钙对热激诱导黄瓜幼苗抗冷性的影响  

Effect of Calcium on Heat-shock Induced Chilling Resistance in Cucumber Seedlings

作　　者：陈登科[1] 马成仓[1] 豆胜[1] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2007年第3期37-39,47,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家重点基础研究发展规划项目(G2000018601);天津师范大学引进人才科研启动基金项目

摘　　要：用CaCl2和钙的螯合剂ZGTA浸种,研究了热激诱导黄瓜幼苗抗冷性过程中的钙效应.结果表明:热激处理能够提高冷胁迫条件下黄瓜幼苗的主要抗氧化酶SOD,POD和CAT活性,降低膜脂过氧化产物丙二醛的含量和质膜透性,因而增强了黄瓜幼苗的抗冷性;钙处理可增强热激诱导这一效应,但由钙的螯合剂EGTA处理的效果则相反,这说明钙参与了热激诱导黄瓜幼苗抗冷性的调控.The cucumber seeds were soaked with CaClz solution and EGTA （Ca^2＋ chelator）, the effect of calcium on heat-shock induced chilling resistance in cucumber seedlings was studied. The results showed that heat-shock pretreatment could enhance the activity of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT）, and reduce the content of malon-diadehyde （product of membrane lipid peroxidation） and cytomembrane permeability in cucumber seedlings during chilling stress. Therefore heat-shock pretreatment could improve the chilling resistance of cucumber seedlings. Ca^2＋ treatment could increase the heat-shock-induced effect, but the EGTA （Ca^2＋ chelator） treatment had opposite effect. From the facts above, it is obvious that Ca^2＋ is involved in the heat-shock-induced chilling resistance of the cucumber seedlings.

关 键 词：黄瓜幼苗 热激 抗冷性 钙 

分 类 号：Q945.1[生物学—植物学]