生物技术通报 ›› 2019, Vol. 35 ›› Issue (3): 78-86.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0795

• 研究报告 • 上一篇    下一篇

农林生态区土壤中的可培养芽胞杆菌资源调查——以四川省和重庆市部分地区为例

刘国红1, 刘琴英1,2, 刘波1, 车建美1, 陈倩倩1   

  1. 1.福建省农业科学院农业生物资源研究所,福州 350003;
    2. 福建师范大学生命科学学院,福州 350117
  • 收稿日期:2018-09-12 出版日期:2019-03-26 发布日期:2019-04-03
  • 作者简介:刘国红,女,博士,副研究员,研究方向:微生物资源研究与利用;E-mail:1iuguohong624@163.com
  • 基金资助:
    福建省自然科学基金项目(2016J01129),福建省农业科学院青年英才计划(YC2015-17)

Investigation of Bacillus Resources in the Soil of Agroforestry Biome:Case Study in Some Parts of Sichuan and Chongqing

LIU Guo-hong1, LIU Qin-ying1,2, LIU Bo1, CHE Jian-mei1, CHEN Qian-qian1   

  1. 1. Agricultural Bio-resources Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou 350003;
    2. College of Life Seience of Fujian Normal University,Fuzhou 350117
  • Received:2018-09-12 Published:2019-03-26 Online:2019-04-03

摘要: 调查了四川和重庆农林生态区土壤中的芽胞杆菌资源种群分布,为芽胞杆菌功能资源挖掘和菌剂开发提供基础。采用可培养法从农林生态区土壤中分离获得芽胞杆菌,利用细菌16S rRNA基因初步确定其分类地位,并通过多样性指数分析芽胞杆菌种群结构。结果表明,共分离获得芽胞杆菌95株,经16S rRNA基因鉴定,7个属38个种,其中芽胞杆菌属(Bacillus)22个种、赖氨酸芽胞杆菌属(Lysinbacillus)4个种、类芽胞杆菌属(Paenibacillus)7个种、短芽胞杆菌属(Brevibacillus)2个种、嗜冷芽胞杆菌属(Psychrobacillus)1个种、鲁梅尔芽胞杆菌属(Rummeliibacillus)1个种和虚构芽胞杆菌属(Fictibacillus)1个种。其中,6株芽胞杆菌与其最相近模式菌株的16S rRNA相似性低于98.65%,为潜在新种。农林生态区土壤芽胞杆菌多样性指数香农指数大小依次为乐山林地>盐亭县农地>重庆林地>盐亭县林地。以芽胞杆菌种类为样本,含量为指标,当欧式距离λ=15时,芽胞杆菌种类可分为高含量分布广型和低含量分布不均匀型。综上所述,农林生态区土壤蕴藏着较丰富的芽胞杆菌种类,为芽胞杆菌资源开发和利用提供了资源保障。

关键词: 芽胞杆菌, 农林生态区, 多样性, 16S rRNA 基因

Abstract: To provide a foundation for new resource mining of the Bacillus-like species and development of microbial agents,we investigated the species distribution and diversity of Bacillus-like isolates from soil samples in the agroforestry biome of Sichuan province and Chongqing city. Isolates Bacillus were obtained from the soil samples of agroforestry biome by cultural method,and identified based on 16S rRNA gene sequences. The community structure of the Bacillus-like bacteria was analyzed using the diversity index. A total of 95 Bacillus-like isolates were obtained from the 5 soil samples,and identified as 38 species belonging to 7 genera within Bacillaceae by 16S rRNA gene sequences. The species number of each genus was 22 for Bacillus,4 for Lysinibacillus,7 for Paenibacillus,2 for Brevibacillus,and 1 for Psychrobacillus,Rummeliibacillus and Fictibacillus respectively. And 16S rRNA similarities between 6 isolates and their most-closed type species were lower than 98.65 % of species defined threshold,indicating that these 6 isolates might be potential new Bacillus species. The order of Shannon index of Bacillus from the agroforestry biome was as forest land in Leshan > farmland in Yanting County > forest land in Zhong County > forest land Yanting County,respectively. According to Bacillus-like species and content,as Euclidean distance was about 15,Bacillus-like species could be divided into 2 clusters,i.e. high-content wide-distribution and low-content uneven-distribution. Thus,there are rich Bacillus-like species in the agroforestry biome,which offers the guarantees for the development and utilization of Bacillus-like resources.

Key words: Bacillus, agroforestry biome, diversity, 16S rRNA gene