| 不同年代玉米品种根系对低氮干旱胁迫的响应分析 |
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| 引用本文： | 牛平平,穆心愿,张星,杨春收,李潮海.不同年代玉米品种根系对低氮干旱胁迫的响应分析[J].作物学报,2015,41(7):1112-1120. |
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| 作者姓名： | 牛平平 穆心愿 张星 杨春收 李潮海 |
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| 作者单位： | 1 河南农业大学农学院 / 河南粮食作物协同创新中心，河南郑州 450002；2 郑州市粮丰农业科技有限公司，河南郑州 450002 |
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| 基金项目： | 本研究由国家公益性行业(农业)科研专项(201203100)和国家现代农业产业技术体系建设专项(CARS-02-19)资助。 |
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| 摘 要： | 以1973年以来5个主推玉米品种中单2号、丹玉13、掖单13、农大108、郑单958以及新品种豫单606为材料,在低氮和低氮干旱复合胁迫下,研究了品种更替过程中根系变化特征。结果表明,随年代推进,玉米品种根干重、根长及根表面积呈先升后降又升的趋势,早期品种的3个根系性状逐渐增加,以获取更多的水分和养分,现代品种的3个根系性状逐渐减少,以减少冗余器官的消耗,而新品种有所上升,以满足产量持续增长所需水分和养分。在低氮和低氮干旱复合胁迫下,与早期品种相比,现代品种根干重变化小,但根长和根表面积增加多,根系平均直径变细,伤流量减少不显著。上述结果表明,不同年代玉米品种根系逐渐优化,现代品种根系形态调节能力增强,对低氮和低氮干旱复合胁迫的耐性提高。
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| 关 键 词： | 不同年代 玉米 根系 低氮 低氮干旱复合胁迫 |
| 收稿时间： | 2014-12-31 |
Response of Roots of Maize Varieties Released in Different Years to Low Nitrogen and Drought Stresses |
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| NIU Ping-Ping,MU Xin-Yuan,ZHANG Xing,YANG Chun-Shou,LI Chao-Hai.Response of Roots of Maize Varieties Released in Different Years to Low Nitrogen and Drought Stresses[J].Acta Agronomica Sinica,2015,41(7):1112-1120. |
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| Authors: | NIU Ping-Ping MU Xin-Yuan ZHANG Xing YANG Chun-Shou LI Chao-Hai |
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| Institution: | 1.Agronomy College, Henan Agricultural University / Collaborative Innovation Center of Henan Grain Crops, Zhengzhou 450002, China;2.Zhengzhou Liangfeng Seed Industry Co., Ltd. Zhengzhou 450002, China |
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| Abstract: | The changes in root characteristics were studied under low nitrogen stress (LN) and combined stress of low nitrogen and drought (LD) using six maize varieties released from 1973 to 2009, including Zhongdan 2, Danyu 13, Yedan 13, Nongda 108 Zhengdan 958, and a new variety Yudan 606. The result showed that root dry weight, root length and root surface area of the varieties increased at first and then decreased, finally increased again in the process of time. The increase of the three parameters in earlier released varieties could get more water and nutrition from soil, the decrease of these in later released varieties was available to reduce the redundant organ’s dry matter consumption, and the increase again of these in the new variety would meet water and nutrition requirements for yield increase continuously. Compared with the old varieties, root dry weight of the modern varieties changed smaller, root length and surface areas increased more, root average diameter became thinner, root bleeding sap decreased non-significantly under the LN and LD conditions. These results suggested that root characteristics of the varieties have been optimized gradually, the adjustment ability of root morphology, and the LN and LD stress tolerance in modern varieties have been increased. |
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| Keywords: | Different eras Maize Root Low nitrogen Combined stress of low nitrogen and drought |
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