海洋学研究 ›› 2014, Vol. 32 ›› Issue (1): 90-97.DOI: 10.3969/j.issn.1001-909X.2014.01.011

• 研究报道 • 上一篇    下一篇

长江口可培养耐(嗜)盐细菌群落结构研究

孟凡旭1,2, 吴月红1,2, 金文静3, 王春生1,2, 许学伟1,2   

  1. 1.国家海洋局 海洋生态系统与生物地球化学重点实验室,浙江 杭州 310012;
    2.国家海洋局 第二海洋研究所,浙江 杭州 310012;
    3.浙江海洋学院 萧山校区基础部,浙江 杭州 311231
  • 收稿日期:2013-07-17 修回日期:2014-01-22 出版日期:2014-03-15 发布日期:2022-11-25
  • 作者简介:孟凡旭(1978-),男,河北玉田县人,博士,助理研究员,主要从事海洋微生物资源与应用方面的研究。E-mail: fanxumeng@sio.org.cn
  • 基金资助:
    国家海洋局第二海洋研究所基本科研业务费专项资金项目资助(JT1011,JG1025);中国近海海洋综合调查与评价项目(908-ZC-I-02)

Community of cultivable halophilic and halotolerant bacteria of the Changjiang River Estuary

MENG Fan-xu1,2, WU Yue-hong1,2, JIN Wen-jing3, WANG Chun-sheng1,2, XU Xue-wei1,2   

  1. 1. Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    2. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
    3. Department of Basic Courses, Xiaoshan Campus,Zhejiang Ocean University, Hangzhou 311231, China
  • Received:2013-07-17 Revised:2014-01-22 Online:2014-03-15 Published:2022-11-25

摘要: 针对长江口10个站位样品,采用HM培养基和ZMCA培养基分离培养耐(嗜)盐菌,通过PCR方法获取156株细菌的16S rDNA序列。其中,由HM培养基分离获得136株菌株,可划分为33个分类单元(OUT),分属α-变形菌纲(Alphaproteobacteria)、γ-变形菌纲(Gammaproteobacteria)和厚壁菌门(Firmicutes)的芽孢杆菌纲(Bacilli)3个类群,其中γ-变形菌纲为优势耐(嗜)盐细菌;靠近海岸的站点M5-1,N6-2和M4-1耐(嗜)盐细菌均属于厚壁菌门,而远离海岸的站点耐(嗜)盐细菌均属于变形菌门。以ZMCA培养基分离获得的20株菌株分属α-变形菌纲和放线菌纲(Actinobacteria),可划分为10个OTU。由HM培养基分离获得的菌株中,70.5%属于耐盐菌,29.5%属于中度嗜盐菌;由ZMCA培养基分离获得的菌株均为耐盐菌。HM培养基分离得到的136株细菌的硝酸盐和亚硝酸盐还原性分析表明,亚硝酸盐还原菌数量仅为硝酸盐还原菌的1/3左右。

关键词: 长江口, 耐盐菌, 嗜盐菌, 细菌群落

Abstract: Halophilic and halotolerant bacteria were isolated by media HM and ZMCA from seawater of ten sampling stations of the Changjiang River Estuary. Totally 156 16S rDNA sequences were obtained, of which 136 sequences were obtained from bacteria isolated by medium HM and the others from medium ZMCA. The bacteria from medium HM could be classified into 33 OUTs and they belonged to genus Oceanicola, Sagittula, Aurantimonas and Stappia within the class α-Proteobacteria; genus Alteromonas, Marinobacter and Pseudoalteromonas within the class γ-Proteobacteria and genus Bacillus, Gracilibacillus, Oceanobacillus, Halobacillus as well as Thalassobacillus within the class Bacilli of phylum Firmicutes. Strains isolated from stations M5-1, N6-2 and M4-1 which close to mainland were all belonged to Firmicutes, while strains isolated from stations far from mainland were all belonged to Proteobacteria. The bacteria isolated from medium ZMCA could be classified into 10 OUTs and they belonged to α-Proteobacteria and Actinobacteria. About 70.5% of the 136 strains isolated from medium HM could grow without NaCl and be classified as halotolerant bacteria. About 25.9% of the strains isolated from medium HM could grow in medium containing 0.5% NaCl but no growth was observed without NaCl and could be classified as moderately halophilic bacteria. While for the other 3.59% strains isolated from medium HM, no growth was observed in medium containing 0% or 0.5% NaCl, but growth was observed in media with 10% NaCl, which also could be classified as moderately halophilic bacteria. All strains isolated from medium ZMCA could grow without NaCl and be classified as halotolerant bacteria. 30.3% of strains isolated from medium HM could reduce nitrate, while only 9.9% of the strains could reduce nitrite.

Key words: Changjiang River Estuary, halophilic bacteria, halotolerant bacteria, bacterial community

中图分类号: