| 棉花根系生长与叶片衰老的协调性 |
| |
| 基金项目： | This study was supported by the National Natural Science Foundation of China (31271648, 31571600).(31271648);This study was supported by the National Natural Science Foundation of China (31271648, 31571600).(31571600) |
| |
| 摘 要： | 为探索棉花根系生长和叶片衰老之间的协调性,选用早熟性一致但衰老快慢有明显差异的棉花基因型百棉1号(叶片衰老慢)和DP99B (叶片衰老快),于2011—2012年,在田间条件下研究了其根系生长和活力、叶片衰老和产量。结果表明, 2年间百棉1号的纤维产量(皮棉及霜前皮棉)均显著高于DP99B。百棉1号的叶片光合作用或基于吸收光能的性能指数显著高于DP99B。百棉1号的根系长度密度和根系深层分布比例及根系活力(以伤流液总量和伤流液蛋白质含量表示)显著高于DP99B。2012年结果显示,DP99B根系生长比百棉1号快,并且DP99B根系长度密度及根系活力分别在8月中旬和7月下旬显著高于百棉1号,且伤流液分泌总量是百棉1号的1.7倍。棉花盛花期后,根系密度大、伤流液分泌多和叶片衰老晚具有一致性,证实棉花叶片衰老受后期根系生长和活力的调控。
|
| 收稿时间： | 2019-03-18 |
Coordination of root growth and leaf senescence in cotton |
| |
| Authors: | WANG Su-Fang XUE Hui-Yun ZHANG Zhi-Yong TANG Ju-Xiang |
| |
| Institution: | Henan Institute of Science and Technology/Henan Collaborative Innovation Center of Modern Biological Breeding/Henan Key Laboratory for Molecular Ecology and Germplasm Innovation of Cotton and Wheat, Xinxiang 453003, Henan, China |
| |
| Abstract: | Two cotton cultivars, Baimian 1 and DP99B, were used to investigate the root growth and vigor, leaf senescence and yield in the field during 2011-2012. Baimian 1 produced higher cotton fiber yield than DP99B during two years. Baimian 1 had better leaf photosynthetic rate or performance index based on light energy absorption, higher root length density (RLD) and better root distribution, and higher root vigor than DP99B, evidenced by higher volume of bleeding sap, in which higher percentage of protein contents was contained. In 2012, DP99B had faster root growth with higher RLD at middle August and higher root vigor at late July than Baimian 1, and the total xylem sap amount of DP99B was 1.7 times that of Baimian 1. After bloom peaking, the higher density of root, more bleeding sap and slower leaf senescence showed the coordination to a great extent, confirming that leaf senescence is regulated by root growth and root vigor in later cotton growth season. |
| |
| Keywords: | cotton root distribution root length density bleeding sap leaf senescence |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《作物学报》浏览原始摘要信息 |
| 点击此处可从《作物学报》下载免费的PDF全文 |
|
