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. 2018 Jun 1;9:693. doi: 10.3389/fpls.2018.00693

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Copyright © 2018 Stewart, Polutchko, Demmig-Adams and Adams.

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) and the copyright owner 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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The (A) light- and CO₂-saturated rate of photosynthetic oxygen evolution (photosynthetic capacity), (B) product of the number of phloem cells per minor vein and vein density, (C) product of the number of sieve elements per minor vein and vein density, and (D) product of the number of companion cells (CCs) plus phloem parenchyma cells (PCs) per minor vein and vein density in leaves of the Col-0 (violet columns) and low-vein-density Ei-5 (indigo columns) accessions of A. thaliana grown under a 9-h photoperiod of 1000 μmol photons m^-2 s^-1 at a leaf temperature of 20°C. Mean values ± standard deviations for (A) and ± standard errors for (B–D); n = 4. There was no significant difference (n.s.) between any of the mean values.