铜胁迫下菌株CL01促进紫云英生长的研究  

Growth-Promoting Effect of Strain CL01 on stragalus sinicus under Copper Stress Condition

作　　者：程国军[1] 曾小波[1] 周艳琳[1] 田梦洋[1] 

机构地区：[1]中南民族大学生命科学学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2014年第2期28-31,共4页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(30800021)

摘　　要：从湖北某矿区植物根际土壤中筛选到了一株多种重金属抗性菌株CL01.根据形态学特征和16S rDNA序列比较了结果,鉴定其为Achromobacter xylosoxidans.当土壤所含铜浓度为75 mg/kg时,接种菌株CL01可以促进紫云英根延长,增加植株高度,提高紫云英的生物量.菌株CL01通过减少根际土壤可吸收的铜含量,减少了铜在紫云英根部的聚集,说明该细菌提高了植物的抗铜能力.A heavy metal resistant strain CL01 was isolated from the rhizosphere soil of a heavy-metal mine area in Hubei Province. The strain was identified as Achromobacter xylosoxidans based on the morphological characteristics and an analysis of the 16S rDNA sequence. With 75 mg/kg Cu2＋ in the soil, inoculation with the CL01 enhanced root growth could increase plant height and the weight of biomass. It revealed that CL01 significantly decreased Cu accumulation in the roots. Thus by reducing the amount of absorbable Cu in rhizosphere soils, copper resistance of plants was improved.

关 键 词：植物生长促进菌种 重金属抗性 鉴定 生物量 铜胁迫 

分 类 号：S154.3[农业科学—土壤学]