铅锌尾矿重金属胁迫下秸秆对蓖麻生理特性和重金属积累的影响  

Effects of straw addition on physiological parameters and uptake of heavy metals in Ricinus communis under the stress of Pb/Zn mine tailing

作　　者：朱佳文[1,2,3] 邹冬生[1] 向言词 王晖[1] 谭伟文[1] 

机构地区：[1]湖南农业大学生物科学技术学院,湖南长沙410128 [2]湖南科技大学资源环境与城乡规划管理系,湖南湘潭411201 [3]煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201

出　　处：《湖南农业大学学报（自然科学版）》2012年第3期325-329,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科学技术厅项目(2010NK3020);湖南省教育厅重点项目(10A031);湖南省自然科学市州联合基金项目(11JJ9007)

摘　　要：采用盆栽试验,研究在铅锌尾矿重金属胁迫下,秸秆对蓖麻幼苗生物量、叶片内丙二醛(MDA)含量和超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性以及重金属积累的影响。结果表明:在铅锌尾矿砂中添加秸秆能显著增加蓖麻的株高、根长和生物量;使蓖麻叶片中MDA含量和SOD、CAT、POD活性分别比对照降低了48.08%、7.28%、28.60%和4.74%;铅锌尾矿砂中有效态Pb、Zn、Cd含量显著降低,且蓖麻对Pb、Zn、Cd的积累量也显著下降;蓖麻叶片POD、SOD活性与叶片中Pb、Zn、Cd含量呈极显著正相关,蓖麻积累的重金属含量与尾矿砂中有效态重金属含量呈显著或极显著正相关。Pot experiments were carried out to investigate the effect of straw addition on biomass, contents of malonyldialdehyde （MDA）, activities of superoxide dismntase （SOD）, catalase （CAT）, peroxide enzyme （POD） and the accumulation of heavy metals （Pb, Zn, Cd） in Ricinus communis under the stress of Pb/Zn mine tailing. The results indicated that straw addition significantly increased fresh weight, height and root length of Ricinus communis. The contents of MDA and the activities of SOD, POD, CAT in the leaves of Ricinus communis under the straw treatments were 48.08%, 7.28%, 28.60% and 4.74% lower than the control, respectively. DTPA-extractable contents of Pb, Zn and Cd in the Pb/Zn mine tailing decreased significantly. The contents of Pb, Zn and Cd in plant organs of Ricinus communis decreased significantly with straw addition. An extremely significant positive correlation were observed between the activities of POD, SOD and the contents of Pb, Zn and Cd in the leaves of Ricinus communis, and significant or extremely significant positive correlation were observed between the contents ofPb, Zn and Cd in plant organs of Ricinus communis and DTPA-extractable contents ofPb, Zn and Cd in Pb/Zn mine tailing.

关 键 词：秸秆 蓖麻 生理特性 铅锌尾矿砂 重金属胁迫 

分 类 号：X53[环境科学与工程—环境工程] Q89[生物学]