TT8 — Asparagus officinalis

Summary

AoTT8 (TT8) on asparagus chromosome 3 encodes a basic helix-loop-helix (bHLH) transcription factor with DNA-binding and protein-dimerization activity. The gene is associated with the regulation of flavonoid, anthocyanin, and proanthocyanidin biosynthesis, as well as phenylpropanoid metabolism and sinapate ester downregulation. It has been linked to cell fate commitment, trichome differentiation, epidermal cell specification, seed coat mucilage production, and secondary cell wall biogenesis. Associations with agronomic traits include stem dry weight, seed weight, plant height, root length, anthocyanin and flavonoid content, photosynthetic rate, flowering time, and responses to UV light, oxidative stress, high and low temperature, cadmium, and biotic stress. The gene also shows connections to lignin biosynthesis, seed oil content, and disease resistance.