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Secretion of Extracellular Enzymes by Verticillium psalliotae Treschow and Verticillium lecanii (Zimm.) Viégas During Growth on Uredospores of the Soybean Rust Fungus ( Phakopsora pachyrhizi Syd.) in Liquid Cultures
Author(s) -
Saksirirat W.,
Hoppe H.H.
Publication year - 1991
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1991.tb04741.x
Subject(s) - biology , chitinase , verticillium dahliae , microbiology and biotechnology , protease , glucanase , rhizoctonia , botany , fungi imperfecti , fungus , phakopsora pachyrhizi , enzyme , rhizoctonia solani , biochemistry , fungicide
Two isolates of the mycoparasite Verticillium psalliotae grew rapidly in liquid cultures on autoclaved uredospores of the soybean rust fungus ( Phakopsora pachyrhizi Syd.) as sole carbon source and secreted β‐l,3‐glucanase, chitinase, and protease activities into the medium. One isolate of Verticillium lecanii grew slowly, failed to produce measurable chitinase activity and secreted lower specific activities of β‐l,3‐glucanase and protease, compared with V. psalliotae . The tested isolates of V. psalliotae and V. lecanii produced comparable levels of lipolytic activity. Amylolytic activity was secreted by V. lecanii but not by V. psalliotae . The isolates of V. psalliotae and V. lecanii used in our experiments differed clearly in protein and protease pattern, determined by electrophoresis on polyacrylamide gels. The results indicate that the rapid growth of V. psalliotae on autoclaved uredospores in liquid culture and on uredosori is probably based primarily on nutrients made available to the mycoparasite by activities of β‐1,3‐glucanases, chitinases and proteases.