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. 2014 Mar 17;6:plu010. doi: 10.1093/aobpla/plu010

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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/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 5. — Stem:leaves ratios (St/L) of tobacco plants grown in 15-L sand culture under ambient (360 ppm) and elevated (700 ppm) CO₂ concentration at different plant ages (means of n = 5 and standard deviation). Asterisks as in Fig. 2.