Acta Agrestia Sinica

›› 2010, Vol. 18 ›› Issue (1): 73-77.DOI: 10.11733/j.issn.1007-0435.2010.01.014

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Effects of Drought Stress and Rewatering on Physiological Characteristics of Three Kentucky Bluegrass Cultivars

DU Jian-xiong1,4, SHI Shang-li1, LIU Jin-rong2, HOU Xiang-yang3   

  1. 1. Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    2. Key Laboratory of Grassland Agro-Ecosystem of Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China;
    3. Grassland Research Institute, Chinese Academy of Agricultural Science, Hohhot, Inner Mongolia Autonomous Region 010010, China;
    4. School of Resources and Environmental Management, Guizhou College of Finance and Economics, Guiyang, Guizhou Province 550004, China
  • Received:2009-07-27 Revised:2009-11-18 Online:2010-02-15 Published:2010-02-15

干旱胁迫和复水对草地早熟禾3个品种生理特性的影响

杜建雄1,4, 师尚礼1, 刘金荣2, 侯向阳3   

  1. 1. 甘肃农业大学草业学院, 甘肃, 兰州, 730070;
    2. 兰州大学草地农业科技学院, 农业部草地农业生态系统学重点开放实验室, 甘肃, 兰州, 730020;
    3. 中国农业科学院草原研究所, 内蒙古, 呼和浩特, 010010;
    4. 贵州财经学院资源与环境管理学院, 贵州, 贵阳, 550004
  • 通讯作者: 刘金荣,E-mail:liujinr@lzu.edu.cn, ljr@hxu.edu.cn
  • 作者简介:杜建雄(1974- ),男,甘肃临洮人,博士研究生,研究方向为草地资源、生态与环境,E-mail:djx7401@yahoo.com.cn
  • 基金资助:
    农业部草地农业生态系统学重点开放实验室基金;甘肃省自然科学基金(0803RJZG033)资助

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Abstract: In order to explore the effects of drought and rewatering on the physiological characteristics of turfgrass,the dynamic changes of turf quality(TQ),leaf relative water content(RWC),leaf photochemical efficiency(Fv/Fm),superoxide dismutase(SOD) activity,catalase(CAT) activity,and malondialdehyde(MDA) content of three Kentucky bluegrass(Poa.pratensis L.) cultivars were studied under drought stress and rewatering conditions in this study.The results indicate that drought stress caused obvious declines in TQ,RWC,Fv/Fm,SOD activity,and CAT activity and obvious increase in MDA content of three cultivars.Following rewatering,TQ,RWC,Fv/Fm,SOD,CAT activity,and MDA content of three cultivars recovered at different degrees,but most of the tested indices of three cultivars could not completely recover to the levels of before drought stress.There were much less decline and more significant recovery in all tested indices of cultivar Merit than those of Kerley and Liberty during drought stress and rewatering,respectively.

Key words: Drought stress, Rewatering, Antioxidant enzyme system, Kentucky bluegrass

摘要： 为探究干旱和复水对草坪草生理特性的影响,研究草地早熟禾(Poa pratensis L.)3个品种在干旱胁迫及干旱后复水条件下草坪质量(TQ)、叶片相对含水量(RWC)、光化学效率(Fv/Fm)、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性和丙二醛(MDA)含量的变化。试验结果表明,干旱胁迫引起3个品种的TQ,RWC,Fv/Fm,SOD活性,CAT活性明显下降和MDA含量明显升高;复水后,3个品种的TQ,RWC,Fv/Fm,SOD活性,CAT活性和MDA含量不同程度地得以恢复,但3个品种的大部分指标都没能完全恢复到干旱胁迫前水平。Merit的各项指标较其他两个品种在干旱胁迫期间降幅小,复水后各指标恢复相对明显。

关键词: 干旱胁迫, 复水, 抗氧化酶系统, 草地早熟禾

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