Arabidopsis HUA ENHANCER 4 delays flowering by upregulating the MADS-box repressor genes FLC and MAF4.

ABSTRACT: The adaptive success of flowering plants is largely due to their ability to align floral production with optimal conditions. In Arabidopsis thaliana, MADS-box repressors of the FLC/MAF-clade prevent flowering under non-inductive conditions, although the role of some members is not yet clearly defined. Using a genetic strategy, we identified the KH-domain gene HEN4, previously shown to be involved in MADS-box floral homeotic gene regulation, as a modulator of flowering time. Loss-of-function hen4 mutants are early-flowering, and their response to low growth-temperature (16 °C) and day-length is altered. Interestingly, hen4 plants showed dramatic reduction of FLC and MAF4 transcripts, whereas other flowering repressors of the same clade (FLM, MAF2, MAF3, MAF5) remained unaltered. We also det

SUBMITTER: Ortuno-Miquel S 

PROVIDER: S-EPMC6365585 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature