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Isolation and Identification of Highly Efficient Degrading Strain of Cellulose in Ramie

A cellulose degrading strain J04 was isolated from rotting ramie straws by using sodium carboxymethylcellulose as a sole carbon source and identified as Bacillus cereus by morphological observation combined with 16 S r RNA gene sequencing. The results showed that the optimal temperature and p H for cellulase producing of J04 was 42 ℃ and 7.0, respectively. The highest cellulase activity reached 24.3 U / m L when J04 was grown in a ramie fiber medium for 4 days. About45.1% was degraded after 8-days incubation under the optimal conditions.