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Studies in pectic enzymes of parasitic fungi

III. Secretion of pectic enzymes byPenicillium expansum link

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Proceedings / Indian Academy of Sciences

Summary

Highly active protopectinase and polygalacturonase (PG) enzymes were secreted byPenicillium expansum Link. on 2·5% decoction of lucerne, pectin asparagin and modified Czapek’s media. Ammonium nitrate was found to be a better nitrogen source for the secretion of pectic enzymes than asparagin or sodium nitrate. Best secretion of protopectinase was in cultures after 4 days incubation at 20° C.

Pectin-esterase, when tested at 6·2 pH, was found to be of negligible activity in 4 days old cultures of the fungus.

Protopectinase and polygalacturonase (PG) were found to be adaptive enzymes which were not produced in absence of pectic substances.

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Authors and Affiliations

  1. Botany Department, D.S.B. Government College, Naini Tal

    S. C. Gupta

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  1. S. C. Gupta
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Additional information

Communicated by Prof. T. S. Sadasivan,f.a.sc.

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Gupta, S.C. Studies in pectic enzymes of parasitic fungi. Proc. Indian Acad. Sci. 52, 103–109 (1960). https://doi.org/10.1007/BF03050100

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  • DOI: https://doi.org/10.1007/BF03050100

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