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. 2020 Apr 24;11:374. doi: 10.3389/fpls.2020.00374

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Copyright © 2020 Ye, Ling, Yu, Duan, Kang, Huang, Duan, Chen, Liu and Zhou.

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) and the copyright owner(s) 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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Irradiance (I) responses of net photosynthetic rate (A_n) (A,B), stomatal conductance (g_s) (C,D) and transpiration rate (T_r) (E,F) for C₃ [soybean (Glycine max)] and C₄ species [grain amaranth (Amaranthus hypochondriacus)], respectively. In plots (A) and (B), solid lines were fitted using Eq. 1 and dashed lines were fitted using the non-rectangular hyperbola model (Eq. S1). In plots (C) and (D), solid lines were fitted using Eq. 4. Data are the mean ± SE (n = 4).