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草业学报 ›› 2011, Vol. 20 ›› Issue (5): 34-41.

• 研究论文 • 上一篇    下一篇

偃麦草属植物种间苗期抗旱性评价

孟林1,杨宏新1,毛培春1,高洪文2   

  1. 1.北京市农林科学院 北京草业与环境研究发展中心,北京 100097;
    2.中国农业科学院北京畜牧兽医研究所,北京 100193
  • 出版日期:2011-10-20 发布日期:2011-10-20
  • 作者简介:孟林(1966-),男,内蒙古乌兰察布人,博士。
  • 基金资助:
    “十一五”国家科技支撑项目(2008BADB3B01,2008BADB3B05),农业部牧草种质资源保护项目和北京市农林科学院科技创新能力建设专项(KJCX201101003)资助。

Assessment of interspecies drought resistance of Elytrigia at the seedling stage

MENG Lin1, YANG Hong-xin1, MAO Pei-chun1, GAO Hong-wen2   

  1. 1.Beijing Research and Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing 100193, China
  • Online:2011-10-20 Published:2011-10-20

摘要: 采用温室模拟干旱胁迫-复水法,对收集自6个国家的10种偃麦草属植物的种间苗期抗旱性进行综合评价,分别于干旱胁迫开始前(CK),连续干旱胁迫7,14,21,28,35 d,以及复水7 d后,对其叶片相对含水量(RWC)、相对电导率(REC)、脯氨酸含量(Pro)、丙二醛含量(MDA)、可溶性糖含量(SSC)5个抗旱生理指标,以及干旱胁迫到35 d时复水7 d后的植株平均存活率(ASR)进行测定分析,并采用欧氏距离法进行5个生理指标的综合聚类分析,可将10个植物种划分为3个抗旱等级,即相对抗旱的包括:ET001、EPU02、EJ003和EH001;中等抗旱的包括ES001、EE013和EC002;相对旱敏感的包括:ER037、EL001和EI022。

Abstract: The drought resistance of 10 species of Elytrigia, collected from six countries, was identified and evaluated using simulated drought stress and rewatering in a green house at the seedling stage. The relative water content of leaves (RWC), relative electrical conductivity rate (REC), free proline accumulation (Pro), contents of malondialdehyde (MDA) and the soluble sugar content (SSC) were measured at 0 (CK), 7, 14, 21, 28, and 35 days of drought stress and 7 days after rewatering. Their average survival rates (ASR) after 35 days of drought stress followed by the rewatering were calculated. The three drought resistant classes: high drought resistance (ET001, EPU02, EJ003 and EH001), medium drought resistance (ES001, EE013 and EC002) and weak drought resistance (ER037, EL001 and EI022) were classified using the above 5 physiological indexes by the Euclidean distance clustering method.

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