Figure 1.

Phylogenetic relationships of the AUX/LAX auxin influx carriers from eight plant species. Protein sequences of 48 AUX/LAX auxin influx carriers from soybean, common bean, Medicago truncatula, Lotus japonicus, rice, maize, sorghum, and Arabidopsis (Supplementary Table S1) were used to construct the phylogenetic tree by the Maximum Likelihood method through MEGA 5.2 (Tamura et al., 2011). They were classified into five groups (I–V). The Arabidopsis AtGAT1 (AT1G08230.2), an H⁺-driven, high affinity gamma-aminobutyric acid transporter, was used as outgroup. The soybean GmLAXs were shown in bold font.