紫花苜蓿幼苗对冻融及乙酸钙镁融雪剂胁迫的生理响应

Abstract

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

CLC Number:

SUN Jiaxing, BAO Guozhang, HE Fanglin, WANG Fangbiao, LI Ziyong, CHENG Wenge, FAN Cunxin, GONG Ze. Physiological Response of Alfalfa Seedlings to FreezeThawand Calcium Magnesium Acetate Snowmelt Agent Stress#br#[J].Journal of Jilin University Science Edition, 2019, 57(1): 182-189.

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

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