Photosynthetic assimilation rate <i>A</i> as a function of atmospheric CO₂ levels for C3 plants.

<p>The curves represent the results from the model of Katul et al. [11, 49] based on [48] (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067757#pone.0067757.e023" target="_blank">Eq. 12</a>) with <i>V_cmax</i>-<i>g_w</i> given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067757#pone.0067757.e026" target="_blank">Eq. 14b</a> (solid line) and <i>V_cmax</i>-<i>CO₂</i> given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067757#pone.0067757.e025" target="_blank">Eq. 14a</a> (dashed line). The symbols represent values resulting from the reconstruction of Franks and Beerling [15] (based on results corresponding to the “Upper bound L, variable Temp. and O₂” case in their <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067757#pone-0067757-g007" target="_blank">Fig. 7A</a>).