不同Zn、Cu水平对香根草(Vetiveria zizanioides)体内Cd积累及生理指标的影响  

Influence of Different Zinc and Copper Levels on Cadmium Accumulation and Physiological Characterization in Vetiveria zizanioides L.

作　　者：努扎艾提.艾比布 张艳慧[1,2] 阿斯娅.克里木 阿布都热西提.阿布力克木 

机构地区：[1]新疆师范大学化学化工学院,乌鲁木齐830054 [2]新疆师范大学环境污染检测与控制重点实验室,乌鲁木齐830054

出　　处：《内蒙古大学学报（自然科学版）》2012年第5期543-550,共8页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21062021);新疆师范大学优秀青年教师科研启动基金项目(XJNU1016);自治区教育科学规划重点课题(070308)

摘　　要：采用水培试验研究了不同浓度的重金属Cd(15、30mg·L-1)污染下,不同浓度Zn、Cu(10、40mg·L-1)对香根草生长、丙二醛(MDA)含量、根系活力、可溶性蛋白质、叶绿素含量以及香根草体内Cd积累的影响.结果表明,除了低浓度的Cu外,不同浓度的Zn、Cu、Cd对香根草体内生理生化指标都产生协同或加和作用,提高了香根草体内MDA含量,降低了根系活力、叶绿素a、b含量以及可溶性蛋白质含量.Zn、Cu对植物吸收Cd的复合作用较为复杂,其中对香根草地上部Cd的转移可能产生拮抗作用,对根部Cd的吸收可能产生协同或加和作用.Hydroponic experiments were carried out to investigate the influence of different zinc(Zn) and copper(Cu) levels(10,40 mg.L-1)on the growth,malondialdehyde(MDA)content,root activity,soluble protein,contents of chlorophyll a and b,and accumulation of cadmium(Cd) in Vetiveria zizanioides L.when they exposed to different Cd(15,30 mg.L-1)levels.The results showed that except the low level Cu treament,the combination of Zn-Cd and Cu-Cd exhibited synergistic decreasing effects on root activity,chlorophyll,protein contents,whereas made the MDA increase in experiments.The effects of Zn and Cu on the plant assimilating Cd were complex.The combination of Zn-Cd or Cu-Cd on Cd accumulation in shoots may have antagonism effects,and on the absorbing of Cd in roots it may have synergistic or addition effects.

关 键 词：复合污染 香根草 Cd积累特性 生理指标 

分 类 号：X171.5[环境科学与工程—环境科学]