天然产物研究与开发 ›› 2015, Vol. 27 ›› Issue (7): 1181-1186.doi: 10.16333/j.1001-6880.2015.07.011

• 研究简报 • 上一篇    下一篇

牛粪中纤维素降解菌的分离鉴定及其产酶研究

汪学军1,2*,闵长莉1,2,韩彭磊1,张丽君1   

  1. 1 皖西学院生物与制药工程学院;2 皖西学院大别山植物内生菌资源研究中心,六安 237012
  • 出版日期:2015-07-20 发布日期:2015-07-23

Isolation,Identification of a Cellulolytic Actinomycete from Cow Manure and Study on Its Cellulase-producing Conditions

WANG Xue-jun1,2*,MIN Chang-li1,2,HAN Peng-lei1,ZHANG Li-jun1   

  1. 1 College of Biotechnology and Pharmaceutical Engineering,West Anhui University;2 Research  Center for Endophytic Fungi Resources of Dabie Mountain,West Anhui University,Lu’an 237012, China
  • Online:2015-07-20 Published:2015-07-23

摘要: 采用仅含有羧甲基纤维素钠为碳源培养基从牛粪样品中分离纯化具有较强纤维素降解能力的菌株,通过生理生化特征研究、形态学和16S rDNA生物学手段对其分类鉴定,并对该菌株的产酶条件进行了初步研究。结果表明,从牛粪样品中筛选到一株降解纤维素能力较强的菌株NF38,分类鉴定结果显示,菌株NF38与浅紫链霉菌(Streptomyces violascens)最接近,初步将其鉴定为浅紫链霉菌(Streptomyces violascens);产酶性质研究表明,该菌株产纤维素酶活性在温度范围为30~40 ℃相对较高(最适温度35 ℃),pH范围7.0~8.0(最适pH 7.0),接种量范围5%~10%(最佳接种量5%),发酵时间在第7 d达到产酶高峰。菌株NF38在降解畜禽粪便方面具有一定的开发与应用潜力。

关键词: 牛粪, 纤维素降解菌, 鉴定, 浅紫链霉菌

Abstract: In this paper,strains with higher cellulose degrading ability were isolated from cow manure by only carboxymethyl cellulose-Na (CMC-Na) medium.The morphological,physiological and biochemical characteristics and 16S rDNA gene were analyzed to identify the taxonomic position of the strains.Moreover,their cellulase producing conditions were also studied.The results showed that a strain (NF38) that can degrade cellulose effectively was obtained.According to taxonomic identification,the strain NF38 was identified as Streptomyces violascens. When its fermentation temperature ranged from 30 to 40 ℃ (optimum at 35 ℃) and pH 7.0 to 8.0 (optimum at 7.0),and inoculation amount at 5%-10% (optimum at 5%),it had the highest enzyme activity.In addition,it took 7d to reach the peak of cellulase production.In conclusion,strain NF38 had potential in degrading animal manure.

Key words: cow manure, cellulose decomposing microorganisms, identification, Streptomyces violascens

中图分类号: 

Q939.96 Q814