硒对铅、砷单一污染下小白菜种子萌发和幼苗生长的影响  

Effect of Selenium on Seed Germination and Seedling Growth Under Single Pollution of Pb and As in Chinese Cabbage

作　　者：赵秀峰[1] 程滨[1] 霍晓兰[1] 滑小赞[1] 赵瑞芬[1] 

机构地区：[1]山西省农业科学院农业环境与资源研究所,太原030031

出　　处：《中国农学通报》2017年第23期51-58,共8页Chinese Agricultural Science Bulletin

基　　金：山西省自然科学基金项目"硒对蔬菜砷胁迫缓解机理研究"(2015011079);山西省农业科学院博士研究基金项目"硒对蔬菜铅污染缓解机理研究"(YBSJJ1502)

摘　　要：为了探讨硒(Se)对小白菜铅(Pb)、砷(As)单一污染下造成毒害的缓解作用,采用种子萌发试验,研究了不同浓度外源Se(12.5、25、50、75、100 mg/kg)对不同浓度Pb(600、800、1000 mg/kg)和不同浓度As(80、100 mg/kg)单一污染下小白菜种子萌发和幼苗生长的影响。结果表明:在该研究缓解条件下,不同浓度Se显著提高Pb、As胁迫下小白菜种子发芽率、发芽势、根长、芽长和鲜重。表明外源Se能有效的减轻Pb、As胁迫对小白菜种子的毒害作用。对本研究所用的3种浓度Pb来说,适宜的Se缓解浓度分别为12.5、25、50 mg/kg。对两种浓度As来说,适宜的Se缓解浓度分别为25、100 mg/kg。To study the alleviated effect of Se on single pollution of Pb and As in Chinese cabbage, seedgermination experiments were performed to investigate the effect of exogenous Se（12.5、25、50、75、100 mg/kg）on single pollution of Pb（600、800、1000 mg/kg） and As（80、100 mg/kg） in seed germination and seedlinggrowth of Chinese cabbage. The results showed that different concentrations of Se dramatically increased thegermination rate, germination potential, root length, shoot length and the fresh weight under Pb and As stress,which indicated that exogenous Se application could effectively alleviate Pb and As toxicity to Chinesecabbage. For the single pollution of Pb of the three concentrations, the appropriate Se concentrations were12.5, 25 and 50 mg/kg. For the single pollution of As of the two concentrations, the appropriate Seconcentrations were 25 and 100 mg/kg.

关 键 词：铅污染 砷污染 硒 种子发芽 幼苗生长 

分 类 号：S634.3[农业科学—蔬菜学]