Affiliation:
1. Laboratory of Soil Microbiology, Department of Agronomy, Cornell University, Ithaca, New York
Abstract
Potgieter
, H. J. (Cornell University, Ithaca, N.Y.),
and M. Alexander
. Susceptibility and resistance of several fungi to microbial lysis. J. Bacteriol.
91:
1526–1532. 1966.—Strains of
Streptomyces, Nocardia
, and
Pseudomonas
capable of lysing hyphae of
Fusarium solani
or
Neurospora crassa
were obtained by selective culture, but attempts to isolate an organism lysing
Rhizoctonia solani
failed. When provided with
F. solani
or
N. crassa
as carbon sources, the actinomycetes tested produced β-(1 → 3) glucanase and chitinase. A mixture containing purified chitinase and β-(1 → 3) glucanase induced spheroplast formation in
F. solani
, caused some morphological changes in
N. crassa
, but had almost no effect on
R. solani
hyphae. The polysaccharides in
R. solani
walls, which contain a large amount of glucose as well as galactose, mannose, and glucosamine, were not hydrolyzed appreciably by the two enzymes. Laminaribiose and laminaritriose were released by enzymatic hydrolysis of
F. solani
and
N. crassa
walls, and gentiobiose was liberated from
R. solani
and
N. crassa
walls. Melaninlike materials were found in
R. solani
walls, accounting for 8.50% of the wall weight. A role for melanin in protecting hyphae from microbial lysis is suggested.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
Cited by
145 articles.
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