生物技术通报 ›› 2014, Vol. 0 ›› Issue (3): 106-110.

• 研究报告 • 上一篇    下一篇

发酵床中纤维素降解菌的分离与鉴定

廖青1, 江泽普1, 邢颖1, 韦广泼1, 黄东亮2,3, 李杨瑞3   

  1. (1.广西农业科学院农业资源与环境研究所,南宁 530007;2.广西农业科学院甘蔗研究所,南宁 530007;3.广西甘蔗遗传改良重点实验室,南宁 530007)
  • 收稿日期:2013-10-22 出版日期:2014-03-29 发布日期:2014-03-31
  • 作者简介:廖青,女,助理研究员,研究方向:农田环境与生态;E-mail:liaoqing81@163.com
  • 基金资助:
    广西农业科学院科技发展基金项目(桂农科2012JM10)

Isolation and Identification of Cellulose-Decomposing Microorganisms in Deep-litter System

Liao Qing1, Jiang Zhepu1, Xingying1, Wei Guangpo1, Huang Dongliang2,3, Li Yangrui3   

  1. (1. Agricultural Resources and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007;2.Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007;3. Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning 530007)
  • Received:2013-10-22 Published:2014-03-29 Online:2014-03-31

摘要: 从发酵床垫料中初步分离出43株纤维素降解菌。采用刚果红鉴别培养基及滤纸条培养基初筛,得到5株透明圈较大且使滤纸条产生崩解的菌株,通过进一步液体发酵,测定其CMC酶活、FPA酶活和天然纤维素酶活,获得2株具有较高纤维素降解活性菌株,并分别命名为F7和F21。经16S rRNA基因序列分子生物学鉴定和系统发育分析表明,这2株纤维素降解菌分别归属为枯草芽孢杆菌(Bacillus subtilis)和链霉菌(Streptomyces sp.)。

关键词: 发酵床, 纤维素降解菌, 筛选, 16S, rDNA, 鉴定

Abstract: 43 cellulose-decomposing microorganisms were isolated from deep-litter systems. Five of them, with bigger transparent circles and disintegration effect of filter paper piece were screened using Congo red differential medium and filter paper method. Then 2 strains with higher capacity of decomposing cellulose were obtained by determinations of CMC enzyme activity, FPA enzyme activity and natural cellulase activity, and named as F5 and F21, respectively. The 2 strains were identifined as Bacillus subtilis and Streptomyces sp. basing on 16S rDNA phylogenetic analysis.

Key words: Deep-litter system, Cellulose-decomposing microorganisms, Screening, 16S, rDNA, Identification