Fig. 2

Unrooted phylogenetic tree representing relationships among WRKY domains of pineapple and Arabidopsis. The different-colored arcs indicate different groups (or subgroups) of WRKY domains. Group I proteins with the suffix ‘N’ or ‘C’ indicates the N-terminal or the C-terminal WRKY domains. The black solid circles and hollow circles represent WRKY domain from pineapple and Arabidopsis, respectively. WRKY proteins from Arabidopsis with the prefix ‘At’ indicate ‘AtWRKY’