在水培方式下锶对白菜和油菜某些生理指标的影响  

Some physiological effects of strontium on hydroponic Chinese cabbage and rape

作　　者：李奕奉 闫冬[1] 何映雪 姜晓燕[1] 丁库克[1] 

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所,北京100088

出　　处：《癌变．畸变．突变》2016年第3期223-226,共4页Carcinogenesis,Teratogenesis & Mutagenesis

基　　金：科技部国家支撑计划课题(2013BAK03B05);核废物与环境安全国防重点学科实验室西南科技大学开放基金项目(14zxnk03);公共卫生专项(50010215-1301);国家自然科学基金项目(41402211)

摘　　要：目的:研究锶(Sr^(2+)对白菜与油菜某些生理指标的影响。方法:配制含有不同浓度Sr^(2+)(0、1、2、3和4 mmol/L)的霍格兰氏营养液培养白菜与油菜幼苗4周后,测定两种蔬菜叶片中丙二醛(MDA)、过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(TSOD)活性及叶绿素含量。结果:与对照组相比,随着Sr^(2+)浓度的升高,白菜叶片中MDA含量先升高后降低,当Sr^(2+)浓度为2 mmol/L时达到峰值(P<0.05);油菜叶片中MDA含量各组之间差异无统计学意义(F=2.798,P>0.05);两种蔬菜MDA含量差异无统计学意义(F=0.057,P>0.05)。两种蔬菜叶片中的CAT、POD、T-SOD活性均呈现先降低后升高,且在油菜中,POD和T-SOD活性在Sr^(2+)为1~4mmol/L时均明显低于对照组,差异均具有统计学意义(P均<0.05)。两种蔬菜在14、21和28 d时,叶片中叶绿素含量与7d时相比均明显增加,差异均具有统计学意义(P均<0.05)。结论:锶对油菜和白菜的MDA、过氧化物酶系统及叶绿素含量可产生显著影响。OBJECTIVE： To study some physiological effects of strontium on Chinese cabbage and rape. METHODS ： The Hoagland solutions of different strontium concentrations（0, 1, 2, 3, 4 mmol/L） were used to culture Chinese cabbage and rape. After 4 weeks, leaves were used to analyze chlorophyll content and activities of antioxidant enzymes, including malondialdehyde （MDA）, catalase （CAT）, peroxidase （POD） and total superoxide dismutase （T- SOD）. RESULTS ： Compared with controls, the content of MDA in treated Chinese cabbage decreased from the peak of 2 mmol/L of strontium （P〈0.05）, while there was no significant difference between groups in rape （F=2.798, P〉0.05）. Also, no significant difference was found between the two vegetables （F=0.057, P〈0.05）. The activity of CAT, POD and T-SOD decreased first and then increased significantly （P〈0.05）. Chlorophyll content for the 14 d, 21 d, 28 d increased significantly over that of 7 d （P〈0.05）. CONCLUSION： Strontium has strong influence on MDA, antioxidant enzyme and chlorlphyll of Chinese cabbage and rape.

关 键 词：锶 白菜 油菜 抗氧化物酶 叶绿素 

分 类 号：Q947.9[生物学—植物学]