Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area

doi:10.1016/j.plaphy.2023.107681

KIB OpenIR

	Within-branch photosynthetic gradients are more related to the coordinated investments of nitrogen and water than leaf mass per area
	Wang,Xiao-Qian; Sun,Hu; Zeng,Zhi-Lan; Huang,Wei
	2023
发表期刊	PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN	1873-2690
卷号	198 页码:107681
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.
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
学科领域	Plant Sciences
DOI	10.1016/j.plaphy.2023.107681
收录类别	SCI
WOS记录号	WOS:000981749700001
引用统计
文献类型	期刊论文
条目标识符	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.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
1-s2.0-S098194282300（4620KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载