生物技术通报 ›› 2013, Vol. 0 ›› Issue (7): 131-135.

• 研究报告 • 上一篇    下一篇

一株高产糖化酶生产菌的筛选与鉴定

张文丽1 于寒松1,2 朴春红1 胡鑫3 王舒婷1 胡耀辉1,2   

  1. (1.吉林农业大学食品科学与工程学院,长春 130118;2.国家大豆产业技术研发中心加工研究室,长春 130118; 3.吉林大学,长春 130118)
  • 收稿日期:2013-02-05 修回日期:2013-07-19 出版日期:2013-07-19 发布日期:2013-09-02
  • 作者简介:张文丽,女,硕士研究生,研究方向:发酵工程;E-mail:zhangwenli1863@126.com
  • 基金资助:

    现代农业产业技术体系建设专项资金(CARS-04)

Screening and Identification of a High-yield Glucoamylase Bacteria

Zhang Wenli1 Yu Hansong1,2 Piao Chunhong1  Hu Xin3  Wang Shuting1 Hu Yaohui1,2   

  1. (1. College of Food Science and Technology,Jilin Agricultural University,Changchun 130118;2. National Soybean Industrial Technology R & D Center Processing Laboratory,Changchun 130118;3.Jilin University, Changchun 130118)
  • Received:2013-02-05 Revised:2013-07-19 Published:2013-07-19 Online:2013-09-02

摘要:

从吉林某豆制品加工厂污水排放口处的土样中,采用稀释平板法从中分离筛选得到一株高产糖化酶菌株ZWL-1(18S rDNA基因的 GenBank 登录号:KC433410)。在进行形态观察的基础上,结合18S rDNA序列分析并建立系统发育树进一步对该菌进行了种类鉴定。18S rDNA序列分析表明,菌株ZWL-1与黑曲霉(Aspergillus niger)的18S rDNA的同源性均在99.0%以上;从构建的系统进化树中可以看出,ZWL-1与Aspergillus sp. LQ21共同构成一个分支,并与黑曲霉(Aspergillus niger strain CS1-1)聚成一大支,最终确定该菌株为黑曲霉。

关键词: 18S, rDNA, 筛选, 鉴定, 黑曲霉, 糖化酶

Abstract:

An high-yield glucoamylase bacterial strain of ZWL-1(GenBank accession number of the 18S rDNA gene:KC433410)used dilution plate method was isolated from a soy processing plant in Jilin sewage outfall at soil samples . The species identification was made on it, on the basis of morphological observation and through 18S rDNA sequence analysis further to the bacterial strain. The 18S rDNA sequence shows that the homology of this bacterial strain and the18S rDNA of Aspergillus niger was above 99.0%. As shown in the phylogenetic tree, strain ZWL-1 and Aspergillus sp. LQ21 constituted a branch and they constituted a high-order branch together with Aspergillus niger strain.CS1-1. Thus, the primary identification proved that this bacterial strain is Aspergillus niger.

Key words: 18S rDNA Screening Identification, Aspergillus niger, Glucoamylase