| 橡胶树幼苗磷吸收的动力学参数 |
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| 引用本文： | 王羽,华元刚,罗微.橡胶树幼苗磷吸收的动力学参数[J].热带作物学报,2010,31(6):926-929. |
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| 作者姓名： | 王羽 华元刚 罗微 |
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| 作者单位： | 1. 中国热带农业科学院橡胶研究所,农业部橡胶树生物学重点开放实验室,国家重要热带作物工程技术研究中心,海南,儋州,571737
2. 海南大学农学院,海南,儋州,571737 |
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| 基金项目： | 海南省自然科学基金，国家天然橡胶产业技术体系建设专项资金项目 |
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| 摘 要： | 采用改进的常规耗竭法,对橡胶树幼苗吸收H2PO4-的动力学参数进行测定,结果表明:橡胶树幼苗对营养液中H2PO4的吸收动力学符合Michaelis-Menten方程。分别采用Lineweaver-Burk方程、Eadie-Hofstee方程、Hanes方程处理数据,结果显示拟合程度最好的是Lineweaver-Burk方程。橡胶树品系热研7-33-97芽接籽苗的吸收动力学参数Vmax与Km值均为最大,吸磷能力明显高于品系RRIM600实生苗和GT1实生苗,且吸收速率达到最大吸收速率时对环境中磷浓度的要求也最高,在一定的发育时期内,随着苗龄的增加,Vmax有减弱的趋势,Km值也存在一定差异。
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| 关 键 词： | 橡胶树幼苗 H2PO4 动力学参数 |
Kinetic Parameters of Phosphorus Uptake for Rubber Buddings |
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| Wang Yu,Hua Yuangang and Luo Wei.Kinetic Parameters of Phosphorus Uptake for Rubber Buddings[J].Chinese Journal of Tropical Crops,2010,31(6):926-929. |
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| Authors: | Wang Yu Hua Yuangang and Luo Wei |
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| Abstract: | The uptake kinetics of rubber buddings to H2PO4-(P)with an improved conventional depletion method was studied. The results indicated that the uptake of H2PO4- in nutritional liquid in rubber buddings was generally in accord with the kinetic of Michaelis-Menten, and Lineweaver-Burk equation was the best fit among Lineweaver-Burk, Eadie-Hofstee, and Hanes linear equations to process the data. In the 3 rubber buddings, Vmax and Km of the clone of SCATC 7-33-97 buddings was the highest, which showed that not only the P uptake ability of it was higher than the others obviously, but also its requirement to P density of the environment was the highest when the uptake rate reached to the Vmax. But the Vmax would decline with the buddings growing in a certain developmental period. |
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| Keywords: | H2PO4- |
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