Toxicological effects of rare earth yttrium on wheat seedlings(Triticum aestivum)
来源期刊：Journal of Rare Earths2013年第12期
论文作者：冯秀娟 朱国才 李亚宁
文章页码：1214 - 1220
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（p<0.05）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（p<0.01）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.
冯秀娟1,2，朱国才1，李亚宁3
1. Institute of Nuclear and New Energy Technology,Tsinghua University2. School of Resources and Environmental Engineering,Jiangxi University of Science and Technology3. Laboratory of Environmental Science and Engineering,Nankai University Binhai College
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（p<0.05）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（p<0.01）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.
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