Hydraulic properties control plant responses to climate and are likely to be under strong selective pressure, but their macro‐evolutionary history remains poorly characterised. To fill this gap, we compiled a global dataset of hydraulic traits describing xylem conductivity (K_s), xylem resistance to embolism (P50), sapwood allocation relative to leaf area (Hv) and drought exposure (ψ_min), and matched it with global seed plant phylogenies. Individually, these traits present medium to high levels of phylogenetic signal, partly related to environmental selective pressures shaping lineage evolution. Most of these traits evolved independently of each other, being co‐selected by the same environmental pressures. However, the evolutionary correlations between P50 and ψ_min and between K_s and Hv show signs of deeper evolutionary integration because of functional, developmental or genetic constraints, conforming to evolutionary modules. We do not detect evolutionary integration between conductivity and resistance to embolism, rejecting a hardwired trade‐off for this pair of traits.

中文翻译：

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植物水力性状的适应与协调进化。

水力学特性控制着植物对气候的响应，并可能处于强大的选择压力下，但其宏观进化史却鲜为人知。为了填补这一空白，我们编译描述木质部电导率（液压性状的全局数据集ķ_小号），栓塞（P50）木质部阻力，相对于叶面积（HV）和干旱曝光（ψ边材分配_分钟），并用匹配的它全球种子植物系统发育。这些特征单独呈现中等到较高水平的系统发生信号，部分与塑造世系进化的环境选择性压力有关。这些特性中的大多数都是相互独立地进化的，它们是由相同的环境压力共同选择的。然而，P50和ψ之间的进化相关性由于功能，发育或遗传方面的限制，Ks和Hv之间的_min和K _s与Hv之间显示出更深的进化整合迹象，符合进化模块。我们没有检测到电导率和抗栓塞性之间的进化整合，因此拒绝了这对特性的硬性折衷。