Fig. 1

Unrooted phylogenetic tree showing relationships between the bZIP domains of Nicotiana tabacum L.and Arabidopsis thaliana. The phylogenetic tree was derived using the neighbour-joining method in MEGA X. The tree shows the 11 phylogenetic subfamilies (red). bZIP proteins from Arabidopsis are indicated by the prefix ‘At’. bZIP: basic leucine zipper; MEGA: Molecular Evolutionary Genetics Analysis