| 小麦对钾高效吸收的根系形态学和生理学特征 |
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| 引用本文： | 邹春琴,李振声,李继云.小麦对钾高效吸收的根系形态学和生理学特征[J].植物营养与肥料学报,2001,7(1):36-43. |
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| 作者姓名： | 邹春琴 李振声 李继云 |
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| 作者单位： | 1.中国科学院遗传研究所 北京100101; |
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| 基金项目： | 国家自然科学基金重大项目资助（39790100）。 |
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| 摘 要： | 用 6个小麦品种作为试验材料 ,研究了钾效率不同小麦的根系形态学和生理学特征 ,以及对K+吸收的动力学参数。结果表明 ,高效吸收钾的品种根系长、半径小、吸收面积大、Km小、Imax大。低效低响型品种京核 1号的最小临界浓度值 (Cmin)小。根系形态学和生理学特征可以作为筛选高效吸钾小麦品种的参考指标。K+吸收的动力学参数可以作为钾高效吸收和低响型小麦品种的筛选指标 ,最好的筛选指标是将根系形态和生理特性相结合。根系分泌H+的能力与K+的吸收无明显相关。
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| 关 键 词： | 小麦 钾效率 根系形态学特征 根系生理学特征 |
| 文章编号： | 1008-505X（2001）01-0036-08 |
| 修稿时间： | 1999年11月2日 |
Study on difference in
morpholofical and physiological characters of wheat varieties to potassium |
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| ZOU Chun qin,LI Zhen sheng,LI Ji yun.Study on difference in
morpholofical and physiological characters of wheat varieties to potassium[J].Plant Nutrition and Fertilizer Science,2001,7(1):36-43. |
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| Authors: | ZOU Chun qin LI Zhen sheng LI Ji yun |
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| Institution: | 1.Inst of Genetics;CAS;Beijing 100101;China; |
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| Abstract: | The differences in morphological and physiological characters ofsix wheat varieties to potassium were studied using solution culture . The K uptake efficient one such as 92117 and Taihe 5025 had the advantage in root length, root radius(Tab.1), uptake areas(Tab. 2) , Km and Imax(Tab. 3). The inefficient ones such as Jinghe 1 with low Cmin could be tolerant to low K stress. There wasn't apparent relation of H+ excretion and K+ uptaked by roots(Fig.1).The morphological and physiological characters of roots could be only reference to screen K efficient uptake of wheat and kinetics parameters should be index for getting wheat with high K efficiency and tolerance to low K stress. So it was better to combine the morphological characters of roots with kinetics parameters as an index. |
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| Keywords: | wheat K efficiency morphological characters of roots physiological characters of roots |
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