低温胁迫对竹柏生理生化特征的影响  

Effects of Cold Stress on Physiological and Biochemical Characteristics of Podocarpus nagi

作　　者：周存宇[1] 杨朝东[1] 占磊[1] 

机构地区：[1]长江大学园艺园林学院,湖北荆州434025

出　　处：《安徽农业科学》2011年第27期16666-16667,16670,共3页Journal of Anhui Agricultural Sciences

基　　金：长江大学博士启动基金(801190010105)

摘　　要：[目的]对引种的竹柏幼苗进行冬季低温胁迫研究。[方法]通过测定竹柏幼苗叶片质膜相对透性、游离脯氨酸含量、可溶性糖含量、丙二醛(MDA)含量和叶绿素含量等生理指标,研究竹柏幼苗在自然条件下(18～25℃)的和人控低温(5～6℃)条件下这些生理指标连续5 d的变化规律。[结果]竹柏幼苗叶片可溶性糖含量、游离脯氨酸含量、丙二醛含量和质膜相对透性均较对照有所上升;叶绿素含量随着低温胁迫时间的延长逐渐下降。[结论]竹柏幼苗对低温胁迫产生了积极的响应,受低温伤害有所降低。[Objective]The research aimed to study the introduction of Podocarpus nagi at cold stress.[Method]By measuring plasma membrane permeability,the content of free proline,soluble sugar content,malondialdehyde（MDA） and chlorophyll,researched the Podocarpus nagi seedlings under normal temperature conditions（18-25 ℃） and low temperature（5-6 ℃）.[Result]The plasma membrane permeability,the content of free proline,soluble sugar and MDA in the leaves of Podocarpus nagi seedling increased after low temparature treatment for 5 days,compared with control;the content of chlorophyll in the leaves of Podocarpus nagi seedlings under cold stress decreased,compared with control.[Conclusion] Podocarpus nagi seedlings showed positive response to cold stress and increased their cold tolerance.

关 键 词：竹柏 低温胁迫 生理指标 

分 类 号：S79[农业科学—林木遗传育种]