江西农业学报2024，Vol.36Issue(6)：15-20,6.DOI:10.19386/j.cnki.jxnyxb.2024.06.003
硝酸镧浸种对盐胁迫下棉花种子萌发及幼苗生理特性的影响
Effects of Soaking Seeds with Lanthanum Nitrate on Seed Germination and Seedling Physiological Characteristics of Cotton under Salt Stress
摘要
Abstract
Cotton seeds were taken as research materials in this experiment,and seed germination box culture method was used to study the effects of lanthanum nitrate solution with different concentrations(0,25,50,75 and 100 mg/L)on seed germination characteristics,antioxidant enzyme activity and osmoregulatory substance content under 150 mmol/L NaCl stress.The results showed that:(1)When NaCl was 150 mmol/L,cotton seed germination was inhibited,antioxidant enzyme activity and soluble protein content of cotton seeding decreased,and soluble sugar content and malondialdehyde content increased.(2)Soaking with 50 mg/L lanthanum nitrate had the most significant effect on the germination of cotton seeds under salt stress,with a significant increase in the germination potential,germination rate,germination index,embryonic root length,germination length and biomass.(3)Soaking with lanthanum nitrate could increase the activities of antioxidant enzymes during seeding growth under salt stress.With the increase of lanthanum nitrate concentration,the contents of POD,SOD and CAT first increased and then decreased,and the content of MDA first decreased and then increased.The antioxidant enzyme activities were strongest at a concentration of 50 mg/L.(4)The contents of soluble sugar,soluble protein and proline first increased and then decreased during germination of cotton seeding under salt stress when the concentration of lanthanum nitrate increased.The content of osmoregulatory substance was the highest when the concentration of lanthanum nitrate was 50 mg/L.In conclusion,soaking with lanthanum nitrate can improve the tolerance to salt stress during the germination period of cotton seeds and seeding growth,and the effect was the most significant when the concentration was 50 mg/L.关键词
棉花/硝酸镧/盐胁迫/种子萌发/幼苗/生理特性Key words
Cotton/Lanthanum nitrate/Salt stress/Seed germination/Seedling/Physiological characteristics分类
农业科技引用本文复制引用
蒋建勋,徐婧,刘晓燕,张承礼,曹平平,王安录,郭维新,张忠波,冯国艺..硝酸镧浸种对盐胁迫下棉花种子萌发及幼苗生理特性的影响[J].江西农业学报,2024,36(6):15-20,6.基金项目
国家现代农业产业技术体系(CARS-15-18) （CARS-15-18）
河北省现代农业产业技术体系建设专项资金(HBCT2024100404) （HBCT2024100404）
河北省棉花现代种业科技创新团队(21326314D). （21326314D）
