the virulence of the fungus. Maximum macerating activity of extracts obtained from tubers decayed by highly virulent Pythium was reached more rapidly within a limited period of time than by moderately virulent one. 4. All organisms used even in slightly virulent Pythium, except for avirulent one, were able to penetrate into freshly wounded potato tubers and produced soft rot.
URI: http://hdl.handle.net/10466/3011
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