PI — Daucus carota subsp. sativus

Summary

DCAR_014369 (PI, DcPI) on carrot chromosome 4 encodes a protein with a K-box domain, possessing DNA-binding, transcription regulator, protein kinase, and histone kinase activities. It is associated with specification of petal identity, specification of stamen identity, maintenance of floral organ identity, maintenance of floral meristem identity, specification of floral organ identity, and megagametogenesis. The gene is linked to numerous flower morphology traits such as petal number, sepal and stamen morphology, floral organ size, and carpel shape, as well as to cytoplasmic male sterility, bacterial blight disease resistance, photoperiod-sensitive flowering time, seed longevity, leaf margin morphology, and photosynthetic rate. It localizes to the nucleus, cytoplasm, plastid, and plasmodesmata. Studies of related genes in other species link the family to petal and stamen formation, floral morphogenesis, and thermotolerance.