南京林业大学学报(自然科学版) ›› 2013, Vol. 37 ›› Issue (06): 27-32.doi: 10.3969/j.issn.1000-2006.2013.06.006

• 研究论文 • 上一篇    下一篇

杂交竹梢枯病拮抗菌的筛选及抗菌蛋白分析

李姝江,梁 漫,朱天辉*,杨长青   

  1. 四川农业大学林学院,四川 雅安 625014
  • 出版日期:2013-12-18 发布日期:2013-12-18
  • 基金资助:
    收稿日期:2013-03-02 修回日期:2013-06-05
    基金项目:国家自然科技资源共享平台资助项目(2005DKA21207-13)
    第一作者:李姝江,博士。*通信作者:朱天辉,教授。E-mail: zhutianhui@yahoo.cn。
    引文格式:李姝江,梁漫,朱天辉,等. 杂交竹梢枯病拮抗菌的筛选及抗菌蛋白分析[J]. 南京林业大学学报:自然科学版,2013,37(6):27-32.

Selection of an antagonistic bacterium against Arthrinium phaeospermum and its antibacterial protein analysis

LI Shujiang, LIANG Man, ZHU Tianhui*, YANG Changqing   

  1. College of Forestry, Sichuan Agricultural University, Ya’an 625014, China
  • Online:2013-12-18 Published:2013-12-18

摘要: 从健康的撑×绿杂交竹上分离、筛选得到抗杂交竹梢枯病菌(Arthrinium phaeospermum)的强拮抗菌株YB15。根据形态特征、生理生化特性及16S rDNA序列分析,鉴定该菌株为贝莱斯芽孢杆菌(Bacillus velezensis)。通过硫酸铵分级沉淀、Sephadex G-50分子筛层析、High Q Sepharose Fast Flow强阴离子交换层析和Sephadex G-75分子筛层析,从发酵液中分离纯化出一种分子质量约为31.0 ku的抗菌蛋白。稳定性试验显示该抗菌蛋白对蛋白酶K和胰蛋白酶不敏感,耐热,不耐酸碱和紫外线,对有机溶剂敏感性存在差异。

Abstract: An antagonistic bacterial strain YB-15 against Arthrinium phaeospermum was isolated from Bambusa pervariabilis×Dendrocalamopsis grandis. The strain was identified as Bacillus velezensis by the morphological, physiological and biochemical characteristics, and 16SrDNA sequence analysis. One of the antibacterial protein was purified by using ammonium sulfate precipitation, the Sephadex G-50 chromatography, High Q Sepharose Fast Flow chromatography and Sephadex G-75 chromatography.The molecular weight of the antibacterial protein was estimated to be 31.0 ku by SDS-PAGE analysis.Stability test showed that the antibacterial protein was resistant to proteinase K and trypsin,thermal stable, sensitive to pH and ultraviolet, had different sensitivity to organic solvents.

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