HB-2 — Cucumis melo

Summary

MELO3C007809.2 (symbol HB-2, also known as CmHB-2) on melon chromosome 9 encodes a homeodomain-leucine zipper (HD-Zip) class I transcription factor with DNA-binding and protein homodimerization activity, localized to the nucleus. This gene is associated with the regulation of gibberellin biosynthetic processes, chlorophyll breakdown, leaf senescence, sex determination, stamen and flower development, seed maturation, root development, and responses to hormones including auxin and abscisic acid, as well as to abiotic stresses such as salinity and drought. It has been linked to fruit shape, flowering time, leaf senescence, transpiration rate, stomatal closure, root thickness, and tuber size. Studies of related genes in other species connect the family to shoot branching, gravitropism, seed longevity, drought and salt stress tolerance, and ABA signaling.