江苏农业学报2026，Vol.42Issue(1)：21-31,11.DOI:10.3969/j.issn.1000-4440.2026.01.003
外源精胺和亚精胺对盐胁迫下2种小麦幼苗生理特性的影响
Effects of exogenous spermine and spermidine on the physiological charac-teristics of two wheat seedlings under salt stress
摘要
Abstract
To investigate the effects of exogenous spermine(Spm)and spermidine(Spd)on the growth and salt toler-ance of wheat seedlings,this experiment used two wheat varieties with different salt tolerances(Bainong 201,with strong salt tolerance;Aikang 58,with weak salt tolerance)as materials.It explored the regulatory effects of seed soaking with three con-centrations(0.05 mmol/L,0.10 mmol/L,and 0.20 mmol/L)of Spm and Spd on the growth parameters(germination rate,root length and shoot length)and physiological indicators including chlorophyll(Chl.)content,malondialdehyde(MDA)content,proline(Pro)content and peroxidase(POD)activity of wheat seedlings under different degrees(25 mmol/L NaCl,50 mmol/L NaCl,and 100 mmol/L)of NaCl stress.The results showed that,compared with the control(cultivation in distilled water),NaCl stress signifi-cantly inhibited wheat seed germination and seedling growth.The germination rate,root length,shoot length,chlorophyll content of Bainong 201 and Aikang 58 decreased significantly as the salt stress concentration increased,while the MDA content,Pro content,and POD activity increased sig-nificantly.Seed soaking with appropriate concentrations of Spm and Spd alleviated the inhibitory effects of salt stress on seed germination rate,root length,shoot length,and chlorophyll content in both Bainong 201 and Aikang 58.This treatment resul-ted in a decrease in MDA content and a further increase in Pro content and POD activity.Based on a comprehensive analysis using the membership function method,the results indicated that Spd was more effective than Spm in alleviating the toxic effects of salt stress on seedlings.Furthermore,its positive effect was more pronounced in the salt-sensitive variety Aikang 58 than in the salt-tolerant variety Bainong 201.Among the treatments,seed soaking with 0.10 mmol/L Spd demonstrated the best efficacy in mitigating NaCl stress-induced damage to wheat seedlings.关键词
小麦/盐胁迫/外源精胺/外源亚精胺/生长指标/生理特性Key words
wheat/salt stress/exogenous spermine/exogenous spermidine/growth parameters/physiological characteristics分类
农业科技引用本文复制引用
杨晓菲,张宁,张树军..外源精胺和亚精胺对盐胁迫下2种小麦幼苗生理特性的影响[J].江苏农业学报,2026,42(1):21-31,11.基金项目
陕西省科技厅重点研发计划——农业农村领域项目(2025NC-YBXM-004) （2025NC-YBXM-004）
国家自然科学基金青年项目(31701416) （31701416）
陕西省科协青年人才托举计划项目(20200207) （20200207）
国家级大学生创新创业训练计划项目(202310723026) （202310723026）
