AMAP, Université de Montpellier, CIRAD, CNRS, INRAE, IRD, 34000, Montpellier, France.
SILVA, INRAE, Université de Lorraine, Agroparistech, Centre de Recherche Grand-Est Nancy, 54280, Champenoux, France.
BMC Res Notes. 2022 Jul 15;15(1):251. doi: 10.1186/s13104-022-06136-7.
Carbon fixed during photosynthesis is exported from leaves towards sink organs as non-structural carbohydrates (NSC), that are a key energy source for metabolic processes in trees. In xylem, NSC are mostly stored as soluble sugars and starch in radial and axial parenchyma. The multi-functional nature of xylem means that cells possess several functions, including water transport, storage and mechanical support. Little is known about how NSC impacts xylem multi-functionality, nor how NSC vary among species and climates. We collected leaves, stem and root xylem from tree species growing in three climates and estimated NSC in each organ. We also measured xylem traits linked to hydraulic and mechanical functioning.
The paper describes functional traits in leaves, stems and roots, including NSC, carbon, nitrogen, specific leaf area, stem and root wood density and xylem traits. Data are provided for up to 90 angiosperm species from temperate, Mediterranean and tropical climates. These data are useful for understanding the trade-offs in resource allocation from a whole-plant perspective, and to better quantify xylem structure and function related to water transportation, mechanical support and storage. Data will also give researchers keys to understanding the ability of trees to adjust to a changing climate.
光合作用过程中固定的碳作为非结构性碳水化合物（NSC）从叶片输出到汇器官，NSC 是树木代谢过程的主要能量来源。在木质部中，NSC 主要以径向和轴向薄壁组织中的可溶性糖和淀粉形式储存。木质部的多功能性意味着细胞具有多种功能，包括水分运输、储存和机械支撑。目前尚不清楚 NSC 如何影响木质部的多功能性，也不清楚 NSC 在不同物种和气候条件下如何变化。我们从生长在三种气候条件下的树种中采集了叶片、茎和根木质部，并估计了每个器官中的 NSC。我们还测量了与水力和机械功能相关的木质部特征。
本文描述了叶片、茎和根中的功能特性，包括 NSC、碳、氮、比叶面积、茎和根的木材密度以及木质部特性。数据提供了来自温带、地中海和热带气候的多达 90 种被子植物物种的信息。这些数据有助于从整个植物的角度理解资源分配的权衡，更好地量化与水分运输、机械支撑和储存相关的木质部结构和功能。数据还将为研究人员提供理解树木适应气候变化能力的关键。
