文献类型：期刊文献

中文题名：胡杨根际细菌提高木本植物对重金属胁迫的耐受性

英文题名：Rhizospheria bacteria of Poplus euphratica improve resistance of wood plants to heavy metals

作者：陈雯[1];欧阳立明[1];孔沛筠[1];杨泽宇[1];吴蔚[1];朱冬林[1];张利莉[2]

机构：[1]华东理工大学生物工程学院,上海200237;[2]塔里木大学生命科学学院,新疆阿拉尔843300

年份：2015

卷号：26

期号：9

起止页码：2811

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：26785565);CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；PubMed;

基金：华东理工大学上海市级大学生创新活动项目(S13079);新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室开放课题(BRZD1203)资助

语种：中文

中文关键词：重金属;胡杨;根际细菌;竹柳;植物促生菌

外文关键词：heavy metal; Populus euphratica; rhizosphere bacteria; Salix maizhokung garensis; plant growth-promoting bacteria（PGPB）

摘要：胡杨是我国西北荒漠地区特有的、对多种非生物逆境具有高抗逆性的树种,但其相关微生物的生态和生理功能研究还比较缺乏.本文从新疆沙雅地区原始胡杨林根际土壤中分离出重金属抗性细菌共72株.其中具有单一重金属(Cu2+、Ni2+、Pb2+或Zn2+)抗性的细菌菌株50株,有三重以上重金属抗性的菌株9株.将其中5株多重重金属抗性细菌接种至生根的竹柳插条,进行重金属胁迫下的盆栽培养.结果表明:在铜或锌胁迫下,5株多重重金属抗性细菌对竹柳的生长抑制有不同程度的缓解,其中假单胞菌Z30和贪铜菌N8菌对铜和锌两种胁迫下竹柳生物量的增长与不接菌对照相比均达到显著差异水平.说明在非重金属污染区生长的胡杨根际存在多样性的重金属抗性细菌,其中一些多重重金属抗性菌对改善重金属胁迫下植物的生长有显著作用,具有应用于木本植物-微生物联合修复环境重金属污染的价值.
Populus euphratica is a special kind of woody plant,which lives in desert area of northwestern China and is strongly resistant to multiple abiotic stresses. However,the knowledge about the ecology and physiological roles of microbes associated with P. euphratica is still not enough. In this paper,we isolated 72 strains resistant to heavy metals from rhizospheric soil of wild P. euphratica forest in Shaya County of Xinjiang. There were 50 strains conveying resistance to one of four heavy metals（ Cu^2＋,Ni^2＋,Pb^2＋or Zn^2＋）,and 9 strains were resistant to at least three kinds of these heavy metals. Five of the multi-heavy metal resistant bacteria were inoculated to bamboo willow and the growth inhibition of plant under stresses of Cu2＋or Zn2＋was found to be alleviated to different extent. Among the 5 strains,Pseudomonas sp. Z30 and Cupriavidus sp. N8 significantly improved the growth of plant under stresses of both zinc and copper when compared to the uninoculated controls. The results showed the diversity of heavy metal resistant bacteria associated with P. euphratica which lived in a non-heavy metal polluted area and some of the multi-heavy metal resistant bacteria may greatly improve the growth of host plant under heavy metal stress. The PGPB associated with P. euphratica has potential application in the xylophyte-microbe remediation of environmental heavy metal pollution.