Characterization of cellulase secretion and Cre1-mediated carbon source repression in the potential lignocellulose-degrading strain Trichoderma asperellum T-1.

ABSTRACT: Trichoderma asperellum, a traditional bio-control species, was demonstrated to be an excellent candidate for lignocellulose degradation in this work. Comparing to the representatively industrial strain of Trichoderma reeseiQM6a, T. asperellum T-1 showed more robust growth, stronger spore production, faster secretion of lignocellulose-decomposing enzymes and better pH tolerance. The reducing sugar released by strain T-1 on the second day of fermentation was 87% higher than that of strain QM6a, although the maximum reducing sugar yield and the cellulase production persistence of the strain T-1 were lower. Our experiment found that the cellulase secretion was strongly inhibited by glucose, suggesting the existence of carbon source repression pathway in T. asperellum T-1. The inhibiting effect

SUBMITTER: Wang Q 

PROVIDER: S-EPMC4351060 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature