5种景天属植物耐受重金属锌胁迫差异性研究  

Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants

作　　者：王莹 徐宏波 王洋[1] 王梦茜[1] 汪成忠[1] 尹原森 孙雪[1] 周辉 卓丽环 WANG Ying;XU Hong-Bo;WANG Yang;WANG Meng-Qian;WANG Cheng-Zhong;YIN Yuan-Sen;SUN Xue;ZHOU Hui;ZHUO Li-Huan(Suzhou Polytechnic Institute of Agriculture,Suzhou 215000;Shanghai Donghai Vocational and Technical College,Shanghai 200000)

机构地区：[1]苏州农业职业技术学院,苏州215000 [2]上海东海职业技术学院,上海200000

出　　处：《植物研究》2021年第6期982-992,共11页Bulletin of Botanical Research

基　　金：中央高校基本科研业务费专项基金(2017-KYYWF-0138);江苏省大学生创新训练一般项目(202012808002Y);苏州农业职业技术学院博士提升计划项目专项基金(BS2001);江苏省江苏现代农业产业技术体系建设专项资金(JATS[2019]362,JATS[2019]365);苏州农业职业技术学院青年提升项目(QN2002)。

摘　　要：我国锌矿周围农田污染较为严重,筛选对锌抗性强的植物材料是修复锌污染农田的理想方法。采用盆栽实验,以对锌抗性强的长药景天、三七景天、德国景天、松塔景天、胭脂红景天作为研究对象,研究不同浓度外源锌(0、80、160、320、800、1600、2000 mg·kg^(-1))对5种景天属植物生长(生物量、株高)的影响,比较分析5种景天属植物耐受重金属锌胁迫能力差异。结果表明:5种景天的生物量、株高均随着重金属浓度增加,呈现先上升后下降的趋势,5种景天属植物生长受到抑制,其中三七景天、松塔景天遭受锌毒害较为严重;5种景天生长增幅最大值出现在不同锌浓度下,增幅变为负值也出现在不同锌浓度下;5种景天生长与锌胁迫线性分析中R2值均较好,回归方程系数能够说明5种景天生物量、株高促进和抑制速率,就生物量而言,胭脂红促生速率最大,德国景天抑制速率最大,就株高而言,长药景天的促生速率和抑制速率都为最大。For the pollution of farmland around zinc mines was seriours in China,so an ideal method to screen plant materials with strong resistance to zinc was needed.5 Sedum plants including Sedum spectabile,S.aizoon,S.hybridum,S.lydium and S.spurium‘Coccineum were used as materials and potted planting,the different concentrations of exogenous zinc(0,80,160,320,800,1600,2000 mg·kg^(-1))added on the plants growth(biomass and plants height)and the tolerance of to heavy metal zinc stress of plants was compared and analyzed respectively.The results showed that:The biomass and height of 5 Sedum plants increased first and then decreased with the concentration of heavy metal zinc increased and the growth of plants was inhibited,of which Sedum aizoon and Sedum lydium suffered more severe from zinc toxicity;The maximum growth of 5 Sedum plants appeared in different zinc concentrations,and the increase rate becoming negative appeared in different zinc concentrations either;The R2 values in linear analysis of growth and zinc stress of 5 Sedum plants were better,coefficient of regression equation could explain the promotion and inhibition rate of biomass and plant height of 5 Sedum plants,in terms of biomass,the growth promotion rate of S.spurium‘Coccineum’was largest,inhibition rate of S.hybridum was largest,and in terms of plant height,the growth promotion and inhibition rate of S.spectabile was largest.

关 键 词：锌胁迫 景天属 生物量 株高 差异 

分 类 号：Q945.79[生物学—植物学]