Fig. 3From: Comparative analysis of plant MKK gene family reveals novel expansion mechanism of the members and sheds new light on functional conservationPhylogenetic relationships between the 51 plant species investigated in this study. The total number of MAPKK proteins and that of each groups identified in each plant genome is indicated on the right. The phylogenetic tree is modified from Phytozome (http://www.phytozome.net/). Red and blue stars indicate whole-genome duplication and triplication, respectivelyBack to article page