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Sporotrichum thermophile Growth, Cellulose Degradation, and Cellulase Activity

Bhat, MK and Maheshwari, Ramesh (1987) Sporotrichum thermophile Growth, Cellulose Degradation, and Cellulase Activity. In: Applied and Environmental Microbiology, 53 (9). pp. 2175-2182.

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The activity of components of the extracellular cellulase system of the thermophilic fungus Sporotrichum thermophile showed appreciable differences between strains; I-glucosidase (EC was the most variable component. Although its endoglucanase (EC and exoglucanase (EC activities were markedly lower, S. thermophile degraded cellulose faster than Trichoderma reesei. The production of I-glucosidase lagged behind that of endoglucanase and exoglucanase. The latter activities were produced during active growth. When growth was inhibited by cycloheximide treatment, the hydrolysis of cellulose was lower than in the control in spite of the presence of both endoglucanase and exoglucanase activities in the culture medium. Degradation of cellulose was a growth-associated process, with cellulase preparations hydrolyzing cellulose only to a limited extent. The growth rate and cell density of S. thermophile were similar in media containing cellulose or glucose. A distinctive feature of fungal development in media incorporating cellulose or lactose (inducers of cellulase activity) was the rapid differentiation of reproductive units and autolysis of hyphal cells to liberate propagules which were capable of renewing growth immediately.

Item Type: Journal Article
Publication: Applied and Environmental Microbiology
Publisher: American Society for Microbiology
Additional Information: Copyright of this article belongs to American Society for Microbiology.
Department/Centre: Division of Biological Sciences > Biochemistry
Date Deposited: 17 Jun 2008
Last Modified: 07 Oct 2010 07:19
URI: http://eprints.iisc.ac.in/id/eprint/14465

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