| 铵态氮和硝态氮营养对水、旱稻根系形态及水分吸收的影响 |
| |
| 引用本文： | 李勇,周毅,郭世伟,沈其荣.铵态氮和硝态氮营养对水、旱稻根系形态及水分吸收的影响[J].中国水稻科学,2007,21(3):294-298. |
| |
| 作者姓名： | 李勇 周毅 郭世伟 沈其荣 |
| |
| 作者单位： | 南京农业大学 资源与环境科学学院， 江苏 南京 210095； *通讯联系人， E-mail：sguo@njau.edu.cn |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
| |
| 摘 要： | 为研究不同形态氮素营养对水稻和旱稻根系生长及水分吸收的影响，采用水培供应不同形态氮素(铵态氮、硝态氮、铵态氮和硝态氮混合)的方法培养水稻和旱稻，并对水稻和旱稻的根系形态进行了扫描分析；同时，通过测定根系伤流液和采用HgCl2抑制水通道蛋白活性的方法，比较了水稻和旱稻根系对不同氮素形态响应的差异。 铵态氮营养水稻（或旱稻）的根干质量明显低于硝态氮营养水稻（或旱稻），但单位根表面积的水分吸收与根系伤流液量比硝态氮营养高；3种形态氮素营养水稻（或旱稻）运输水分的主要方式均是水通道蛋白的跨膜运输途径，但铵态氮营养水稻（或旱稻）的根系通过水通道蛋白跨膜运输途径运输水分的能力明显高于硝态氮营养水稻（或旱稻）；与水稻相比，旱稻对硝态氮营养具有较强的适应性。
|
| 关 键 词： | 水稻 旱稻 氮素形态 水通道蛋白 根系伤流液 水分吸收 根系形态 |
| 文章编号： | 1001-7216（2007）03-0294-05 |
| 收稿时间： | 2006-09-04 |
| 修稿时间： | 2006-09-042007-03-12 |
Effects of Different N Forms on Root Morphology and Water Absorption of Lowland and Upland Rice Plants |
| |
| LI Yong,ZHOU Yi,GUO Shi-wei,SHEN Qi-rong.Effects of Different N Forms on Root Morphology and Water Absorption of Lowland and Upland Rice Plants[J].Chinese Journal of Rice Science,2007,21(3):294-298. |
| |
| Authors: | LI Yong ZHOU Yi GUO Shi-wei SHEN Qi-rong |
| |
| Institution: | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China |
| |
| Abstract: | A hydroponic experiment was conducted to study the effects of different N forms on root growth and water absorption of lowland and upland rice plants. Root dry weights of lowland and upland rice plants supplied With ammonium nutrition were lower than those with nitrate nutrition, while the amount of root bleading sap and water absorption per root surface area were higher in the plants supplied with ammonium nutrition than in those with nitrate nutrition. It was demonstrated that the aquaporin pathway of water absorption is the main approach of lowland and upland rice roots supplied with three different N forms, but the capacity of aquaporin for water transportation in lowland and upland rice roots was higher in ammonium nutri- tion than in nitrate nutrition. Moreover, upland rice was more adaptive to nitrate supply than lowland rice. |
| |
| Keywords: | lowland rice upland rice nitrogen form aquaporin root bleeding sap water absorption root morphology |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国水稻科学》浏览原始摘要信息 |
| 点击此处可从《中国水稻科学》下载免费的PDF全文 |
