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草业学报 ›› 2013, Vol. 22 ›› Issue (3): 184-.DOI: 10.11686/cyxb20130324

• 研究论文 • 上一篇    下一篇

细叶芒苗期耐旱性分析

陈敏1,2,侯新村2,范希峰2,武菊英2,潘远智1*   

  1. 1.四川农业大学风景园林学院,四川 雅安 611130;
    2.北京草业与环境研究发展中心,北京 100097
  • 出版日期:2013-06-20 发布日期:2013-06-20
  • 通讯作者: E-mail:scpyzls@163.com
  • 作者简介:komachenmin@163.com
  • 基金资助:
    北京市农林科学院科技创新能力建设专项(KJCX201101003,KJCX201102005)资助。

Drought tolerance analysis of Miscanthus sinensis ‘Gracillimu’ seedlings

Drought tolerance analysis of Miscanthus sinensis ‘Gracillimu’ seedlingsCHEN Min1,2, HOU Xin-cun2, FAN Xi-feng2, WU Ju-ying2, PAN Yuan-zhi1   

  1. Drought tolerance analysis of Miscanthus sinensis ‘Gracillimu’ seedlings
    CHEN Min1,2, HOU Xin-cun2, FAN Xi-feng2, WU Ju-ying2, PAN Yuan-zhi1
    (1.Landscape Architecture College of Sichuan Agricultural University, Ya’an 611130, China; 2.Beijing
    Research and Development Center for Grass and Environment, Beijing 100097, China)
  • Online:2013-06-20 Published:2013-06-20

摘要: 为揭示细叶芒苗期的耐旱性,本试验通过盆栽土培法研究了田间最大持水量的80%(CK),60%(LS),40%(MS)和20%(HS) 对细叶芒苗期植物学特征和生理生化特征的影响。结果表明,随着干旱胁迫强度的增加,细叶芒苗期株高、绿叶面积、分蘖、生物量均下降,根冠比增加;叶片Pn、Gs、Ci浓度、Tr下降,WUE升高,Pn、Gs、Ci浓度、Tr在MS处理下与CK相比分别下降48.05%,40.86%,43.52%和65.41%,WUE增加50.21%;叶片相对含水量降低,在MS处理下与CK相比下降26.64%,Chl-a、Chl-b和Chl呈先增加后减少趋势,在MS处理下含量达到最大值,分别增加59.11%,65.64%和29.11%;MDA含量、SOD活性和Pro含量上升,在HS处理下与CK相比分别增加73.68%,95.20% 和83.30%。综合分析得出细叶芒苗期对干旱环境有一定的适应性。

Abstract: To assess the drought tolerance of Miscanthus sinensis ‘Gracillimu’ seedlings, the effects of 80%, 60%, 40% and 20% of the maximum field water holding capacity on the botanical, physiological and biochemical characteristics were assessed in a seedling incubation pot experiment. With an increase in water stress, the height, leaf area, tillering and biomass decreased but root/shoot ratio increased. Compared with the CK, under mild stress, Pn, Gs, Ci and Tr decreased by 48.05%, 40.86%, 43.52% and 65.41%, respectively, while WUE increased by 50.21%. The relative leaf water content under mild stress decreased by 48.05% compared with the CK, while the contents of Chl a, Chl b and total Chl increased by 59.11%, 65.64% and 29.11%, respectively, but then decreased. Under heavy stress MDA content, SOD activity and Pro content increased by 73.68%, 95.20%, and 83.30%, respectively compared with the CK. Therefore M. sinensis ‘Gracillimu’ seedlings have some ability to adapt to a drought environment.

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