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PRODUCTION OF PECTIC ENZYMES BY PATHOGENIC AND SYMBIOTIC RHIZOCTONIA STRAINS
Author(s) -
PÉROMBELON M.,
HADLEY G.
Publication year - 1965
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1965.tb05382.x
Subject(s) - mycelium , pectin , rhizoctonia , biology , enzyme , endophyte , pectinase , microbiology and biotechnology , botany , biochemistry , rhizoctonia solani
S ummary Five strains of Rhizoctonia , selected for their symbiotic and/or pathogenic characteristics, were investigated with regard to growth and pectic enzyme production in culture. Growth patterns of the strains were similar on glucose and pectin carbon sources, pectin being less efficient than glucose in terms of mycelial dry weight produced. Assays of endopolymethylgalacturonase, endopolygalacturonase and protopectinase in culture filtrates showed that on pectin media all of these enzymes were produced by each of the strains although the relative degree of activity varied. Enzyme production by the orchid endophyte strains used was no less than, and in one case was far greater than, that by the pathogenic strains. The significance of these results is discussed with regard to host/endophyte relationships.