Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area
文献类型：期刊论文
| 作者 | Wang,Xiao-Qian; Sun,Hu; Zeng,Zhi-Lan; Huang,Wei
|
| 刊名 | PLANT PHYSIOLOGY AND BIOCHEMISTRY
 |
| 出版日期 | 2023 |
| 卷号 | 198页码:107681 |
| 关键词 | Photosynthesis Leaf nitrogen content Stomatal conductance Mesophyll conductance Photosynthetic nitrogen use efficiency Leaf mass per area MESOPHYLL DIFFUSION CONDUCTANCE CO2 ASSIMILATION ANATOMICAL CHARACTERISTICS TEMPERATURE-DEPENDENCE STOMATAL CONDUCTANCE LIGHT-ACCLIMATION GAS-EXCHANGE SHADE LEAVES DRY MASS CAPACITY |
| ISSN号 | 1873-2690 |
| DOI | 10.1016/j.plaphy.2023.107681 |
| 英文摘要 | Nitrogen (N) and water are key resources for leaf photosynthesis and the growth of whole plants. Within-branch leaves need different amounts of N and water to support their differing photosynthetic capacities according to light exposure. To test this scheme, we measured the within-branch investments of N and water and their effects on photosynthetic traits in two deciduous tree species Paulownia tomentosa and Broussonetia papyrifera. We found that leaf photosynthetic capacity gradually increased from branch bottom to top (i.e. from shade to sun leaves). Concomitantly, stomatal conductance (gs) and leaf N content gradually increased, owing to the symport of water and inorganic mineral from root to leaf. Variation of leaf N content led to large gradients of mesophyll conductance, maximum velocity of Rubisco for carboxylation, maximum electron transport rate and leaf mass per area (LMA). Correlation analysis indicated that the within-branch difference in photosynthetic capacity was mainly related to gs and leaf N content, with a relatively minor contribution of LMA. Furthermore, the simul-taneous increases of gs and leaf N content enhanced photosynthetic N use efficiency (PNUE) but hardly affected water use efficiency. Therefore, within-branch adjustment of N and water investments is an important strategy used by plants to optimize the overall photosynthetic carbon gain and PNUE. |
| 学科主题 | Plant Sciences |
| WOS记录号 | WOS:000981749700001 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/75393]  |
| 专题 | 中国科学院昆明植物研究所 |
| 推荐引用方式 GB/T 7714 | Wang,Xiao-Qian,Sun,Hu,Zeng,Zhi-Lan,et al. Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2023,198:107681. |
| APA | Wang,Xiao-Qian,Sun,Hu,Zeng,Zhi-Lan,&Huang,Wei.(2023).Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area.PLANT PHYSIOLOGY AND BIOCHEMISTRY,198,107681. |
| MLA | Wang,Xiao-Qian,et al."Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area".PLANT PHYSIOLOGY AND BIOCHEMISTRY 198(2023):107681. |
入库方式： OAI收割
来源：昆明植物研究所
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