| 不同烤烟基因型钾吸收特性及其根皮层细胞内向钾电流差异研究 |
| |
| 引用本文： | 鲁黎明,杨秋云,杨铁钊.不同烤烟基因型钾吸收特性及其根皮层细胞内向钾电流差异研究[J].河南农业大学学报,2007,41(3):251-254. |
| |
| 作者姓名： | 鲁黎明 杨秋云 杨铁钊 |
| |
| 作者单位： | 河南农业大学农学院,河南,郑州,450002 |
| |
| 基金项目： | 国家烟草专卖局科技攻关项目 |
| |
| 摘 要： | 对4个烤烟基因型进行了根系钾吸收动力学特性研究,并对其根皮层细胞质膜内向跨膜钾电流进行了全细胞记录.结果表明,农大202与NC 89的Vmax明显高于净叶黄及NC 2326,而它们的Km值则低于净叶黄及NC2326.全细胞内向跨膜钾电流的记录表明,NC 89的电流密度(pA/pF)最高,其次为农大202及净叶黄,而以NC2326的电流密度最小.结果还表明,基因型对K 亲和力及吸收能力是影响烤烟钾营养效率高低的重要因素.
|
| 关 键 词： | 烤烟 钾效率 内向钾电流 吸收动力学 |
| 文章编号： | 1000-2340（2007）03-0251-04 |
| 收稿时间： | 2007-02-01 |
| 修稿时间： | 2007-02-01 |
Study on the Difference of Characteristics of Potassium Absorption of Different Flue-Cured Tobacco Genotypes and Their Whole Cell Inward Potassium Current |
| |
| LU Li-ming,YANG Qiu-yun,YANG Tie-zhao.Study on the Difference of Characteristics of Potassium Absorption of Different Flue-Cured Tobacco Genotypes and Their Whole Cell Inward Potassium Current[J].Journal of Henan Agricultural University,2007,41(3):251-254. |
| |
| Authors: | LU Li-ming YANG Qiu-yun YANG Tie-zhao |
| |
| Institution: | College of Agriculture, Henan Agricultural University, Zhengzhou 450002, China |
| |
| Abstract: | The characteristics of K uptake kinetics of four flue-cured tobacco genotypes were studied and their whole cell transmembrane inward K current of root cortex protoplast were recorded.The results showed that the Vmax of Nongda 202 and NC 89 were obviously higher than that of Jingyehuang and NC 2326 while their Km were lower than that of the other two.The inward K current recorded indicated that the current density(pA/pF) of NC 89 was the highest one of all four genotypes,Nongda 202,Jingyehuang coming next and NC 2326 the lowest.The results suggest that the capacity of K affinity and uptake is one of the major factors that determine K nutrition efficiency of flue-cured tobacco. |
| |
| Keywords: | flue-cured tobacco K efficiency inward K current uptake kinetics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
