饲料研究2025，Vol.48Issue(6)：115-121,7.DOI:10.13557/j.cnki.issn1002-2813.2025.06.021
盐胁迫对10份无芒雀麦幼苗生长和生理的影响及耐盐评价
Effects of salt stress on growth and physiological responses of 10 Bromus inermis seedlings and salt tolerance evaluation
摘要
Abstract
The study aimed to investigate the effects of salt stress on growth and physiological characteristics of 10 Bromus inermis accessions(D1～D10)and evaluate their salt tolerance.The NaCl concentration was increased by 50 mmol/L every 12 hours until reaching 200 mmol/L,while the control(CK)was irrigated with deionized water.Each treatment with three replicates,and the salt stress treatment lasted for 14 days.Correlation analysis,principal component analysis(PCA),and membership function analysis were performed on 19 indicators to screen salt-tolerant materials.The results showed that under salt stress,plant height,stem diameter,root length,aboveground biomass and underground biomass of all 10 accessions were lower than CK.Except for slightly lower soluble sugar(SS)content in D3 leaves compared to CK,the contents of malondialdehyde(MDA),proline(Pro),SS,soluble protein(SP)and activities of CAT,POD and SOD in leaves and roots were higher than CK.In PCA of salt tolerance coefficients for seedling physiological indicators,the first principal component showed the highest eigenvalue(9.59),accounting for 50.472％of total variance,with Pro and antioxidant enzymes exhibiting high eigenvector values and positive correlations.Using membership function analysis,weight coefficients and comprehensive evaluation D values,the 10 accessions were ranked as:D10＞D9＞D3＞D8＞D7＞D6＞D2＞D5＞D1＞D4.The accessions were classified into three groups:high salt-tolerant(D10,D9,D3),moderate salt-tolerant(D8,D7,D6,D2),and low salt-tolerant(D5,D1,D4).The study indicsates that D10,D9 and D3 are more suitable for cultivation in saline-alkali soils.关键词
无芒雀麦/盐胁迫/生长/生理特性/耐盐评价Key words
Bromus inermis/salt stress/growth/physiological characteristics/salt tolerance evaluation分类
农业科技引用本文复制引用
蒋昂辰,于爱萍,张晶,陈爱萍..盐胁迫对10份无芒雀麦幼苗生长和生理的影响及耐盐评价[J].饲料研究,2025,48(6):115-121,7.基金项目
国家现代农业产业技术体系(项目编号:CARS-34) （项目编号:CARS-34）
