SPCH — Daucus carota subsp. sativus

Summary

DCAR_020305 (DcSPCH) on carrot chromosome 6 encodes a basic helix-loop-helix (bHLH) transcription factor belonging to the FAMA/SPEECHLESS/MUTE family, with core promoter sequence-specific DNA binding and transcription activator activity. It is associated with stomatal lineage progression, guard mother cell differentiation, stomatal complex development, and regulation of stomatal complex development. The gene is linked to responses to osmotic stress, cold, freezing, and low humidity, as well as abscisic acid signaling and regulation of abscisic acid anabolism. Associations include seed morphogenesis, seed dormancy, endosperm development, germination rate, seedling growth and development, root length, flowering time, leaf senescence, pollen fertility, and disease tolerance. The protein localizes to both the nucleus and cytoplasm. Related genes in other species link the family to cold tolerance, freezing tolerance, stomatal differentiation, and seed germination.