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. 2018 Feb 28;9:207. doi: 10.3389/fpls.2018.00207

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Copyright © 2018 Li, Li, Xuan, Jiang, Wei and Piao.

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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Phylogenetic tree of SWEETs from B. rapa, B. napus, and A. thaliana. The phylogenetic tree was built using the neighbor-joining (NJ) method. The unrooted tree was generated using ClustalW in MEGA5 via SWEETs amino acid sequences from A. thaliana (AtSWEET), B. rapa (BrSWEET), and B. napus (BnSWEET). The roman numerals (I – IV) labeled with various colors indicate different clades. The numbers at the nodes represent bootstrap percentage values based on 1000 replications. Genes from each species are marked with different bullet point colors.