草原与草坪2026，Vol.46Issue(1)：88-97,10.DOI:10.13817/j.cnki.cyycp.2026.01.011
外源褪黑素对NaCl胁迫下沙枣种子萌发和芽苗生长的影响
The effect of exogenous melatonin on seed germination and seedling growth of Elaeagnus angustifolia under NaCl stress
摘要
Abstract
[Objective]This study aims to explore the mitigating effects of exogenous melatonin(MT)on the seed germination of and seedling growth of Elaeagnus angustifolia under NaCl stress,and to screen for the optimal MT concentration to alleviate NaCl stress.[Method]In this study,seeds of E.angustifolia from Gansu and Ningxia provenances were used as materials to analyze the impact of exogenous MT treatments(0,50,100,200,400 μmol/L)on the germination of seeds and the growth of seedlings under NaCl stress(0,50,100,150,200,250 mmol/L).[Re-sult]1)The germination and seedling growth indicators of seeds from both provenances Gansu and Ningxia signifi-cantly decreased with the increase of NaCl concentration.2)Under NaCl stress conditions,the germination effect of Gansu E.angustifolia seeds was significantly improved under 100 μmol/L MT treatment,while the growth of the seedlings was significantly enhanced under the treatment of 200 μmol/L MT.For the ningxia provenance E.angusti-folia had the best performance in seed germination and sprout growth under 100 μmol/L MT treatment.Conversely,400 μmol/L MT had an inhibitory effect on seed germination of E.angustifolia in both provenances.3)Comprehen-sive evaluation indicated that 100 and 200 μmol/L MT are the optimal concentrations to alleviate salt stress in the germination and seedling growth of E.angustifolia from Ningxia and Gansu provenances,respectively.[Conclusion]An appropriate concentration of MT can effectively mitigate the inhibitory effects of NaCl stress on the germination and seedling growth of E.angustifolia,with the effect varying due to differences in NaCl concentration and seed sources.In addition,E.angustifolia from Ningxia has a stronger salt tolerance than that from Gansu.关键词
外源褪黑素/NaCl胁迫/种源地/沙枣/种子萌发/综合评价Key words
exogenous melatonin/NaCl stress/provenance/Elaeagnus angustifolia/seed germination/compre-hensive evaluation分类
农业科技引用本文复制引用
卢紫如,何昱璇,赵永胜,肖建华,石亚飞,王艳莉..外源褪黑素对NaCl胁迫下沙枣种子萌发和芽苗生长的影响[J].草原与草坪,2026,46(1):88-97,10.基金项目
甘肃农业大学公招博士科研启动项目(GAU-KYQD-2020-5) （GAU-KYQD-2020-5）
校企合作项目(GSAU-JSFW-2024-116-4) （GSAU-JSFW-2024-116-4）
国家自然科学基金项目(42361016) （42361016）
中国华电有限公司重点科技项目(CHDKJ23-04-01-61) （CHDKJ23-04-01-61）
