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Fig. 2 Plant height is aligned with hydraulic traits.
Plant height is aligned with hydraulic traits. Relationships between maximum plant height (inset: actual measured plant height) and (A) sapwood-specific hydraulic conductivity (Ks), (B) the xylem tension at 50% loss of the maximum hydraulic conductivity (P50), (C) trade-off between Ks and P50, (D) leaf-to-sapwood area ratio (AL/AS), (E) the product of AL/AS and Ks (Darcy’s law), (F) mean tangential vessel or tracheid diameter (Vdia), (G) number of vessels or tracheids per square millimeter (VD), and (H) sapwood density (WD) across species. Scaling slopes in (E) for angiosperms (0.69 and 0.66 based on Hmax and Hact, respectively) and gymnosperms (0.75 and 0.52 based on Hmax and Hact, respectively) are all significantly less than 1 (P < 0.001). Different colors indicate biome types (see Table 1), and symbols for angiosperms (circles, solid lines) and gymnosperms (crosses, dashed lines) are scaled to AI values in (A and B) and (D to H), but to Hmax values in (C). Model parameters are reported in tables S3 to S6. Hui Liu et al. Sci Adv 2019;5:eaav1332 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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