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. 2015 Oct 3;7:plv115. doi: 10.1093/aobpla/plv115

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Published by Oxford University Press on behalf of the Annals of Botany Company.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — Relationship between foliar nitrogen concentration (N_area) and parameters of physiological photosynthetic capacity (A_max, V_cmax and J_max) of Q. spinosa (upward triangles), S. atopantha (circles) and R. dentatus (squares) grown at high elevations of 2500 m (open symbols) and 3500 m (filled symbols) a.s.l. Quercus spinosa: (A) A_max versus N_area (regression R² = 0.285, F_1,45 = 3.195, P = 0.112); (D) V_cmax versus N_area (regression R² = 0.394, F_1,45 = 5.197, P = 0.0521) and (G) J_max versus N_area (regression R² = 0.310, F_1,45 = 3.589, P = 0.0948). Salix atopantha: (B) A_max versus N_area (regression R² = 0.633, F_1,45 = 17.216, P = 0.00198); (E) V_cmax versus N_area (regression R² = 0.604, F_1,45 = 15.260, P = 0.00293) and (H) J_max versus N_area (regression R² = 0.550, F_1,45 = 12.236, P = 0.00575). Rumex dentatus: (C) A_max versus N_area (regression R² = 0.919, F_1,45 = 113.380, P = 8.914 × 10⁻⁰⁷); (F) V_cmax versus N_area (regression R² = 0.639, F_1,45 = 17.7124, P = 0.00180) and (I) J_max versus N_area (regression R² = 0.596, F_1,45 = 14.733, P = 0.00327).