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. 2013 Dec 5;4:496. doi: 10.3389/fpls.2013.00496

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Copyright © 2013 Hölttä, Kurppa and Nikinmaa.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The predictions for the absolute values for whole tree volume of xylem and phloem (A,B), hydraulic conductance of xylem and phloem (C,D), nitrogen content of xylem, phloem and leaves (E,F), and hydraulic conductance of xylem and phloem per leaf area (G,H) as a function of tree height. “sw = 2 cm” refers to a scenario where maximum sapwood depth was assumed to be 2 cm and the heartwood did not contain any nitrogen, “no hw” to a scenario of no heartwood formation, i.e., all of the xylem was assumed to be conducting, and “hw full N” a scenario where maximum sapwood depth was assumed to be 2 cm and the heartwood nitrogen content was the same as that of the sapwood.