Plant hydraulics coordinated with photosynthetic traits and climate
Plant hydraulics coordinated with photosynthetic traits and climate
Abstract The coupling between water loss and carbon dioxide uptake drives the coordination of plant hydraulic and photosynthetic traits. Analysing multi-species measurements on a 3000 m elevation gradient, we found that hydraulic and leaf-economic traits were less plastic, and more closely associated with phylogeny, than photosynthetic traits. The two trait sets are linked by the sapwood-to-leaf area ratio (Huber value, vH), shown here to be codetermined by sapwood hydraulic conductance (KS), leaf mass-per-area (LMA) and photosynthetic capacity (Vcmax). Substantial hydraulic diversity was related to the trade-off between KS and vH. Leaf drought tolerance (inferred from turgor loss point, –πtlp) increased with wood density, but the trade-off between hydraulic efficiency (KS) and –πtlp was weak. The least-cost optimality framework was extended to predict trait (KS-dominated) and environmental (temperature-dominated) effects on vH. These results suggest an approach to include photosynthetic-hydraulic coordination in land-surface models; however, prediction of non-plastic trait distributions remains a challenge.
Wright Ian J.、Harrison Sandy P.、Xu Huiying、Wang Han、Prentice I. Colin
Department of Biological Sciences, Macquarie UniversityMinistry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University||School of Archaeology, Geography and Environmental Sciences (SAGES), University of ReadingMinistry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University||Joint Center for Global Change Studies (JCGCS)Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University||Joint Center for Global Change Studies (JCGCS)Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University||Department of Life Sciences, Imperial College London||Department of Biological Sciences, Macquarie University
植物学环境科学基础理论环境生物学
Wright Ian J.,Harrison Sandy P.,Xu Huiying,Wang Han,Prentice I. Colin.Plant hydraulics coordinated with photosynthetic traits and climate[EB/OL].(2025-03-28)[2025-08-02].https://www.biorxiv.org/content/10.1101/2021.03.02.433324.点此复制
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