Figure 1. Phylogenetic tree of soybean, Arabidopsis, rice and Medicago plant Pi transporter proteins in Pht1 family.

Transporters and corresponding plant species are as follows: rice (Oryza sativa), OsPT1 through OsPT13 [16]; Arabidopsis (Arabidopsis thaliana), AtPht1;1 through AtPht1;9 [14]; Medicago (Medicago truncatula) MtPT1 through MtPT6 [68] and other four PT proteins obtained in Phytozome (http://www.phytozome.net/medicago), soybean (Glycine Max), GmPT1 through GmPT14 (this work).