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. 1994 Jun;60(6):1822–1826. doi: 10.1128/aem.60.6.1822-1826.1994

Effect of Host Diet and Hindgut Microbial Composition on Cellulolytic Activity in the Hindgut of the American Cockroach, Periplaneta americana

Huub J Gijzen 1,†, Chris van der Drift 2, Martin Barugahare 1, Huub J M op den Camp 2,*
PMCID: PMC201568  PMID: 16349275

Abstract

Cellulase activity measured as filter paper digesting activity (FPase) and carboxymethyl cellulase (CMCase) was demonstrated in hindgut extracts of the cockroach Periplaneta americana. The highest activities measured amounted to 0.89 and 0.12 U · ml-1 for CMCase and FPase, respectively. The cellulolytic capacity of the hindgut population increased dramatically when protozoa were present, and the activities were found to vary depending on the feeding regimen. Cellulose-rich diets induced high protozoal numbers, resulting in a high cellulase activity. A close correlation was found between the number of Nyctotherus ovalis organisms, the major protozoans in the hindgut, and both FPase and CMCase activity. Since the numbers of this protozoan also correlated with the methane production of the insect, it appears that N. ovalis is responsible for the major part of cellulolytic and methanogenic activity found in the hindgut of P. americana.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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