吉林大学学报(理学版) ›› 2019, Vol. 57 ›› Issue (1): 182-189.

• 环境科学 • 上一篇    

紫花苜蓿幼苗对冻融及乙酸钙镁融雪剂胁迫的生理响应

孙佳星1, 包国章1, 何访淋1, 王方彪1, 李子勇2, 成文革2, 范存薪3, 巩泽1
  

  1. 1. 吉林大学 新能源与环境学院, 长春 130012; 2. 吉林省生物研究所, 长春 130012;3. 靖宇水源保护区管理局, 吉林 白山 135200
  • 收稿日期:2018-02-03 出版日期:2019-01-26 发布日期:2019-02-08
  • 通讯作者: 包国章 E-mail:baogz@jlu.edu.cn

Physiological Response of Alfalfa Seedlings to FreezeThawand Calcium Magnesium Acetate Snowmelt Agent Stress#br#

SUN Jiaxing1, BAO Guozhang1, HE Fanglin1, WANG Fangbiao1,LI Ziyong2, CHENG Wenge2, FAN Cunxin3, GONG Ze1#br#   

  1. 1. College of New Energy Environment and Resources, Jilin University, Changchun 130012, China;2. Institute of Biological Research of Jilin Province, Changchun 130012, China;3. The Administration of Jingyu Water Conservation, Baishan 135200, Jilin Province, China
  • Received:2018-02-03 Online:2019-01-26 Published:2019-02-08
  • Contact: BAO Guozhang E-mail:baogz@jlu.edu.cn

摘要: 研究紫花苜蓿东苜1号幼苗在乙酸钙镁盐(CMA)胁迫、 人工模拟冻融胁迫(10,5,0,-3,0,5,10 ℃)及冻融与CMA复合胁迫下的叶片相对含水量(RWC)、 净光合速率(A)、 蒸腾速率(E)和水分利用率(WUE)的变化. 结果表明: CMA组均低于对照组(CK)的RWC,A,E和WUE值; 冻融组与复合胁迫组的RWC,A和E值均呈先降低后升高的趋势; 冻融组的WUE值呈先降低后升高再降低的趋势, 且在T2(5 ℃)时达到最小值, 在T5(0 ℃)时达到最大值; 复合胁迫组的WUE值在T5时达到最大值; 苜蓿幼苗的RWC,A和E值呈CMA组<冻融组<复合胁迫组的变化趋势, 即复合胁迫对幼苗的影响更大, 在复合胁迫下, 苜蓿通过关闭气孔降低体内水分消耗, RWC,A,E值大幅度降低以提高苜蓿的抗逆性

关键词: 紫花苜蓿, 冻融, 乙酸钙镁盐, 相对含水量, 净光合速率, 蒸腾速率, 水分利用率

Abstract: The changes of relative water content (RWC), net photosynthetic rate (A), transpiration rate (E) and water use efficiency (WUE) in leaves under calcium magnesium acetate (CMA) stress, artificial simulated freezethaw stress (10,5,0,-3,0,5,10 ℃) and combined stress of freezethaw and CMA were studied with alfalfa Dongmu1. The results show that: RWC,A,E and WUE values in CMA group are lower than those  in control group (CK); RWC, A, and E values in freezethaw group and combined stress group decrease first and then increase; WUE value in freezethaw group decreases first, then increases and then decreases, and reaches the minimum at T2 (5 ℃) and the maximum  at T5 (0 ℃); WUE value in combined stress group reaches the maximum at T5; RWC, A and E values of alfalfa seedlings show the change that CMA group

Key words: alfalfa, freezethaw, calcium magnesium acetate (CMA),  , relative water content, net photosynthetic rate, transpiration rate, water use efficiency

中图分类号: 

  • X22