食品科学

• 生物工程 • 上一篇    下一篇

海芦笋内生真菌基于PKS Ⅰ型功能基因的分离与鉴定

刘怡君,潘 沐,王明洋,王 惠,辛志宏   

  1. 南京农业大学食品科技学院,江苏 南京 210095
  • 出版日期:2014-06-15 发布日期:2014-07-03

Isolation and Identification Based on Type I PKS Functional Gene of Endophyte from Salicornia bigelovii

LIU Yi-jun, PAN Mu, WANG Ming-yang, WANG Hui, XIN Zhi-hong   

  1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2014-06-15 Published:2014-07-03

摘要:

以采自新疆盐湖的野生海芦笋为研究对象,以聚酮合成酶(polyketide synthase,PKS)Ⅰ型功能基因为指标,采用平板划线技术、斜面分离纯化技术分离内生真菌,从中筛选出1 株含有PKS Ⅰ型基因、编号为Salix 1的内生真菌,进而PCR扩增该菌的18S rDNA和ITS1-5.8S-ITS2 rDNA目标序列,在美国国立生物技术信息中心(NationalCenter of Biotechnology Information,NCBI)上进行同源性分析,构建系统发育树,结合形态学观察,将菌株Salix1鉴定为杂色曲霉。

关键词: 海芦笋, 内生真菌, PKS Ⅰ型基因, 分离鉴定

Abstract:

In this study, a fungal endophyte with type Ⅰ polyketide synthase (PKS) named as Salix 1 was isolated from
wild Salicornia bigelovii collected from a salt lake in Xinjiang by streak plate and slant culture methods. The 18S rDNA and
ITS1-5.8S-ITS2 rDNA sequences from the strain were amplified by PCR and sequenced for sequence homology analysis
using NCBI BLAST, and phylogenetic trees were constructed. Based on phylogenetic analysis combined with morphological
observation, the strain Salix 1 was identified as Aspergillus versicolor.

Key words: Salicornia bigelovii, endophyte, type Ⅰ PKS gene, isolation and identification