硒对延龄草生长及硒、镉、砷、铅、汞吸收规律的影响  

Sodium Selenite Regulates Growth and Uptake of Se,As and Heavy Metals of Trillium tschonoskii

作　　者：江念[1,2] 杨强[2] 万佐玺[1] 陈根洪[1] 郑小江[1] 

机构地区：[1]湖北民族学院生物科学与技术学院,湖北恩施445000 [2]生物资源保护与利用湖北省重点实验室,湖北恩施445000

出　　处：《中药材》2016年第9期1960-1965,共6页Journal of Chinese Medicinal Materials

基　　金：湖北省自然科学基金创新群体项目(2009CDA115);生物资源保护与利用湖北省重点实验室开放基金项目(PKLHB1525;1526);恩施州技术研发项目(2013;2014)

摘　　要：目的：探讨在不同硒浓度条件下延龄草生长发育规律及硒、镉、砷、铅、汞吸收规律。方法：用不同浓度的外源硒与镉、砷、铅、汞处理延龄草,计算延龄草生长量、叶面积、生根数等指标来反应其生长规律;用原子荧光法测定硒与镉、砷、铅、汞的吸收量。结果：延龄草茎叶相对生长量、叶面积和生根数都随着外源硒浓度的增大呈先增大后减小的趋势,在外源硒浓度为25 mg/kg时,延龄草茎叶相对生长量、叶面积和生根数均达到最大值,当硒浓度超过30 mg/kg时,对延龄草的生长发育表现出抑制作用。延龄草对镉、铅、汞、砷的吸收随着外源硒浓度的增加出现先减少再增加后减少的规律,硒浓度为10-15 mg/kg时,延龄草对镉、铅、汞、砷的吸收量最少。结论：不同硒浓度对延龄草的生长发育及吸收镉、铅、汞、砷的作用有所不同。Objective： To study the influence of different concentrations of selenium on the growth and absorbing of Se,Cd,Pb,Hg and As in Trillium tschonoskii. Methods： Trillium tschonoskii was treated with different concentrations of exogenous selenium,arsenic and heavy metals,and then the mass growth,leaf area,root number and other indicators reflecting its growth rule were calculated. Atomic fluorescence method was used to measure the absorption contents of Se,Cd,Pb,Hg and As. Results： The relative mass growth,leaf area and root number of Trillium tschonoskii increased at first and then decreased with the increasing of exogenous selenium concentrations. When the concentration of selenium was 25 mg / kg,the relative mass growth,leaf area and root number of Trillium tschonoskii reached a maximum. When selenium concentrations was over than 30 mg / kg,it inhibited the growth and development of Trillium tschonoskii. Trillium tschonoskii absorbing Cd,Pb,Hg and As had a regular of first decreasing then increasing and last decreasing. It reached the lowest when selenium concentrations at the range of 10 - 15 mg / kg. Conclusion： Selenium had both stimulating effect and inhibiting effect on the growth and development of Trillium tschonoskii. Different selenium concentrations have different effects in absorbing Cd,Pb,Hg and As of Trillium tschonoskii.

关 键 词：延龄草 硒 镉 砷 铅 汞 生长规律 

分 类 号：R282.71[医药卫生—中药学]