| 钙螯合剂对小麦幼苗氮代谢和干物重的影响 |
| |
| 引用本文： | 王学奎,李合生,刘武定. 钙螯合剂对小麦幼苗氮代谢和干物重的影响[J]. 植物营养与肥料学报, 2000, 6(1): 42-47. DOI: 10.11674/zwyf.2000.0107 |
| |
| 作者姓名： | 王学奎 李合生 刘武定 |
| |
| 作者单位： | 1.华中农业大学 湖北武汉430070 |
| |
| 基金项目： | ①国家自然科学基金资助项目(39670432) |
| |
| 摘 要： | 营养液中添加钙螯合剂EGTA[Glycol bis ( aminoethyl)etherN ,N ,N ,N tetraaceticacid ,乙二醇双 (-氨基乙基 )醚四乙酸 ]导致小麦幼苗干物质累积下降 ,降低地上部和地下部全钙含量 ,抑制小麦幼苗对外源硝态氮的吸收及其向地上部的运输 ,改变其在不同器官中的分配比例和影响其向氨基氮或可溶性蛋白质的转化。叶片和根中硝酸还原酶活性与相应器官中的NO3--N含量相关 ,叶片中谷氨酰胺合成酶 (GS)活性在EGTA处理后明显下降 ,根中GS活性变化不显著。
|
| 关 键 词： | 钙螯合剂 小麦 氮代谢 硝酸还原酶 谷氨酰胺合成酶 |
| 修稿时间： | :1999-02-0 |
EFFECTS OF CALCIUMCHELATOR ON THE NITROGEN METABOLISM AND DRY MATTER ACCUMULATION IN WHEAT SEEDLINGS |
| |
| Wang Xuekui Li Hesheng Liu Wuding Wu Suhui Shun Jingjing. EFFECTS OF CALCIUMCHELATOR ON THE NITROGEN METABOLISM AND DRY MATTER ACCUMULATION IN WHEAT SEEDLINGS[J]. Plant Nutrition and Fertilizer Science, 2000, 6(1): 42-47. DOI: 10.11674/zwyf.2000.0107 |
| |
| Authors: | Wang Xuekui Li Hesheng Liu Wuding Wu Suhui Shun Jingjing |
| |
| Affiliation: | 1.Huazhong Agricultural University;Wuhan?430070 |
| |
| Abstract: | Calcium chelator EGTA (Glycol-bis-(α-aminoethyl)ether-N, N, N′, N′-tetraacetic acid) which was supplied to 1/2 Hoagland cultural solution caused the obvious decrease of total calcium content and dry matter accumulation in wheat seedlings, inhibited the absorption of nitrate and its translocation to up ground parts, changed the distribution ratio of 15N nitrate in different organs, and decreased the synthesis of soluble protein from amino nitrogen in leaf and the transformation of nitrate into amino nitrogen in root. The activities of nitrate reductase (NR) in leaf and root were basically related to the content of nitrate in the relevant organs, the glutamine synthetase(GS) activity in leaf was decreased significantly under EGTA treatment, but the GS activity changed weakly in root. |
| |
| Keywords: | |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
|
点击此处可从《植物营养与肥料学报》下载免费的PDF全文 |
|
