Fig. 1

Phylogenetic classification of HD-ZIP gene in Eucalyptus grandis, Arabidopsis thaliana and Oryza sativa. The phylogenetic tree was constructed using iQTREE software. The topological structure of the ML tree shows that the HD-Zip genes of Eucalyptus, Arabidopsis and rice can be divided into four subfamilies, namely EgHD-Zip I, EgHD-Zip II, EgHD-Zip III, EgHD-Zip IV. In the figure, yellow represents the HD-Zip I subfamily of Arabidopsis, rice and Eucalyptus, blue represents the HD-Zip II subfamily of Arabidopsis, rice and Eucalyptus, and green represents the HD-Zip III subtype of Arabidopsis, rice and Eucalyptus. The orange represents the HD-ZipI IV subfamily of Arabidopsis, rice and Eucalyptus