北方农业学报 ›› 2020, Vol. 48 ›› Issue (4): 116-120.doi: 10.12190/j.issn.2096-1197.2020.04.19

• 植物保护·草业 • 上一篇    下一篇

干旱胁迫对老芒麦苗期叶绿素荧光特性的影响

田永雷1, 白春利1, 丁海君1, 赵和平2, 房永雨1, 慕宗杰3   

  1. 1.内蒙古自治区农牧业科学院 草原研究所,内蒙古 呼和浩特 010031;
    2.内蒙古草都饲草料研究院,内蒙古 锡林浩特 026099;
    3.内蒙古自治区农牧业科学院 农牧业经济与信息研究所,内蒙古 呼和浩特 010031
  • 收稿日期:2020-06-04 出版日期:2020-08-20 发布日期:2020-10-23
  • 通讯作者: 白春利(1980—),女,副研究员,博士,主要从事牧草栽培的研究工作。
  • 作者简介:田永雷(1994—),男,研究实习员,硕士,主要从事牧草栽培的研究工作。
  • 基金资助:
    国家重点研发计划项目(2016YFC0500604,2016YFC0500500); 内蒙古农牧业创新基金项目(2020CXJJM09)

Effects of drought stress on chlorophyll fluorescence parameters of Elymus sibiricus seedlings stage

TIAN Yonglei1, BAI Chunli1, DING Haijun1, ZHAO Heping2, FANG Yongyu1, MU Zongjie3   

  1. 1. Institute of Grassland Research,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. Inner Mongolia Caodu Forage Research Institute,Xilinhot 026099,China;
    3. Institute of Agricultural and Animal Husbandry Economics and Information,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
  • Received:2020-06-04 Online:2020-08-20 Published:2020-10-23

摘要: 【目的】 研究干旱胁迫对老芒麦苗期叶绿素荧光特性的影响,为老芒麦的草种选择与生产提供理论依据。【方法】 以不同来源的野生老芒麦和老芒麦两个品系为试验材料,采用不同聚乙二醇(PEG-6000)浓度模拟干旱胁迫,观察PEG-6000胁迫对老芒麦苗期叶绿素荧光特性的影响。【结果】 随着PEG-6000浓度的增加,3种不同来源老芒麦叶片的Y(Ⅱ)值、Fv/Fm值、Fm值、qP值均呈下降趋势,Fo值和qN值均呈上升趋势;新品系老芒麦Fv/Fm值的降幅和Fo值的增幅均小于野生老芒麦和川草2号老芒麦。【结论】 新品系老芒麦的抗旱能力较强。

关键词: 老芒麦, 干旱胁迫, 苗期, 叶绿素荧光特性

Abstract: 【Objective】 To study the effect of drought stress on the chlorophyll fluorescence characteristics of Elymus sibiricus at seedling stage,so as to provide theoretical basis for the cultivation and production of Elymus sibiricus.【Methods】 Wild Elymus sibiricus and two Elymus sibiricus strains as materials,the effects of PEG-6000 stress on the chlorophyll fluorescence characteristics of Elymus sibiricus at seedling stage were observed by simulating drought stress with different PEG-6000 concentrations.【Results】 With the increase of PEG-6000 concentration,the Y(Ⅱ),Fv/Fm,Fm and qP values of three kinds of Elymus sibiricus leaves decreased,and the Fo and qN values increased;the decrease of Fv/Fm values and the increase of Fo values of new strain Elymus sibiricus were smaller than those of Hulun Buir Elymus sibiricus and Chuancao No.2 Elymus sibiricus.【Conclusion】 The drought resistance ability of new strain Elymus sibiricus was stronger.

Key words: Elymus sibiricus, Drought stress, Seedling stage, Chlorophyll fluorescence characteristics

中图分类号: 

  • Q949.714.2