中国农业科技导报2025，Vol.27Issue(2)：51-61,11.DOI:10.13304/j.nykjdb.2023.0306
外源褪黑素对盐旱复合胁迫下油莎豆种子萌发和幼苗生长的影响
Effects of Exogenous Melatonin on Seed Germination and Seedling Growth of Cyperus esculentus L.Under Salt and Drought Stress
摘要
Abstract
In order to explore the alleviation effect of exogenous melatonin on seed germination and seedling growth of Cyperus esculentus under salt and drought stress,0,50,100,150,200,250 μmol·L-1 melatonin were used to soak C.esculentus seeds,200 mmol·L-1 NaCl solution was used to simulate salt stress,and 20%PEG-6000 solution was used to simulate drought stress.The germination index,lengths of radicle and germ,biomass accumulation and other indicators of C.esculentus seeds were measured and analyzed.The results showed that 200 mmol·L-1 NaCl stress and 20%PEG-6000 stress significantly inhibited the seed germination and seedling growth of C.esculentus.50～150 μmol·L-1 melatonin promoted seed germination and seedling growth of C.esculentus under salt and drought stress,while 200～250 μmol·L-1 melatonin inhibited seed germination and seedling growth.The salt-drought combined stress increased the degree of harm to seed germination and seedling growth of C.esculentus,while exogenous melatonin had positive effect on seed germination index,radicle and germ lengths of seedling,plant dry and fresh weight.In summary,exogenous melatonin promoted the seed germination and seedling growth of C.esculentus under salt-drought stress,and the concentration of 150 μmol·L-1 had the best effect on seed germination under salt-drought combined stress,which could effectively reduce the negative effects of salt and drought on seed germination.关键词
褪黑素/盐旱复合胁迫/油莎豆/种子萌发/幼苗生长Key words
melatonin/salt-drought reciprocal stress/Cyperus esculentus L./seed germination/seedlings grow分类
农业科学引用本文复制引用
王宁宁,罗雪梅,陈明媛,郭睿,刘建国..外源褪黑素对盐旱复合胁迫下油莎豆种子萌发和幼苗生长的影响[J].中国农业科技导报,2025,27(2):51-61,11.基金项目
国家重点研发计划项目(2016YFC0501406). （2016YFC0501406）
