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. 2014 Jul 19;65(18):5267–5278. doi: 10.1093/jxb/eru287

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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. 4. — Changes in (A, C, E, G, I) leaf CO₂ uptake rate (A _sat) and (B, D, F, H, J) stomatal conductance to water vapour (g _s) following transfer of plants from warm to chilling conditions. Values are expressed as a percentage of initial rates at time 0. (A and B) Accessions at different ploidy levels; (C and D) tetraploid M. sacchariflorus (Msa); (E and F) diploid Msa; (G and H) interspecific hybrids (F1) and their Msa parent (P1; high); (I and J) negative controls. Plants were grown at 25 °C/20 °C (warm) or 10 °C/5 °C (chilling) day/night, and a 14h day/10h night cycle under 1000 μmol photons m^–2 s^–1. Measurements were taken during the daytime. Data are the mean ±SE (n=4). Lower case letters indicate: ‘a’, non-significant differences; or ‘b’, significant differences in comparison with M. ×giganteus (3x) ‘Illinois’ (bold) on the 11th day after transfer to 10 °C/5 °C based on Dunnett’s test (P≤0.05). Values for Mxg (3x) ‘Illinois’ on the 11th day of chilling treatment were: (A) 92.02%; (B) 68.18%. F1, the first generation of Msa×Msi hybrids; Msa, M. sacchariflorus; Msi, M. sinensis; Mxg, M. ×giganteus; P1 (high), parent 1 of interspecific Msa×Msi hybrids (Msa with high chilling tolerance).