文献类型：期刊文献

中文题名：Se对小麦的生态毒理效应及临界指标研究

英文题名：Eco- toxicological Effects of Selenium Stress on Wheat (Triticum aestium L.) and Its Critical Value

作者：林匡飞[1];徐小清[2];金霞[3];姜达炳[4];项雅玲[4]

机构：[1]华东理工大学危险化学物质风险评价与控制研究中心,上海200237;[2]中国科学院水生生物研究所,湖北武汉430072;[3]中国科学院武汉植物研究所,湖北武汉430072;[4]农业部环境质检中心(武汉),湖北武汉430070

年份：2004

卷号：23

期号：6

起止页码：1082

中文期刊名：农业环境科学学报

外文期刊名：Journal of Agro-Environment Science

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：硒污染;抗氧化酶系统;生态毒理效应;临界指标

外文关键词：selenium pollution; antioxidative enzymes; eco- toxicological effect; critical value

摘要：采用土壤添加Se的盆栽试验方法,研究了Se对小麦的生态毒理效应及监界指标。结果表明,低浓度Se(<8mg·kg-1)对小麦根和地上生物量、叶绿素a含量、叶绿素a/b有促进作用,并整体提高了作物抗氧化酶系统,使MDA下降,SOD、CAT、GSH-Px活性相应提高。而高浓度Se(>16mg·kg-1)对小麦根和地上生物量、叶绿素a含量、叶绿素a/b有明显的抑制作用,对抗氧化酶系统产生胁迫效应,使GSH-Px明显上升,MDA上升,SOD、CAT酶活性明显下降,对POD活性影响不明显。各项生理指标与土壤Se处理浓度之间相关分析表明,土壤Se浓度与地上部干重相对百分率、根干重百分率、叶绿素a/b、MDA、SOD、CAT之间有显著相关性。比较胁迫效应10%值的临界指标EC10值表明,作物地上部干重抑制率和根干重抑制率作为土壤临界值制定的依据更为可靠,根干重的EC10为30mg·kg-1。
The effects of selenium added to soil on the growth and scavenging system of activated oxygen of wheat (Triticum aestium L.) were studied through pot experiment. It was found that wheat biomass, the content of chlorophyll a, chlorophyll a/b and the activities of antioxidative enzymes (SOD, POD, CAT, GSH- Px) increased obviously, with MDA content decreasing, at low levels of Se (<8 mg· kg- 1) added to soils; while, at high levels (>16 mg· kg- 1) of Se added to soils, the biomass, the content of chlorophyll a and chlorophyll a/b were obviously inhibited, the activity of GSH- Px and MDA content increased, the activities of SOD and CAT decreased significantly, but the activity of POD showed no change. The concentration of Se in soil significantly was correlated to the physiological indexes (roots biomass, shoots biomass, chlorophyll a/b, content of MDA, the activities of SOD and CAT). According to the pot experiment, the inhibition rate of roots biomass or shoots biomass “ 10% ” could be regarded as the critical value, and the critical content of Se in soil was estimated to be 30 mg· kg- 1.