MYB3 — Solanum lycopersicum

Summary

SlMYB3 (SOLYC10G055410.2) encodes a Myb-domain transcription factor with DNA-binding, protein dimerization, and phosphatase activity. In tomato, it is associated with low-temperature tolerance, compound leaf morphogenesis, hair cell differentiation, and regulation of flavonol biosynthesis, as well as arabinose and tryptophan catabolism. The gene has been linked to numerous agronomic traits including fruit size, plant height, leaf trichome density, anthocyanin and flavonoid content, starch and glucose levels, brassinosteroid and jasmonic acid content, flower abortion, petal size, submergence tolerance, UV-B sensitivity, and osmotic and biotic stress responses. It localizes to the nucleus, cytoplasm, and root hairs. Studies of related genes in other species connect the MYB3 family to phenylpropanoid and lignin biosynthesis, UV-B tolerance, disease resistance, and ABA and salt stress responses.