In order to isolate thermophilic compost-promoting bacteria with high activity of cellulase and xylanase, spent mushroom substrates with sawdust were collected from mushroom cultivation farm, Jinju, Gyeongnam in Korea. Among of the isolates, one strain, designated HJ01 was selected by agar diffusion method. The strain HJ01 was identified as members of the Bacillus subtilis by biochemical characteristics using Bacillus ID kit and VITEK 2 system. Comparative 16S rDNA gene sequence analysis showed that strain HJ01 formed a distinct phylogenetic tree within the genus Bacillus and was most closely related to Bacillus subtilis with 16S rDNA gene sequence similarity of 99.3%. On the basis of its physiological properties, biochemical characteristics and phylogenetic distinctiveness, strain HJ01 was classified within the genus Bacillus, for which the name Bacillus subtilis HJ0 is proposed. The cellulase and xylanase activity of B. subtilis HJ0 was slightly increased according to bacterial population from exponential phase to stationary phase in growth curve for B. subtilis HJ01.

• Park Hyun Ji(Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea)
• Pyung Gyun Shin( Division of Mushroom Research, International Institute of Horticultural & Herhal Science, RDA, Suwon, 441-707, Korea) | Pyung Gyun Shin
• Young Bok Yoo( Division of Mushroom Research, International Institute of Horticultural & Herhal Science, RDA, Suwon, 441-707, Korea) | Young Bok Yoo
• Young Un Cho( Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea) | Young Un Cho
• Soo Jeong Cho( Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea) | Soo Jeong Cho