Phylogenetic analysis of VvABF2. The phylogenetic tree represents VvABF2 (black circle) and its orthologs (boldface) from the A subgroup of bZIP transcription factors in Arabidopsis (AT) and grape (VIT). The closest ortholog of VvABF2 from tomato (SlAREB1; Bastías et al., 2011) and representative Arabidopsis bZIP transcription factors from other bZIP subgroups (subgroup G, AtGBF2; H, AtHY5; I, AtbZIP29; E, AtbZIP34; D, AtTGA3; S, AtATB2; B, bZIP28; and C, AtBZO2H2) are also reported according to Jakoby et al. (2002) and Corrêa et al. (2008). The gene identifiers as well as synonyms (published names) are given. Multiple sequence alignments were generated using Clustal Omega (Sievers et al., 2011) on full-length proteins as implemented by MEGA software, version 5.0 (Tamura et al., 2011). The phylogenetic tree was constructed by neighbor joining with complete deletions as implemented by MEGA. Reliability values at each branch represent bootstrap samples (2,000 replicates).