Root hair formation at the root-hypocotyl junction in CPC-LIKE MYB double and triple mutants of Arabidopsis.
In Arabidopsis thaliana, R3-type MYB genes, CAPRICE (CPC) and its family of genes including TRIPTYCHON (TRY), ENHANCER OF TRY AND CPC1 (ETC1), ETC2 and CPC-LIKE MYB3 cooperatively regulate epidermal cell differentiation. Root hair formation is greatly reduced by a mutation in CPC, and try and etc1 enhance this phenotype. In this study, we demonstrate that CPC, TRY and ETC1 are also involved in root hair formation at the root-hypocotyl junction. The cpc try and cpc etc1 double mutants showed a reduced number of root hairs in that area. Additionally, the expression of ETC1::GUS was higher near this area. These results suggest that CPC family of genes also cooperatively regulates root hair formation at the root-hypocotyl junction in unique ways.
a Graduate School of Biosphere Sciences; Hiroshima University ; Higashi-Hiroshima, Japan.
Takuji
T
Wada
a Graduate School of Biosphere Sciences; Hiroshima University ; Higashi-Hiroshima, Japan.
Naoto
N
Hayashi
a Graduate School of Biosphere Sciences; Hiroshima University ; Higashi-Hiroshima, Japan.
Rumi
R
Tominaga-Wada
D017360:Arabidopsis / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000235:genetics*; D017343:Genes, Plant; D018546:Hypocotyl / Q000378:metabolism*; D009154:Mutation / Q000235:genetics*; D038081:Organogenesis; D018517:Plant Roots / Q000254:growth & development*; D011401:Promoter Regions, Genetic / Q000235:genetics
D029681:Arabidopsis Proteins
Arabidopsis; CAPRICE; MYB; root hair; root-hypocotyl junction