AGL2 — Daucus carota subsp. sativus

Summary

DcAGL2 (AGL2) on carrot chromosome 7 encodes a MADS-box transcription factor with a K-box domain, annotated with transcription regulator, DNA-binding, and coactivator/corepressor activities. It is associated with the maintenance of floral organ identity, regulation of double fertilization, negative regulation of seed maturation and floral organ abscission, fruit abscission, regulation of proanthocyanidin anabolism, abscisic acid breakdown, and cellular water homeostasis. The gene is linked to numerous floral and seed traits, including carpel, sepal, petal, and stamen morphology, floral organ size and length, seed coat hardness and color, endosperm morphology, fruit ripening, and cytoplasmic male sterility. Associations with carotenoid accumulation, ethylene biosynthesis, floral transition, and seed coat development have also been observed. Studies of related genes in other species connect the family to floral meristem identity, fruit ripening, and drought tolerance.