脱落酸、水杨酸和氯化钙对番茄幼苗抗冷性的影响  

Effect of ABA,SA and CaCl_2 on cold tolerance of tomato seedlings

作　　者：于锡宏[1] 蒋欣梅[1] 刁艳[1] 王丽丽[1] 刘在民[1] 于广建[1] 

机构地区：[1]东北农业大学园艺学院,哈尔滨150030

出　　处：《东北农业大学学报》2010年第5期42-46,共5页Journal of Northeast Agricultural University

基　　金：黑龙江省教育厅项目(11531019);哈尔滨市科技创新人才研究专项基金项目(2007LXN004);东北农业大学创新团队课题(CXT002-2)

摘　　要：选用不同浓度脱落酸(ABA)、氯化钙(CaCl)2、水杨酸(SA)对3叶期的番茄幼苗进行叶面喷施处理,研究低温胁迫下(昼温/夜温=(10±0.5)℃(/5±0.5)℃)三种外源化学物质对番茄冷害指数及与抗冷性相关的生理指标的影响。结果表明,用10和15mg·L-1ABA、1400和1800mg·L-1CaCl2、300和400mg·L-1SA喷施番茄幼苗后,番茄叶片相对电导率和丙二醛含量降低,叶绿素和脯氨酸含量升高,冷害指数降低,对冷害具有缓解作用。所有处理中以1400mg·L-1氯化钙处理的效果最好。In this study,the effects of different concentrations of exogenous ABA（10,15 mg·L-1）,SA（300,400 mg·L-1）,and CaCl2（1 400,1 800 mg·L-1） on cold damage index and physiological index of tomato seedlings were studied under the regime of day temperature（10 ±0.5 ℃）/night temperature（5 ±0.5 ℃） by spraying on leaves.The results showed that three exogenous substance treatments decreased cold damage index,increased the cold tolerance of tomato seedlings,the relative conductance rate and the MDA contents were decreased remarkably,and chlorophyll and Pro contents were increased remarkably.The treatment of 1 400 mg·L-1 CaCl2 had the best effect on increasing the cold tolerance of tomato seedlings.

关 键 词：番茄 抗冷性 脱落酸 水杨酸 氯化钙 

分 类 号：S641.2[农业科学—蔬菜学] Q945.78[农业科学—园艺学]