HB-2 — Cucumis melo

Summary

MELO3C032612.2 (symbol HB-2, also known as CmHB-2) on melon chromosome 8 encodes a homeodomain-leucine zipper (HD-Zip) class I transcription factor with DNA-binding, transcription factor activity, and protein homodimerization activity. It is localized to the nucleus. This gene is associated with the regulation of gibberellin biosynthesis, positive regulation of leaf senescence, upregulation of chlorophyll breakdown, sex determination, stamen and flower development, seed maturation, root development, and responses to abscisic acid, auxin, ethylene, salinity, and thirst. It has been linked to traits including fruit shape, flowering time, leaf senescence, root thickness, transpiration rate, stomatal closure time, osmotic response sensitivity, and abscisic acid sensitivity. Studies of related genes in other species connect this gene family to shade response, salt tolerance, tuberization, and root growth.