Results and discussion
Determination of carbon source
Lignocellulosic biomass, including miscanthus straw, barely straw, rice straw and corn stover was used as a carbon source of the fermentation medium. In this investigation, a suitable carbon source was determined for the highest cellulase production.
Fig. 1 shows that corn stover gave the highest activity of CMCase (0.731 Unit/ml), while rice straw gave the lowest activity of CMCase (0.399 Unit/ml). The growth of fungi and cellulase activity are influenced by the composition and degree of complexity of the substrate which inhibit or induce the biosynthesis of cellulase [18]. Finally, corn stover was determined as the carbon source of the fermentation medium for further experiment.