| 白菜不同品种对硝酸盐吸收积累差异原因初探 |
| |
| 引用本文： | 董晓英,李式军,沈仁芳.白菜不同品种对硝酸盐吸收积累差异原因初探[J].园艺学报,2003,30(4):470-472. |
| |
| 作者姓名： | 董晓英 李式军 沈仁芳 |
| |
| 作者单位： | ( 土壤与农业可持续发展国家重点实验室，中国科学院南京土壤研究所，南京210008； 南京农业大学园艺学院．南京210095) |
| |
| 基金项目： | 国家自然科学基金项目(39570496) |
| |
| 摘 要： | 用两组积累硝酸盐不同的白菜品种作试材，测定其吸收硝酸盐的速率、动力学常数Km与V一、硝酸还原代谢库内硝酸根浓度(MPS)和硝酸还原酶活性(NRA)，结果表明，不同白菜品种吸收硝酸根的速率、Km与V 、MPS、NRA存在较大的差异；硝酸盐积累的差异主要是由于吸收硝酸根的速率不同，与硝酸根在其体内的运转、代谢并无显著直接相关。
|
| 关 键 词： | 白菜 硝酸盐 吸收 |
| 文章编号： | 0513-353X(2003)04-0470-03 |
| 修稿时间： | 2002年11月1日 |
The Nitrate Uptake and Accumulation of Pak-choi |
| |
| Dong Xiaoying ,Li Shijun ,and Shen Renfang.The Nitrate Uptake and Accumulation of Pak-choi[J].Acta Horticulturae Sinica,2003,30(4):470-472. |
| |
| Authors: | Dong Xiaoying Li Shijun and Shen Renfang |
| |
| Institution: | ( State Key Laboratory ofSoil and Sustainable Agriculture，Institute ofSoil Science，Chinese Academy & ，Nanfing 210008，China； College fHortiulture，Nanjing Agricultural Urdvirsuy，210095，China) |
| |
| Abstract: | Four pak choi cultivars with different nitrate accumulation level were applied for explaining their genotypic variation in nitrate accumulation.Their dynamics parameters in nitrate uptaking,Michaelis constant(Km),the maximum uptake Velocity(V max ),nitrate content in nitrate maetabolic pool(MPS)and nitrate reductase activity(NRA),were measured,results showed that Km and V max ,MPS,NRA varied greatly in different pak choi cultivars.But there was no relationship between nitrate content and NRA,MPS.Their variation in nitrate accumulation more resulted from their different uptake rate of nitrate than their NRA,MPS. |
| |
| Keywords: | Pak choi Nitrate accumulation Absorption |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《园艺学报》浏览原始摘要信息 |
| 点击此处可从《园艺学报》下载免费的PDF全文 |
