摘要
为探明植物激素提高作物重金属耐性的可行性,利用盆栽试验研究施用不同浓度多效唑(0mg/L、300mg/L和600mg/L)对玉米幼苗株高、生物量、叶绿素含量及铅(Pb)、锌(Zn)、镉(Cd)、铜(Cu)和砷(As)累积的影响。结果表明:施用多效唑可提高玉米幼苗叶绿素的含量,降低株高,增加地上部和地下部的生物量。600mg/L多效唑处理导致玉米幼苗地上部Pb、Zn和Cd的含量,地下部Cd和Cu的含量显著下降;由于玉米地上部生物量的增幅大于重金属含量的降幅,进而多效唑使玉米幼苗地上部Pb和Cu累积量、地下部As累积量显著增加。可见,重金属污染条件下,施用多效唑有利于玉米幼苗的生长,降低玉米幼苗体内重金属的含量,提高其对重金属的耐性。
In order to investigate the possibility of heavy metal tolerance of crops by using hormones, the effects of different concentrations （0 mg/L,300 mg/L and 600 mg/L）of paclobutrazol on the height, biomass,chlorophyll contents and Pb,Zn,Cd,Cu and As accumulation by maize were studied that grew in pots of soil from an abandoned farmland surrounding a Pb and Zn mine area.The results showed that：the chlorophyll contents were improved,the height was decreased and the aboveground and belowground biomass of maize seedlings was increased by paclobutrazol;With 600 mg/L paclobutrazol treatment,the content of Pb,Zn and Cd in the aboveground seedling,Cd and Cu in the belowground seedling was decreased significantly;The accumulation of Pb and Cu by aboveground seedling,As by belowground seedling was increased significantly. These results indicated that the growth of maize seedlings was improved,the content of heavy metals was decreased,and the heavy metal tolerance was enhanced by paclobutrazol under the conditions of heavy metal pollution.
出处
《贵州农业科学》
CAS
北大核心
2014年第1期29-32,共4页
Guizhou Agricultural Sciences
基金
国家自然科学基金项目"DSE-植物联合体硫素营养代谢特征及其促进镉累积的机理"(41101486)
关键词
多效唑
玉米
生物量
铅
锌
镉
铜
砷
paclobutrazol
maize
biomass
Pb
Zn
Cd
Cu
As
作者简介
朱林波（1988-），男，在读本科。Email：1196208434@qq．com
通讯作者：何永美（1980-），女，讲师，博士，从事环境生态学科研工作。E-mail：heyongmei06@126．com
