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. 2014 Dec 29;66(5):1303–1315. doi: 10.1093/jxb/eru481

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© The Author 2014. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 8. — The influence of variation in transpiration rate (E, mmol m^–2 s^–1) on (A) leaf water potential and (B) the difference between stem and leaf water potential (ΔΨ_stem–leaf, MPa) for: H. annus plants grown under ~190 (filled circles), 450 (open circles), and 1030 ppm CO₂ (grey circles). The crosses in A represent the predicted leaf water potentials for a leaf that possesses the average static leaf hydraulic conductance (i.e. k _leaf(0)=9.08 mmol m^–2 s^–1 MPa^–1) across all three CO₂ treatments. The solid black line in panel (B) represents the best-fit model describing the coordination between ΔΨ_stem–leaf and E.