草地学报

草地学报 ›› 2022, Vol. 30 ›› Issue (3): 655-660.DOI: 10.11733/j.issn.1007-0435.2022.03.018

• 研究论文 • 上一篇    

外源褪黑素不同浸种浓度和时长对干旱胁迫下无芒雀麦种子萌发的影响

肖珍珍1, 隋晓青1, 石国庆1, 陈爱萍1, 乌兰2, 张博1   

  1. 1. 新疆农业大学草业学院, 西部干旱荒漠区草地资源与生态教育部重点实验室, 新疆草地资源与生态重点实验室, 新疆 乌鲁木齐 830052;
    2. 乌苏市林草局, 新疆 乌苏 833000
  • 收稿日期:2021-09-06 修回日期:2021-09-29 发布日期:2022-03-30
  • 通讯作者: 隋晓青,E-mail:sxq303@xjau.edu.cn;张博,E-mail:xjauzb@sina.com
  • 作者简介:肖珍珍(1996-),女,汉族,甘肃永靖人,硕士研究生,主要从事牧草种子生产研究,E-mail:3295928005@qq.com
  • 基金资助:
    财政部和农业农村部：国家现代农业产业技术体系资助；国家自然科学基金项目(31960354)资助

Effects of Different Concentrations and Immersion Durations of Exogenous Melatonin on Seed Germination of Bromus inermis under Drought Stress

XIAO Zhen-zhen1, SUI Xiao-qing1, SHI Guo-qing1, CHEN Ai-ping1, WU Lan2, ZHANG Bo1   

  1. 1. College of Grassland Science, Xinjiang Agricultural University, Key Laboratory of Grassland Resources and Ecology of Western Arid Region, Ministry of Education, Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830052, China;
    2. Wusu forestry and grassland bureau, Wusu, Xinjiang 833000, China
  • Received:2021-09-06 Revised:2021-09-29 Published:2022-03-30

PDF

摘要： 为筛选促进干旱胁迫下无芒雀麦种子萌发的最佳外源褪黑素(MT)处理方法，本研究以不同浓度(0～200μmol·L-1)的MT分别对无芒雀麦种子浸种处理12h，24h和48h，探究处理浓度与浸种时长对干旱胁迫(23% PEG-6000)下种子萌发的影响。结果表明，外源MT显著影响干旱胁迫下无芒雀麦种子的萌发指标，隶属函数分析得出，75μmol·L-1MT浸种24h无芒雀麦种子具有最高的萌发力，此时供试材料的发芽率、发芽势、发芽指数及活力指数分别较无施加MT组提高了34.24%，68.71%，69.61%，78.14%。该研究结果可以为无芒雀麦种子浸种及干旱半干旱区禾草建植与生态修复提供一定的参考依据。

关键词: 无芒雀麦, 褪黑素, 种子萌发, PEG, 干旱胁迫

Abstract: In order to select the optimal exogenous melatonin treatment on promoting seed germination of Bromus inermis Leyss under drought stress,the effects of melatonin concentration (0～200 μmol·L-1) and immersion duration (12 h,24 h and 48 h) were investigated on seed germination under simulated drought (23% PEG-6000 simulation). The results showed that the exogenous melatonin significantly affected the germination indexes of Bromus inermis seeds under drought stress. The affiliation function analysis yielded the highest germination power of Bromus inermis seeds when immersed with 75 μmol·L-1MT for 24 h. At this time,the germination rate,germination potential,germination index and vigor index of the tested materials increased by 34.24%，68.71%，69.61%，78.14%,respectively,compared with the 0 μmol·L-1MT seed immersion group. The results of this study can provide some reference for Bromus inermis seed immersion and grassland establishment as well as ecological restoration in arid and semi-arid areas.

Key words: Bromus inermis, Melatonin, Seed germination, PEG, Drought stress

中图分类号: