Figure 2.

Phylogenetic analysis of APX, GPX, CAT and SOD proteins. The phylogenetic tree for each gene family was constructed by the Neighbor-joining method implemented in MEGA7 with 500 bootstraps using orthologs from Arabidopsis thaliana. (A) APX proteins were divided into five clades, (B) GPX proteins were divided into five clades, (C) CAT proteins were divide into three clades, and (D) SOD proteins were divided into five clades. Different clades of trees are shown in different colors: I, blue; II, pink; III, green; IV, purple, and V, red. Bootstrap values of ≥ 50 are indicated.