河南农业科学2025，Vol.54Issue(9)：43-52,10.DOI:10.15933/j.cnki.1004-3268.2025.09.005
MgCl2胁迫对紫花苜蓿萌发期和苗期生长的影响及耐盐指标筛选
Effects of MgCl2 Stress on Alfalfa Growth and Screening of Salt Tolerance Indexes at Germination and Seedling Stages
摘要
Abstract
Different concentrations(0,40,80,120,160,200 mmol/L)of MgCl2 solution were set up to study the effects of MgCl2 stress on the seed germination,seedling growth and physiological indexes of alfalfa.The gray correlation analysis was used to screen the salt tolerance indexes,with the aim of providing a certain theoretical basis for the research on the response mechanism of alfalfa to MgCl2 stress and the governance of saline-alkali land.The results showed that with the increase of MgCl2 concentration and treatment time,the inhibition of alfalfa seed germination and seedling growth became more and more severe.When the MgCl2 concentration was 200 mmol/L,the seeds did not germinate and the salt damage index was 1.0.Among the germination indexes of alfalfa seeds,the fresh weight,germination rate and germination index were more closely related to salt tolerance,with correlation degrees of 0.948,0.927 and 0.927,respectively.Among the seedling growth and physiological indexes,the chlorophyll content,superoxide dismutase(SOD)activity and catalase(CAT)activity were more closely related to salt tolerance,with correlation degrees of 0.941,0.920 and 0.917,respectively.In conclusion,the main salt tolerance indexes of alfalfa are fresh weight,germination rate,germination index and chlorophyll content,SOD activity,CAT activity at germination and seedling stages,respectively.关键词
紫花苜蓿/MgCl2/种子萌发/幼苗生长/耐盐指标Key words
Alfalfa/MgCl2/Germination of seeds/Seedling growth/Salt tolerance indexes分类
农业科技引用本文复制引用
魏晓娜,张晨,祁乐萍,沈迎芳..MgCl2胁迫对紫花苜蓿萌发期和苗期生长的影响及耐盐指标筛选[J].河南农业科学,2025,54(9):43-52,10.基金项目
青海省自然科学基金项目(2025-ZJ-717) （2025-ZJ-717）
青海民族大学2023年度校级规划项目(23GH12) （23GH12）
青海省昆仑英才"中青年科技人才"托举项目(2023QHSKXRCTJ28) （2023QHSKXRCTJ28）
青海民族大学2024年研究生创新项目(54M2024003) （54M2024003）
