| 开花后水分亏缺对小麦生理影响与化学调控的补偿效应 |
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| 引用本文： | 段留生,关彩虹,何钟佩,翟志席.开花后水分亏缺对小麦生理影响与化学调控的补偿效应[J].中国生态农业学报,2003,11(4):114-117. |
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| 作者姓名： | 段留生 关彩虹 何钟佩 翟志席 |
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| 作者单位： | 中国农业大学作物化学控制研究中心,国家植物生理生化重点实验室,北京,100094 |
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| 基金项目： | 国家农业科技成果转化基金项目 ( 0 2EFN 2 1 6 90 0 753)资助 |
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| 摘 要： | 旱棚PVC管栽培冬小麦“京冬 8号”试验研究结果表明 ,小麦开花后水分亏缺影响氚水 (3H2 O)在其根系和旗叶中动态、初生根和穗下节维管束特征、根系活力、叶片蒸腾速率、气孔阻力和14C同化物输出速率及比例。用植物生长延缓剂HK 6拌种和起身期叶面喷施处理 ,可增加初生根大导管和维管束鞘横截面积 ,提高根系活力 ,促进根系3H2 O的吸收和向地上部器官运输 ;增加穗下节大维管束横截面积 ,并可能促进水分向穗部运输 ;增加旗叶中气孔阻抗 ,维持适当水分蒸腾速率 ,缓解水分胁迫下叶片3H2 O的减少 ;提高单株水分利用效率 ,化学控制处理可缓解和补偿水分胁迫对小麦生理造成的不良影响 ,对小麦节水栽培和抗旱增产具有应用潜力
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| 关 键 词： | 小麦 水分亏缺 植物生长调节剂 补偿效应 |
| 收稿时间： | 2002/12/8 0:00:00 |
| 修稿时间： | 2002年12月8日 |
Compensative effects of plant chemical regulation Of physiological harm caused by water stress after flowering of winter wheat |
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| DUAN Liu-Sheng,GUAN Cai-Hong,HE Zhong-Pei and ZHAI Zhi-Xi.Compensative effects of plant chemical regulation Of physiological harm caused by water stress after flowering of winter wheat[J].Chinese Journal of Eco-Agriculture,2003,11(4):114-117. |
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| Authors: | DUAN Liu-Sheng GUAN Cai-Hong HE Zhong-Pei and ZHAI Zhi-Xi |
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| Abstract: | The experiment was conducted with winter wheat cv. Jin gd ong 6 in PVC pipe and under rain free condition. It is indicated that all the di stribution of 3H 2O in roots and flag leaf, characteristics of vascular b und le in primary roots and internode below ear, roots validity, transpiration rate and stomatal impedance of flag leaf are changed by water stress after flowering. The treatments of seed coating and foliage spraying at early jointing stage usi ng Beinong 6(HK6),a plant growth regulator, are proved to release and compensate the harmful effects of water stress. Both the area of vascular bundle in primar y roots and internode below ear are increased by HK6,while the roots validity an d the ability of water absorption and transportation are promoted. In flag leaf, stomatal impedance is changed to maintain the transpiration rate and the water use efficiency of single wheat plant is higher. The rate and ratio of 14 C-assimilates exported from flag leaf are increased by the chemical regula tion. |
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| Keywords: | Winter wheat Water stress Plant growth regulator Com pensative effects |
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