| 香蕉幼苗对钾离子吸收动力学参数研究 |
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| 引用本文： | 余小兰,谢如林,黄金生,黄美福,周柳强,谭宏伟.香蕉幼苗对钾离子吸收动力学参数研究[J].广西农业科学,2011,42(6):639-641. |
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| 作者姓名： | 余小兰 谢如林 黄金生 黄美福 周柳强 谭宏伟 |
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| 作者单位： | 1. 广西大学农学院,南宁530005;
2. 广西农业科学院农业资源与环境研究所,南宁,530007 |
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| 基金项目： | 国家科技支撑项目，国家自然科学基金重点项目，农业部科研专项项目，国际植物营养研究所(IPNI)中国项目部资助项目，广西自然科学基金项目，广西农业科学院科技发展基金重点项目 |
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| 摘 要： | 【目的】探讨香蕉幼苗时期对K＋的吸收动力学参数特征。【方法】采用改进常规耗竭法,研究香蕉幼苗对K＋吸收动力学参数。【结果】用根干重作为Michaelis-Menten方程的Vmax量纲较为合理,当K＋浓度为560mg/L时,香蕉吸K＋速度最快,吸钾量最大;当香蕉钾吸收量达到最大钾吸收量的1/2时,溶液中K＋浓度（Km）为129.2mg/L。【结论】香蕉对K＋的吸收量随着溶液中K＋浓度的增加而增加,K＋吸收动力学曲线符合Michaelis-Menten方程,Vmax量纲不同,所得到的K＋吸收动力学参数值也不同。
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| 关 键 词： | 香蕉 钾吸收 动力学参数 |
Kinetics of potassium uptake in banana seedling |
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| YU Xiao-lan,XIE Ru-lin,HUANG Jin-sheng,HUANG Mei-fu,ZHOU Liu-qiang,TAN Hong-wei.Kinetics of potassium uptake in banana seedling[J].Guangxi Agricultural Sciences,2011,42(6):639-641. |
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| Authors: | YU Xiao-lan XIE Ru-lin HUANG Jin-sheng HUANG Mei-fu ZHOU Liu-qiang TAN Hong-wei |
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| Institution: | 1 Agricultural College, Guangxi University, Nanning 530005, China; 2 Guangxi Academy of Agricultural Sciences,Agricultural Resources and Environmental Research Institute, Nanning 530007, China) |
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| Abstract: | Objective]The present study has been carried out to explore the kinetics of potassium uptake in banana seedlings at different K＋ concentrations. Method]The K＋ uptake kinetics was studied by culturing banana seedlings in solution culture supplemented with different concentrations of K＋. Result]The uptake of K＋ in banana seedlings was found highest at 560 mg/L K＋ concentration. On achieving half of the maximum K＋ uptake by banana seedlings, the K＋ concentration（Km） was recorded as 129.2 mg/L in solution. Conclusion]The uptake of K＋ by banana seedlings was found in accordance with the kinetics of Michaelis-Menten, and the uptake kinetic parameters differed due to different Vmax . |
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| Keywords: | banana potassium uptake kinetic parameters |
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