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Figure 1 | BMC Plant Biology

Figure 1

From: Uncharacterized conserved motifs outside the HD-Zip domain in HD-Zip subfamily I transcription factors; a potential source of functional diversity

Figure 1

Phylogenetic trees of HD-Zip I transcription factors. Maximum Likelihood phylogenetic trees were constructed using the amino acid sequences of 178 HD-Zip subfamily I transcription factors from different plant species including monocots, dicots, mosses, ferns and conifers. The HZT was constructed with the sequences of the HD and HALZ domains and is the reference tree. The CST was calculated with the complete sequences. Clades highlighted with different colours represent groups of transcription factors sharing common motifs in their CTRs. These clades are numbered from I to VI whereas group I is divided in three subgroups named Ia, Ib and Ic. Inside these groups, clades exclusively formed by monocots or dicots transcription factors were labelled with an M or a D, respectively; and their structure was collapsed to ease visualization. Proteins shared between groups in the HZT and CST have been erased from the CST. Unshared members have been marked with an asterisk in the HZT. The group labelled Pp includes all the proteins from the moss Physcomitrella patens. Bootstrap support values, as percentages, are indicated in the nodes. Branches with low bootstrap values (below 50%) have been collapsed, with the exception of the basal branches of groups Ic, III and IV in the HZT which have further support from bootstrap values in the CST (see Table 1) and conserved motifs in the NTRs and CTRs (Figures 2, 4 and Additional file 8).

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