Toxicological effects of rare earth yttrium on wheat seedlings(Triticum aestivum)  

作　　者：冯秀娟 朱国才 李亚宁 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University [2]School of Resources and Environmental Engineering,Jiangxi University of Science and Technology [3]Laboratory of Environmental Science and Engineering,Nankai University Binhai College

出　　处：《Journal of Rare Earths》2013年第12期1214-1220,共7页稀土学报（英文版）

基　　金：supported by National Natural Science Foundation of China(21067003,51364015);the Natural Science Foundation of Jiangxi Province(20114BAB203024);the National High-Tech Research and Development Program of China(2012BAC11B07)

摘　　要：This study examined the biochemical responses of wheat（Triticum aestivum） to the stress of rare earth yttrium（Y） and showed that 25–100 mg/kg Y treatments evidently increased the biomass（root mass,shoot mass and leaf mass）,accompanied by a significant（p0.05） increase in the chlorophyll（CHL） content in wheat leaves.Increased malondialdehyde（MDA） levels were detected in wheat shoots（stem and leaf） and roots too,indicating the presence of poisoning active oxygen species（AOS）.The MDA content in wheat roots increased with the augmentation of Y concentration.These results indicated that there was a dose-dependent effect of Y on the changes of MDA content in wheat roots.Although the activities of superoxide dismutases（SOD）,peroxidases（POD） and catalases（CAT） in wheat shoots and roots irregularly fluctuated with the increase in Y concentration,25–100 mg/kg Y significantly（p0.01） increased the activities of SOD and POD.In general,the dose-dependent effects of Y on the activity of antioxidant enzymes were insignificant.Our data also indicated that the increase in SOD and POD activities could be used as a good biomarker for the stress induced by low concentrations of Y.This study examined the biochemical responses of wheat（Triticum aestivum） to the stress of rare earth yttrium（Y） and showed that 25–100 mg/kg Y treatments evidently increased the biomass（root mass,shoot mass and leaf mass）,accompanied by a significant（p0.05） increase in the chlorophyll（CHL） content in wheat leaves.Increased malondialdehyde（MDA） levels were detected in wheat shoots（stem and leaf） and roots too,indicating the presence of poisoning active oxygen species（AOS）.The MDA content in wheat roots increased with the augmentation of Y concentration.These results indicated that there was a dose-dependent effect of Y on the changes of MDA content in wheat roots.Although the activities of superoxide dismutases（SOD）,peroxidases（POD） and catalases（CAT） in wheat shoots and roots irregularly fluctuated with the increase in Y concentration,25–100 mg/kg Y significantly（p0.01） increased the activities of SOD and POD.In general,the dose-dependent effects of Y on the activity of antioxidant enzymes were insignificant.Our data also indicated that the increase in SOD and POD activities could be used as a good biomarker for the stress induced by low concentrations of Y.

关 键 词：rare earth elements（REEs） toxicological effects oxidative stress wheat（Triticum aestivum） 

分 类 号：X173[环境科学与工程—环境科学] S512.1[农业科学—作物学]