| 干旱胁迫下5种三叶草的生理反应(英文) |
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| 引用本文： | 蔺万煌,HOFMANN Rainer W,STILWELL Stephen A.干旱胁迫下5种三叶草的生理反应(英文)[J].应用与环境生物学报,2011(4):580-584. |
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| 作者姓名： | 蔺万煌 HOFMANN Rainer W STILWELL Stephen A |
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| 作者单位： | 湖南农业大学植物激素与生长发育湖南省重点实验室;林肯大学农业与生命科学部; |
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| 基金项目： | Supported by the Western Foundation of China Scholarship Council(No.063022); the Youth Foundation of Education Department of Hunan,China(No.03B011) |
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| 摘 要： | 为了解三叶草属抗旱的生理机理,寻找适宜干旱地区种植的三叶草品种,比较了地三叶草(Trifoliumsubterraneum L.)、大花三叶草(T.michelianum Savi)、白三叶草(T.repens L.)、高加索三叶草(T.ambiguum M.Bieb.)和草莓三叶草(T.fragiferum L.)在人工干旱条件下4 wk的生长和生理反应.结果表明,干旱处理下大花三叶草、草莓三叶草和白三叶草地上部分干重严重减少,分别降低了70%、66%和64%,而高加索三叶草和地三叶草减少不到50%;高加索三叶草叶片水势降低到-2.0 MPa以下,而其他4种三叶草只降低到-1.5MPa左右;高加索三叶草和草莓三叶草叶片光合速率降低25%,而地三叶草、白三叶草和大花三叶草下降35%~63%.此外,干旱条件下,5种供试三叶草叶片中游离脯氨酸含量普遍增加,其中高加索三叶草和白三叶草分别增加到2.5倍和3.1倍.研究显示高加索三叶草在多项重要生长和生理指标中表现出很强的抗旱性,因此认为其可作为干旱地区栽培白叶草的补充或替代种.图1表3参22
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| 关 键 词： | 三叶草 干旱胁迫 游离脯氨酸 光合作用 水势 |
Physiological Responses of Five Species of Trifolium to Drought Stress |
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| LIN Wanhuang,HOFMANN Rainer W & STILWELL Stephen A.Physiological Responses of Five Species of Trifolium to Drought Stress[J].Chinese Journal of Applied and Environmental Biology,2011(4):580-584. |
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| Authors: | LIN Wanhuang HOFMANN Rainer W & STILWELL Stephen A |
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| Institution: | LIN Wanhuang1,HOFMANN Rainer W2 & STILWELL Stephen A2(1Hunan Provincial Key Laboratory of Phytohormones and Growth Development,Hunan Agricultural University,Changsha 410128,China) (2Faculty of Agriculture and Life Sciences,Lincoln University,Canterbury P.O.Box 84,New Zealand) |
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| Abstract: | In order to reveal physiological mechanisms of clover under drought stress,and to identify clover species suitable for arid areas,five species,namely Trifolium subterraneum L.,T.michelianum Savi.,T.repens L.,T.ambiguum M.Bieb.and T.fragiferum L.were exposed to simulated drought for 4 weeks.The species' growth and physiological responses to drought were studied and compared.The results indicated that the aerial dry matter production of T.michelianum,T.fragiferum and T.repens decreased by 70%,66% and 64%,resp... |
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| Keywords: | clover Trifolium drought stress free proline photosynthesis water potential |
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