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. 2016 Jun 17;9:127. doi: 10.1186/s13068-016-0546-6

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Evolutionary tree of SWEET. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. This analysis involved 63 amino acid sequences (23 of Sorghum bicolor, 17 of Arabidopsis thaliana, 23 of Oryza sativa). Sorghum SWEET genes focused in this study are underlined by red and functionally validated Arabidopsis or rice SWEET genes are underlined by blue