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The Pectinase of Sclerotinia cinerea

George W. Muhleman
Botanical Gazette
Vol. 80, No. 3 (Nov., 1925), pp. 325-330
Stable URL: http://www.jstor.org/stable/2556630
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Pectinase of Sclerotinia cinerea
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Abstract

1. Spore formation and methods of inoculating withspores and with mycelium are discussed. 2. Methods of growing the fungus on different media are described. 3. One growth of fungus seems to unfit prune juice for growing further crops. 4. Methods of preparing culture media which gave maximum growth are described. 5. Three different methods of preparing an active pectinase solution are compared. 6. Sclerotinia cinerea does not excrete pectinase into the culture media. 7. The disks used in testing maceration were 0.5 mm. thick, and werefrom apples, plums, peaches, and potatoes. The tensile strength was determined with the fingers. 8. It has been demonstrated that the color of the felts of Sclerotinia cinerea is a good index of the activity of the pectinase solution which may be prepared. 9. The specific gravity of prune juice has been studied.

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