低温胁迫对不同番茄品种生长和生理生化指标的影响  

Influences of low temperature stress on different varieties of tomato growth and physiological and biochemical index

作　　者：陈胜萍[1] 刘晓光[1] 赵成萍[2] 陈志[1] Chen Shengping Liu Xiaoguang Zhao Chengping Chen Zhi(Tangshan Research Institute of Agricultural Science, Tangshan 063001, China College of Life Sciences, Shanxi Agricultural University, Taigu 030801 , China)

机构地区：[1]唐山市农业科学研究院,河北唐山063001 [2]山西农业大学生命科学学院,山西太谷030801

出　　处：《山西农业大学学报（自然科学版）》2017年第11期780-784,共5页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：唐山市农业科学研究院科技创新基金(201401)

摘　　要：[目的]以现有的品种唐粉108、唐红109、东农728、粉冠1号、中杂9号5个番茄品种为试材,研究其耐低温胁迫性,为番茄冬季栽培生产和耐寒品种选育提供依据。[方法]试验以25℃/15℃为对照,在15℃/5℃和20℃/10℃低温条件下处理,光照强度均为4 000lx,处理时间为15d,测定番茄幼苗生长指标和生理生化指标(根系活力、叶绿素含量、SOD活性、丙二醛含量、可溶性糖含量、POD活性,相对电导率和脯氨酸含量)变化。[结果]低温胁迫下,各番茄品种的生长指标及干物质均有所下降,生理生化指标变化则不同,其中根系活力、叶绿素含量、SOD活性呈下降趋势,而MDA含量、可溶性糖含量、POD活性、相对电导率和脯氨酸含量是随着温度的降低反而提高。[结论]低温胁迫促进了MDA、脯氨酸含量增加和POD活性,其变化与番茄不同品种抗寒性密切相关。5个番茄品种抗寒性大小顺序为:唐粉108、东农728、唐红109、中杂9号、粉冠1号。[Objective]Low temperature stress resistance of tomato varieties which were Tangfen 108,Tang—hong 109,Dongnong 728,Fenguan NO.1,zhongza NO.9 were studied to provide reference for cultivation and cold tolerance breeding of tomato in winter.[Methods]The experiments were carried out at 15℃/5℃and 20℃/10℃,and at 25℃/15 ℃ as check,the illumination intensity was 4 000 lx,the treatment time was 15 d.The changes of growth,physiological and biochemical indexes of tomato seedlings were measured including root activity,chlorophyt,SOD activity,MDA,soluble sugar,POD activity,relative conductivity,proline.[Results]The result showed that the growth index and dry matter of all tomato varieties decreased under low temperature stress.While the changes of physiological and biochemical indexes were different,root activity,chlorophyll,SOD activity decreased,while MDA,soluble sugart,POD activity,relative conductivity and the proline increased with the temperature decreased.[Conclusion]Low temperature stress promoted the increase of MDA,proline and POD activity,and the changes were closely related to cold resistance of different tomato varieties.The five tomato varieties cold resistance were listed in an order of Tangfen 108,Dongnon 728,Tanghong109,zhongza NO.9,fenguan NO.1.

关 键 词：番茄 低温胁迫 生长指标 生理生化指标 

分 类 号：S641.02[农业科学—蔬菜学] S627[农业科学—园艺学]