title: Tomato (Solanum lycopersicum) homologs of TRIPTYCHON (SlTRY) and GLABRA3 (SlGL3) are involved in anthocyanin accumulation.
abstract: In Arabidopsis thaliana the CPC-like MYB transcription factors [CAPRICE (CPC), TRIPTYCHON (TRY), ENHANCER OF TRY AND CPC 1, 2, 3/CPC-LIKE MYB 3 (ETC1, ETC2, ETC3/CPL3), TRICHOMELESS 1, 2/CPC-LIKE MYB 4 (TCL1, TCL2/CPL4)] and the bHLH transcription factors [GLABRA3 (GL3) and ENHANCER OF GLABRA 3 (EGL3)] are central regulators of trichome initiation and root-hair differentiation. By transforming the tomato orthologous genes SlTRY (TRY) and SlGL3 (GL3) into Arabidopsis, we demonstrated that SlTRY inhibited trichome initiation and enhanced root-hair differentiation. These results suggest that tomato and Arabidopsis partially use similar transcription factors for epidermal cell differentiation, and that a CPC-like R3 MYB may be a key common regulator of plant trichome and root-hair development. CPC and GL3 are also known to be involved in anthocyanin biosynthesis. Here, we show that anthocyanin accumulation was repressed in the CPC::SlTRY and GL3::SlGL3 transgenic plants, suggesting that SlTRY and SlGL3 can influence anthocyanin pigment synthesis.
authors.affiliation: Interdisciplinary Research Organization; University of Miyazaki; Miyazaki, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Nukumizu
authors.forename: Takuji
authors.initials: T
authors.lastname: Wada
authors.forename: Rumi
authors.initials: R
authors.lastname: Tominaga-Wada
mesh_terms: D000872:Anthocyanins / Q000378:metabolism*; D017360:Arabidopsis; D018551:Solanum lycopersicum / Q000235:genetics / Q000378:metabolism*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified / Q000378:metabolism
chemical_list: D000872:Anthocyanins; D010940:Plant Proteins
keywords: Arabidopsis; CPC; R3 MYB; SlTRY; anthocyanin; tomato