北极海洋沉积物中可培养细菌及其多样性分析  

Diversity analysis of culturable bacteria isolated from marine sediments of Arctic

作　　者：王桢[1] 李阳[1] 车帅[1] 林学政[1] 

机构地区：[1]国家海洋局第一海洋研究所国家海洋局海洋生物活性物质重点实验室,山东青岛266061

出　　处：《海洋学报》2014年第10期116-123,共8页

基　　金：南北极环境综合考察与评估专项(CHINARE2012-03-05;CHINARE2013-03-05)

摘　　要：利用Zobell 2216E培养基和涂布平板法对北极海洋沉积物中可培养细菌进行分离纯化,并利用16SrRNA基因进行分子鉴定与系统发育分析。根据菌落形态学特征,从59个站点的沉积物样品中共分离纯化获得570株细菌;基于16SrRNA基因的分子鉴定与系统发育分析表明,分离到的可培养细菌分别属于细菌域的4个门,5个纲,12个目,23个科,47个属,102个种,其中γ-Proteobactria占绝大多数;有14株菌株与模式菌株的16SrRNA基因序列相似性小于97%,为6个潜在的新种。北极海域的海洋沉积物中存在着丰富的微生物种质资源,为开发新型生物活性物质和特殊功能基因打下了基础。Culturable bacteria were isolated by use of marine Zobell 2216 Emedium and spread plate method.Molecular identification and phylogenetic analysis were carried out on the basis of 16 SrRNA gene.According to the distinct morphological character of bacterial colony on the marine Zobell 2216 Emedium plate,a total of 570 isolates were obtained from Arctic sediments.Molecular identification and phylogenetic analysis showed that these isolates belonged to four phylum of the bacteria domain,5classes,47 genera,and 102 species in total.14 isolates had 16 S rRNA gene similarity less than 97% with the closest type strain were grouped into 6clusters.It indicated that these isolates might be potential novel species.A high diversity of culturable bacteria were isolated from marine sediment of Arctic in term of both species number and phylogenetic composition,which deserves further study and exploitation,such as novel bioactive substances and functional genes.

关 键 词：北极 海洋沉积物 细菌多样性 系统发育分析 

分 类 号：P722.1[天文地球—海洋科学] P727