增强UV-B辐射对胡椒薄荷逆境生理指标的影响  

Effect of Enhanced UV-B Radiation on Stress Physiology of Mentha piperita L.

作　　者：吴能表[1] 马红群[1] 

机构地区：[1]西南大学生命科学学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2012年第10期7-11,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30500041);重庆市科技攻关项目(cstc2012gg-yyjs80013)

摘　　要：对增强UV-B辐射胁迫下(辐射强度分别为自然光对照0、0.15 W/m2、0.35 W/m2)下生长的胡椒薄荷(Mentha piperita L.)逆境生理指标的动态变化进行了研究.结果表明:薄荷对增强UV-B辐射胁迫做出了适应性生理反应.0.15 W/m2下薄荷叶片内脯氨酸、可溶性糖、MDA质量浓度及3种抗氧化酶活性升高,蛋白质质量浓度下降;0.35 W/m2下薄荷叶片内脯氨酸质量浓度和CAT活性先升高后降低,可溶性糖质量浓度和SOD活性先升高再趋于平稳,可溶性蛋白质、MDA质量浓度和POD活性先降低后升高.尽管不同强度UV-B辐射下各个指标变化趋势不同,但与自然光对照相比,经过UV-B辐射处理后,薄荷内可溶性蛋白质质量浓度降低,而其它指标均升高.The stress physiology of Mentha piperita L.under enhanced UV-B radiation（natural light conrol 0、light UV-B radiation stress 0.15 W/m^2 and heavy UV-B radiation stress 0.35 W/m^2） was studied.The result indicated that Mentha piperita L.made adaptation physiological reaction under enhanced UV-B radiation.The content of proline,soluble sugar and three antioxidases increased while the content of soluble protein decresed under 0.15 W/m^2 UV-B radiation.The content of proline and CAT activity rose firstly,then went down later;the content of soluble sugar and SOD activity rose firstly then stabilized;while the content of soluble protein,MDA and POD activity went down firstly then rose.Though the variation of all the indexs was different under enhanced UV-B radiation,all the indexs except the content of soluble protein were increased compareing to themselves under natual light control.

关 键 词：胡椒薄荷 UV-B辐射胁迫 逆境生理指标 

分 类 号：Q947[生物学—植物学]