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外源微生物强化蓖麻对铅的吸收与积累研究

Keywords: ,蓖麻,抗性菌株,植物修复

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Abstract:

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(Bacilluscereus)、枯草芽孢杆菌(Bacillussubtilis)和铜绿假单胞菌(Pseudomonasaeruginosa)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。

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