Responses of radial and axial hydraulic resistances in maize root to nitrogen availability
文献类型：SCI/SSCI论文
| 作者 | Li Y. Y. ; Shao M. G. |
| 发表日期 | 2003 |
| 关键词 | maize nitrogen root hydraulic resistances zea-mays-l deficient cotton seedlings water transport mercuric-chloride conductivity conductance channels anatomy plants cells |
| 英文摘要 | One of the important physiological mechanisms of nitrogen (N) deficiency inhibiting plant shoot growth may be related with its impacts on root hydraulic resistance. Hence, effects of N deficiency on root radial and axial hydraulic resistances of maize were studied in this study with potometer and anatomical methods, respectively. The results indicated that N deficiency increased root radial hydraulic resistance of the apical zone under both high and low transpiration and axial hydraulic resistance more than 6 cm from the root tip. Root radial hydraulic resistance of N deficiency treatment was insensitive to aquaporin inhibitor mercuric chloride (HgCl2), but radial hydraulic resistance of normal N use treatment was sensitive to HgCl2 under low photosynthetic photo flux density (PPFD). This suggested that the decrease of water transport across Hg-sensitive transcellular pathway might be an important reason for the increase of radial hydraulic resistance on low N availability roots under a low hydrostatic gradient. The increase of axial hydraulic resistance more than 6 cm from the root tip under N deficiency was closely related with the decreased number and the smaller diameters of mature metaxylems. |
| 出处 | Journal of Plant Nutrition |
| 卷 | 26 |
| 期 | 4 |
| 页 | 821-834 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0190-4167 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23576]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Li Y. Y.,Shao M. G.. Responses of radial and axial hydraulic resistances in maize root to nitrogen availability. 2003. |
入库方式： OAI收割
来源：地理科学与资源研究所
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