Abstract
To reutilize rice straw immediately during the agricultural production process, an actinomycete named
JSD-1 was isolated from soil and rotten straw using multiple selective culture media. It was identified as
Streptomyces griseorubens through polyphasic taxonomy consisting of morphological and
physiological characterization combined with the result of 16S rDNA gene sequence and phylogenetic
analysis. It also released a series of enzymes, including cellulase, pectinase, xylanase and ligninase
simultaneously. According to the experiment of weight loss, JSD-1 decomposed about 76% of the straw
in 30 days. Besides, it had the ability to resist certain plant diseases, such as Sclerotinia rot of melon
and so on. It was obviously that JSD-1 could degrade rice straw effectively and had great potential of
being applied to the utilization of straw resource.
Key words: Rice straw, Utilization, Streptomyces griseorubens, Polyphasic taxonomy, enzymes, weight loss,
diseases.
