种子2026，Vol.45Issue(2)：11-18,25,9.DOI:10.16590/j.cnki.1001-4705.2026.02.011
外源物质对盐、旱胁迫下益母草种子萌发和幼苗生长的影响
Effects of Exogenous Substances on Seed Germination and Seedling Growth of Leonurus japonicus Under Salt and Drought Stress
摘要
Abstract
To screen out the optimal exogenous substances and their application concentrations that could promote the germination of Leonurus japonicus seeds and the growth of seedlings under salt and drought stress,different concentrations of exogenous substances,namely brassinolide and gibberel-lin,were used to soak the Leonurus japonicus seeds for 24 hours.The effects of these exogenous sub-stances on the physiological responses of Leonurus japonicus seeds and seedlings under salt and drought stress were studied.The results showed that the gibberellin soaking treatment could signifi-cantly alleviate the stress of salt and drought on the Leonurus japonicus seeds.The gibberellin of 70 mg/L was the most suitable concentration for promoting the germination of Leonurus japonicus seeds under drought stress,and the gibberellin of 50 mg/L was the most suitable concentration for promo-ting the germination of Leonurus japonicus seeds under salt stress.Both treatments significantly pro-moted the growth of the embryonic root and embryonic axis of the Leonurus japonicus seedlings and increased the antioxidant enzyme activity of the seedlings.The brassinolide of 10-5mmol/L was the most suitable concentration for promoting the germination and growth of Leonurus japonicus seeds under salt and drought stress.The comprehensive evaluation results showed that the alleviation effects of gibberellin with 70 mg/L and 50 mg/L on the physiological responses of Leonurus japonicus seeds and seedlings under salt and drought stress were higher than those of the brassinolide of 10-5 mmol/L.The study demonstrated that appropriate concentrations of gibberellin and brassinolide soa-king could promote the germination and growth of Leonurus japonicus seeds under salt and drought stress,and the effect of gibberellin was better.关键词
赤霉素/油菜素内脂/益母草/盐胁迫/干旱胁迫/种子萌发Key words
GA3/brassinolide/Leonurus japonicus/salt stress/drought stress/seed germination分类
农业科技引用本文复制引用
张永康,陈梦露,张家玮,信婷,李贺敏,夏至..外源物质对盐、旱胁迫下益母草种子萌发和幼苗生长的影响[J].种子,2026,45(2):11-18,25,9.基金项目
河南省重点研发专项(231111110900) （231111110900）
河南省土壤污染防治专项(30802583) （30802583）
