甘蔗渣淀粉功能降解菌筛选及s2g5-1和s3g4-8的鉴定

Screening of Starch-degrading Strains in Bagasse and Identification of Strains s2g5-1 and s3g4-8

[目的]筛选甘蔗淀粉功能降解菌,并对菌株s2g5-1和s3g4-8进行鉴定。[方法]利用多种选择性培养基,从自然发酵不同阶段的甘蔗渣中分离到多种淀粉分解菌,并对其进行初筛和复筛。[结果]获得了淀粉降解功能菌株s2g5-1和s3g4-8。通过形态、生理生化和分子综合鉴定得出s2g5-1和s3g4-8菌株均为解淀粉芽孢杆菌。[结论]该研究结果为甘蔗渣工厂化应用提供了理论依据。

[Objective]The study aimed to screen the starch-degrading bacterium in bagasse and carry on the identification of strains s2g5-1 and s3g4-8.[Method]By using a variety of selective media,varieties of starch degrading bacterium were isolated from the sugar cane bagasse form different stages of natural fermentation,then,primary screening and secondary screening were performed.[Result]Starch-degrading strains s2g5-1 and s3g4-8 were screened,and they were identified as Bacillus amyloliquefaciens according to their morphological,physiological,biochemical and molecular characteristics.[Conclusion]The research provided theoretical basis for factory application of bagasse.