Two gerbera homeobox HD-ZIP factor genes upregulated in disc flowers shared high sequence similarity with a xylem-specific Zinnia elegans gene [ 33] as well as with Arabidopsis REVOLUTA (REV) and CORONA (CNA) genes, both members of the HD-ZIP III gene family [ 34, 35].
DOI: http://dx.doi.org/10.7554/eLife.06857.002 Microphthalmia-associated transcription factor (MITF), a basic helix-loop-helix leucine zipper (bHLH-Zip) factor, regulates specification, survival, and proliferation of normal melanocytes, and controls proliferation, migration and invasion of melanoma cells (Goding, 2000; Widlund and Fisher, 2003; Steingrimsson et al., 2004).
Here we investigate the role of a Class III HD ZIP transcription factor, POPCORONA, during secondary growth of woody stems.
In addition to these sequences, putative orthologues of class III HD ZIP transcription factor family were identified from the Malus EST database and named MdPHV, MdREV, MdHB8, and MdHB15.
One good example is Oshox1, encoding a homeo-domain leucine zipper (HD-Zip) transcription factor that plays an important role in vascular differentiation.
The Vrs1 (HvHox1) gene encodes a homeodomain-leucine zipper (HD-Zip) transcription factor.
START domain-containing proteins are abundant in the plant kingdom, where the majority are members of a plant-specific homeodomain leucine zipper (HD-Zip) transcription factor family [ 7].
The homeodomain leucine zipper (HD-Zip) transcription factor family is one of the largest plant specific superfamilies, and includes genes with roles in modulation of plant growth and response to environmental stresses.
Genetic analysis, sequence alignment and allelic variation survey in natural populations identified Csa6G514870 encoding a class IV homeodomain-associated leucine zipper (HD-ZIP) transcription factor as the only candidate for CsGL3, which was 5188 bp in length with 10 predicted exons.
Outer Cell Layer 4 (OCL4), a maize HD-ZIP transcription factor, has been suggested to involve in the repression of macrohair differentiation (Vernoud, et al. 2009), and a HD-Zip protein in tomato, Woolly (Wo) that interacts with Cyclin B2, plays an essential role for trichome formation and embryonic development (Yang et al. 2011).
Class III HD ZIP transcription factors are evolutionarily ancient and play fundamental roles in various aspects of plant development.
