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. 2014 Mar 3;65(13):3725–3736. doi: 10.1093/jxb/eru052

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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. 5. — ATP cost of gross assimilation, representing C₄ biochemical operating efficiency for HL plants (A), LL plants (B), and HLLL plants (C). The empirical values for J _ATP/GA (empty symbols) were compared to predicted values for ATP/GA (solid symbols) calculated with two different approaches. ATP/GA was calculated using ϕ as the sole proxy for operating efficiency (ϕ approach; solid squares) or using a comprehensive calculation summing the ATP cost of all processes contributing to assimilation (B approach; solid circles). Note that both calculations were based on the same dataset, presented in Figs 1–3 and Table 2. Error bars represent one SE; n = 6 plants per condition.