外源微生物强化蓖麻对铅的吸收与积累研究  

Effect of Lead-tolerant Bacteria on Lead Uptake and Accumulation by Ricinus communis L.

作　　者：谭贵娥[1] 何池全[1] 陆晓怡[1] 

机构地区：[1]上海大学环境科学与工程系,上海200072

出　　处：《农业环境科学学报》2008年第1期82-85,共4页Journal of Agro-Environment Science

基　　金：上海市科委科技攻关项目(06dz12301);上海市教委重点学科建设基金资助项目(G642);上海市第二期重点学科(T0105)

摘　　要：采用温室盆栽(土壤Pb浓度为300mg·kg-1)试验,将3株Pb抗性菌株——蜡样芽孢杆菌(Bacillus cereus)、枯草芽孢杆菌(Bacillus subtilis)和铜绿假单胞菌(Pseudomonas aeruginosa)分别接种于蓖麻根际,研究铅抗性菌株对蓖麻吸收积累铅的影响。结果表明,蜡样芽孢杆菌、枯草芽孢杆菌和铜绿假单胞菌处理的植物地上部Pb吸收量分别比对照增加40%、18%和19%(P<0.05)。这说明上述细菌对蓖麻积累Pb均有促进作用,外源微生物对强化蓖麻修复铅污染土壤具有一定的潜力。A pot experiment with soil amended with Pb（NO3）2 （300 mg Pb .kg^-1soil） was carried out to study the effect of three Pb-tolerant bacterial strains, Bacillus cereus, Bacillus subtilis and Pseudorrugnas aeruginosa on Pb uptake and accumulation by Ricinus communis L. The results showed that B.subtilis and P.aeruginosa did not significantly change the shoot biomass ofR. communis, but B.cereus increased the shoot biomass of plant compared to non-inoculated plants（P〈0.05）. However, Pb accumulation in shoots of R. communis inoculated with B. cereus, B. subtilis and P.aeruginosa increased by 40%, 18% and 19%（P〈0.05）respectively compared with non-inoculated plants. It was suggested that the Pb-tolerant bacteria improved Pb uptake by R. communis and the inoculation of tolerant bacteria could potentially enhance R. communis the remediation efficiency of Pb contaminated soil.

关 键 词：铅 蓖麻 抗性菌株 植物修复 

分 类 号：X172[环境科学与工程—环境科学]