Affiliation:
1. Department of Plant Pathology, University of Illinois, Urbana, Illinois
Abstract
Gottlieb, David
(University of Illinois, Urbana),
and James L. Van Etten
. Changes in fungi with age. I. Chemical composition of
Rhizoctonia solani
and
Sclerotium bataticola
. J. Bacteriol.
91:
161–168. 1966.—The chemical composition of the mycelium of
Rhizoctonia solani
and
Sclerotium bataticola
was determined in cells of various ages. The percentage, per unit of dry weight, of soluble amino nitrogen, deoxyribonucleic acid (DNA), ribonucleic acid (RNA), ergosterol, and protein decreased with age in both fungi. Total lipids and fatty acids increased with age in
S. bataticola
but remained constant in
R. solani
. Total carbohydrate increased with age in
R. solani
and decreased in
S. bataticola
. Fewer changes with age were observed when the results were calculated in ratio to DNA. There was no change in the ratios of protein, RNA, and soluble amino nitrogen to DNA with age in either fungus, but the ergosterol-DNA ratio decreased. The total lipid-DNA ratio and the total fatty acid-DNA ratio increased with age in both fungi, whereas the total carbohydrate-DNA ratio increased in
R. solani
but remained constant in
S. bataticola
. Both fungi contained myristic, palmitic, palmitoleic, stearic, oleic, and linoleic acids. In addition,
R. solani
contained pentadecanoic acid, and
S. bataticola
had myristoleic, linolenic, and arachidic acids. No marked change in the fatty acid pattern of
S. bataticola
was observed with age, whereas in
R. solani
the percentage of linoleic acid per total fatty acids decreased slightly when oleic acid increased.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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