Arabidopsis zinc finger homeodomain transcription factor BRASSINOSTEROID-RELATED HOMEOBOX 2 acts as a positive regulator of brassinosteroid response.

ABSTRACT: The brassinosteroid (BR) phytohormone is an important regulator of plant growth. To identify novel transcription factors that regulate BR responses, we screened chimeric repressor gene silencing technology (CRES-T) plants, in which transcription factors were converted into chimeric repressors by the fusion of SRDX plant-specific repression domain, with brassinazole (Brz), an inhibitor of BR biosynthesis. We identified that a line that expressed the chimeric repressor for zinc finger homeobox transcription factor, BRASSINOSTEORID-RELATED-HOMEOBOX-2 (BHB2-sx), exhibited Brz-hypersensitive phenotype with shorter hypocotyl under dark, dwarf and round and dark green leaves similar to BR-deficient phenotype. Similar to BHB2-sx plants, bhb2 knockout mutant also exhibit

SUBMITTER: Hasegawa R 

PROVIDER: S-EPMC9300435 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature