Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12870-014-0265-8/MediaObjects/12870_2014_Article_265_Fig1_HTML.jpg)
Phylogenetic analyses of UGPases from Populus and other species. Analysis was conducted in MEGA4 program using the Neighbor-Joining method. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (500 replicates) are shown next to the branches. UGPases from this study are in bold. AtUGPase1 (Arabidopsis thaliana): AT3G03250; AtUGPase2: AT5G17310.2; AxUGPase (Acetobacter xylinum):AAA21888.1; EgUGPase (Eucalyptus grandis): ACF04278.1; OsUGPase1 (Oryza sativa): ABD57308; OsUGPase2: AF249880; PtrUGP1 (Populus trichocarpa): Potri.004G074400; PtrUGP2, Potri.017G144700; RcUGPase (Ricinus communis): XP_002526594.1; StUGPase (Solanum tuberosum): AAL99197.1; ZmUGPase (Zea mays): NP_001130742.1.