硒对小麦和水稻种子萌发的生态毒理效应的比较研究  

Comparison of ecotoxic effect of selenium on seed germination of wheat and paddy rice.

作　　者：邵志慧[1] 林匡飞[1] 徐小清[2] 郑利[2] 项雅玲[1] 

机构地区：[1]农业部环境质检中心,武汉430070 [2]中国科学院水生生物研究所,武汉430072

出　　处：《生态学杂志》2005年第12期1440-1443,共4页Chinese Journal of Ecology

基　　金：湖北省科技攻关计划引导资助项目(2001AA201C10)。

摘　　要：通过水培试验,比较研究了硒在不同浓度下对小麦和水稻种子萌发及幼苗生长的生态毒理效应。结果表明,硒在适量范围内(<0.5 mg.L-1)对种子萌发过程中各生理指标有促进作用,高剂量(>5 mg.L-1)时,对种子活力、α-淀粉酶及幼苗和根生长具有胁迫效应。硒对小麦种子发芽各指标抑制率大于水稻,硒对种子根伸长的抑制率远远大于发芽抑制率。对硒浓度与种子发芽各项指标抑制率相关分析,呈显著正相关。应用小麦根伸长抑制率可作为化学物质生态风险评价的一项生物标志物。Eeotoxic effects of selenium on the seed germination and seedling growth of wheat （ Triticum aestivum L. ） and rice （ Oryza sativa L. ） were studied by solution culture experiment. The results showed that low concentration of Se （under 0.5 mg·L^-1） could promote the seed germination of wheat and its seedling growth, while high concentration of Se （above 5 mg·L^-1） reduced the germination rate, the seedling growth and vigor and α-amylase activity markedly. The inhibition rates of seed germination indices of wheat were stronger than those of rice, among which the root elongation was the most sensitive. There was significantly positive correlation between the inhibition rate of seed germination and the concentration of Se in solution. The inhibition rate of root elongation of wheat seeds could be used as a biomarker to assess the ecological risk of selenium pollution.

关 键 词：硒污染 发芽率 抑制率 生态毒理效应 

分 类 号：X173[环境科学与工程—环境科学]