中国草地学报2025，Vol.47Issue(10)：34-43,10.DOI:10.16742/j.zgcdxb.20250103
外源2,4-表油菜素内酯对盐碱胁迫下藜麦种子萌发及幼苗生长的影响
Effects of Exogenous 2,4-Epibrassinolide on Seed Germination and Seedling Growth of Quinoa under Saline-Alkali Stress
摘要
Abstract
This study investigated the efficacy of exogenous 2,4-epibrassinolide(2,4-EBR)in mitigating saline-alkali stress during seed germination and seedling growth of quinoa(Chenopodium quinoa Willd.'Longli 1').Seeds were treated with various concentrations(0,0.05,0.1,0.2,0.4,0.8,1.5 and 2 mg/L)of 2,4-EBR and exposed to a range of simulated saline-alkali stress conditions.Principal component analysis and membership function method were used to comprehensively evaluate the physiological and biochemical indicators of quinoa under different saline-alkali stresses and different 2,4-EBR treatments.The results demonstrated that both single salt stress and mixed saline-alkali stress significantly inhibited the germination of quinoa seeds and the growth of seedlings.Exogenous application of 2,4-epibrassinolide(2,4-EBR)at concentrations of 0.05-2 mg/L effectively enhanced quinoa's osmotic adjustment capacity,alleviated oxidative damage induced by saline-alkali stress,and thereby improved its saline-alkali tolerance.Additionally,comprehensive evalua-tion analysis indicated that 0.2 mg/L 2,4-EBR exhibited the optimal alleviating effect on mixed saline-alkali stress;0.4 mg/L 2,4-EBR proved the most effective for single salt stresses(NaCl and NaHCO3);and 0.8 mg/L 2,4-EBR was optimal for single salt stresses induced by Na2SO4 and Na2CO3.关键词
藜麦/2,4-表油菜素内酯/盐碱胁迫/种子萌发/幼苗生长Key words
Chenopodium quinoa/2,4-epibrassinolide/Saline-alkali stress/Seed germination/Seed-ling growth分类
农业科技引用本文复制引用
桂金凤,赵颖,刘文瑜,王宝强,王雪玮,陈立飞,魏小红..外源2,4-表油菜素内酯对盐碱胁迫下藜麦种子萌发及幼苗生长的影响[J].中国草地学报,2025,47(10):34-43,10.基金项目
国家自然科学基金青年科学基金(32301775) （32301775）
甘肃农业大学省部共建干旱生境作物学国家重点实验室开放基金(GSCS-2021-10) （GSCS-2021-10）
甘肃省自然科学基金(23JRRA1426) （23JRRA1426）
