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. 2015 Feb 9;6:34. doi: 10.3389/fpls.2015.00034

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Copyright © 2015 Martín, Noarbe, Serrot and Sabater.

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) or licensor 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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Effect of CO₂ concentration on photosynthetic rate under fluctuating light. Assays were carried out with wt, ΔndhF, and pr-ΔndhF tobacco leaves and the figure shows representative graphics of 3–8 different series of experiments. After a 15 min acclimation at 130 μmol m^-2 s^-1 PAR, the leaf region entrapped in the climatic chamber was subjected to successive 6 min periods (starting at 0 time in the figure) of light intensities, abruptly changing according to the sequence 870, 61, 870, and 130 μmol m^-2 s^-1 PAR. The concentration of CO₂ varied for each sequence of light treatments as adjusted to (in ppm): 260 (-◯-), 312 (-▲-), 365 (-●-), 475 (-Δ-), and 625 (-▽-).