*4.6. Gene Ontology Analysis*

For the gene ontology (GO) analysis, the *UGlcAE* gene family members in tomato and *Arabidopsis* were classified according to their each GO numbers from the SGN (available online: http:// solgenomics.net/) [37] and the TAIR (available online: http://www.arabidopsis.org/) [39]. After being normalized by the online service CapitalBio Molecule Annotation System (MAS) 3.0 (available online: http://bioinfo.capitalbio.com/mas3/) [49], their GO numbers were identified and visualized with BGI WEGO (available online: http://wego.genomics.org.cn/cgi-bin/wego/index.pl) [50].
