| 不同抗旱型小麦根系形态与生理特性对渗透胁迫的反应 |
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| 引用本文： | 梁银丽,杨翠玲. 不同抗旱型小麦根系形态与生理特性对渗透胁迫的反应[J]. 西北农业学报, 1995, 4(4): 31-36 |
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| 作者姓名： | 梁银丽 杨翠玲 |
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| 作者单位： | 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨陵712100;陕西省农垦科研中心, 大荔715105 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 水培试验结果表明：在渗透胁迫条件下，小麦根干重、根体积、根长度、根粗度、分枝根百分比及平均数呈相关性减少；单株生物量和绿色叶面积减少；根／冠比增大。在轻度渗透胁迫下，根系活力增高，单株日均耗水量明显减小，水分饱和亏较小，水分利用率最大，单株生物量和绝色叶面积最大。
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| 关 键 词： | 小麦 根系形态 生理特性 渗透胁迫 抗旱性 |
| 收稿时间： | 1994-09-26 |
| 修稿时间： | 1995-01-08 |
RESPONSESOFROOTSYSTEM MORPHOLOGY AND PHYSIPLOGICAL CHARACTERS ON OSMOTIC STRESS IN DROUGHT RESISTANCE WHEAT VARIETIES |
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| Liang Yinli and Yang Cuiling. RESPONSESOFROOTSYSTEM MORPHOLOGY AND PHYSIPLOGICAL CHARACTERS ON OSMOTIC STRESS IN DROUGHT RESISTANCE WHEAT VARIETIES[J]. Acta Agriculturae Boreali-occidentalis Sinica, 1995, 4(4): 31-36 |
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| Authors: | Liang Yinli and Yang Cuiling |
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| Affiliation: | State Key Laboratory of Soil Erosion and Dryland Farming on loess Plateau Institute of Soil and Water Conservation, Acadenia Sinica and Ministry of Water Conservancy, Yangling Shaanxi 712l00;The Agricultural Relamation Scientific Reasearch Center of Shamxi Provice, Dali 715105 |
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| Abstract: | Research results obtained from experiment of water cultivate showed that under osmotic stress, root dryweight,root volume,root length,root thick,branch root percentage and branch root number reduce interrelatively;biomass and leaf area per plant decrease and there is positive relation between them;root/shoot ratio increase.Under light osmotic stress(-250 kPa),root activity increases, water consum per plant tend to change gently,RA decreases obviously,WSD increases, WUE is higher than control,drymatter distribution tend to root and stem.Under osmotic stress, wheat variety Xiaoyan No.6 has higher WSD,and RA and WUE is maximum,it indicated that Xiaoyan No.6 has stronger adaptability to surroundings:Changwu 131 WSD is minimum,RA and WUE are higher, this showed that it posess stronger drought resistance;79-3-1 has bigcr plant body,water comsume is maximum,WSD is less,RA and WUE are minimum,this showed that it need more water supply. |
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| Keywords: | Wheat root system Morphology Physiological character Osmotic stress Drought resistance |
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