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. 2017 Oct 27;8:1855. doi: 10.3389/fpls.2017.01855

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Copyright © 2017 Li, Feng, Ma, Sui and Zhang.

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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Phylogenetic tree of cucumber (Cucumis sativus), Arabidopsis thaliana, and tomato (Solanum lycopersicum) SWEET proteins. AtSWEET is A. thaliana (yellow), CsSWEET is Cucumis sativus (red), and SlSWEET is Solanum lycopersicum (green). The evolutionary history was inferred using the neighbor joining method with 1,000 replicates. The evolutionary distances were computed using the Poisson correction distance model and are in the units of the number of amino acid substitutions per site. Evolutionary analyses were conducted using MEGA5.0 software. Accessions are listed in Supplementary Table S2.