Figure 1

Phylogenetic tree of NIP III subgroup genes in plants. The tree was reconstructed using the Minimum Evolution (ME) method implemented in MEGA 4.0. The number beside the branches represents bootstrap values ≥60% based on 1000 resamplings. Branches with rates of numbers of nonsynonymous and synonymous substitutions >1, are indicated by red thick lines. To identify the species of origin for each NIP2 gene, a species acronym is included before the gene name: Bd, Brachypodium distachyon; Ca, Cicer arietinum; Cp, Cucurbita pepo; Cpa, Carica papaya; Cs, Cucumis sativus; Gm, Glycine max; Hv, Hordeum vulgare; Le, Lycopersicon esculentum; Me, Manihot esculenta; Mg, Mimulus guttatus; Mt, Medicago truncatula; Os, Oryza sativa; Pit, Pinus taeda; Ppa, Prunus persica; Ps, Picea sitchensis; Pt, Populus trichocarpa; Pv, Panicum virgatum; Rc, Ricinus communis; Sb, Sorghum bicolor; Sm, Selaginella moellendorffii; So, Saccharum officinarum; Ta, Triticum aestivum; Vv, Vitis vinifera; Zm, Zea mays; Zo, Zingiber officinale.