汞胁迫对蜈蚣草生理特性的影响  

Effect of Hg^(2+) Stress on Physiological Characteristics of Pteris vittata L.

作　　者：徐小蓉[1] 张习敏[1] 杨立昌[1] 乙引[1] 

机构地区：[1]贵州师范大学生命科学学院,贵州贵阳550001

出　　处：《安徽农业科学》2011年第24期14772-14774,共3页Journal of Anhui Agricultural Sciences

基　　金：贵州省科学技术基金项目(黔科合J字[2009]2079);贵州省科技创新人才团队建设项目(黔科合人才团队[2009]4007号);贵州省社发攻关项目(黔科合SY[2011]3094号)

摘　　要：[目的]探讨蜈蚣草对汞的耐性及耐汞机理,为进一步研究汞砷复合污染的治理奠定理论依据。[方法]对汞胁迫条件下,蜈蚣草生长过程中生物量、叶绿素、丙二醛、游离脯氨酸含量及POD活性等进行了研究。[结果]汞浓度增加抑制蜈蚣草生长,降低叶绿素含量,大幅度提高丙二醛(MDA)和游离脯氨酸含量,但POD和SOD活性均呈先上升后下降的趋势。[结论]蜈蚣草对汞有一定的耐性,但随汞浓度的增加,蜈蚣草生长受到一定程度的影响,直至产生毒害。[Objective] The aim was to explore tolerance of Pteris vittata L to Hg2＋ and mechanism,provide theoretical basis for treatment of Hg and As compound pollution.[Method] Effects of heavy metal Hg2＋ on physiological characteristics of P.vittata L.were examined in a solution-culture experiment,incluing biomass,chlorophyll,MDA,free proline and POD activity.[Result] The results showed that P.vittata growth decreased with the increasing Hg2＋.The chlorophyll content dropped dramatically and the MDA content and free proline increased significantly as Hg2＋ concentrations reduced.The POD activity increased first,then decreased at the higher Hg2＋ concentrations,SOD increased firstly and decreased after.[Conclusion] P.vittata L had a certain tolerance to Hg2＋,but the growth of P.vittata L was affected in a certain until poisoned with the increasing Hg2＋.

关 键 词：蜈蚣草 汞胁迫 生理特性 

分 类 号：X74[环境科学与工程—环境工程]