| 干旱胁迫下4个野生早熟禾属草种的抗旱性研究 |
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| 引用本文： | 颜丽丽.干旱胁迫下4个野生早熟禾属草种的抗旱性研究[J].天津农业科学,2011,17(6):25-29. |
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| 作者姓名： | 颜丽丽 |
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| 作者单位： | 北京交通职业技术学院路桥系园林教研室,北京,102200 |
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| 基金项目： | 国家863计划,"十一五"国家科技支撑项目,北京市重点实验室和北京市重点学科专项,北京市教育委员会学科建设与研究生培养项目 |
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| 摘 要： | 为筛选出抗旱能力较强的野生草坪种质资源,以早熟禾栽培品种"午夜"为对照,对4个野生早熟禾属草种进行了抗旱性研究。胁迫21d期间每隔3d测定叶片相对含水量(RWC)、叶片萎蔫率(LW)、叶片相对电导率(EL)、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。结果表明:随着干旱胁迫天数的增加,RWC含量、SOD和CAT的活性都明显下降,而LW、EL和MDA的含量却明显上升,且各指标之间存在显著或极显著相关性;4个草种抗旱能力强弱依次为硬质早熟禾、草地早熟禾、早熟禾、细叶早熟禾,其中硬质早熟禾与其他材料均有显著差异,抗旱性表现较突出,为选育抗旱草坪草种提供了依据。
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| 关 键 词： | 早熟禾属 抗旱 生理反应 干旱胁迫 |
Resistance of Four Wild-grasses of Poa L.under Drought Stress |
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| YAN Li-li.Resistance of Four Wild-grasses of Poa L.under Drought Stress[J].Tianjin Agricultural Sciences,2011,17(6):25-29. |
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| Authors: | YAN Li-li |
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| Institution: | YAN Li-li(Road and Bridge Department,Landscape Architecture,Beijing Jiaotong Vocational Technical College,Beijing 102200,China) |
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| Abstract: | Taking the variety 'mid-night'as the CK,the drought stress were studied on 4 wild grasses of Poa L.During the stress period,relative water content(RWC),electrolyte leakage(EL),leaf wilting rate(LW),superoxide dismutase(SOD),catalase(CAT) and malondialdehyde(MDA) were determined in 3 d intervals.The results showed that drought stresses induced oxidative injury in all cultivars,as demonstrated by the reduction in antioxidant enzymes and increase in lipid peroxidation.Meanwhile it caused RWC to decline,while E... |
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| Keywords: | Poa L drought resistance physiological response drought stress |
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