| 侧柏不同种源对水分胁迫反应的初步研究——水分状况、电导率和叶萎蔫表现 |
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| 引用本文： | 戴建良,王芳,何虎林,王铮刚.侧柏不同种源对水分胁迫反应的初步研究——水分状况、电导率和叶萎蔫表现[J].甘肃林业科技,1997(2). |
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| 作者姓名： | 戴建良 王芳 何虎林 王铮刚 |
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| 作者单位： | 北京林业大学 |
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| 摘 要： | 模拟土壤干旱条件，从苗木水分状况、细胞相对透性和叶萎蔫表现等３个方面，研究了侧柏５个种源３年生盆栽苗的抗旱性及其差异。试验结果表明，在干旱胁迫下，北方种源苗木较南方种源的水势下降较慢，叶细胞膨压为零时的土壤含水量及土壤水势临界值较低，叶细胞相对透性增大较慢，耐旱性较强；生理指标所反映的种源耐旱性强弱与对叶萎蔫表现的观察结果基本一致；供试种源抗旱能力可排列为：密云＞志丹＞登封＞徐州＞黎平
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| 关 键 词： | 侧柏 种源 膨压 细胞相对透性 抗旱性 |
Studies on Seedlings Physiological Responses to Water Stress for Provenances of Platycladus orientalis (L.) Franco |
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| Dai Jianliang,Wang Fang,He Huling.Studies on Seedlings Physiological Responses to Water Stress for Provenances of Platycladus orientalis (L.) Franco[J].Journal of Gansu Forestry Science and Technology,1997(2). |
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| Authors: | Dai Jianliang Wang Fang He Huling |
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| Institution: | Dai Jianliang Wang Fang He Huling (BeiJing Forestry Vniversity) (GanSu Forestry Research Insiritute) Wang Zhenggang (Gansu Forestry Industrid and Comercial Compang) |
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| Abstract: | With the 3-year-old seedlings of representative provenances of Platycladus orientalis (L.) Franco, physiological reponses and leaf wilting to waterstress undernatural soil desication were studied. The result indicated as follows: With waterstress increasing,the water potential of Miyun, Zhidan and Xuzhou decreased more slowly, meanwhile Miyun and Zhidan lost cell turgor at lower level of soil water content. Compared to northern provenances, cell membrane permeability of southern provenaces in creased more quickly. Under serious water stress, the percentages of leaf permanent wilting for Miyun and Zhidan were lower than others. It showed that northern provenances had stronger ability to adjust water balance and were injured more slightly, and northern provenances possessed stronger drought-resistance among the tested provenances. |
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| Keywords: | Orientalis Provenances Turgor Membrane permeability Drougt-resistance |
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