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

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 defin...

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Veröffentlicht in:Scientific reports 2019-02, Vol.9 (1), p.1478-1478, Article 1478
Hauptverfasser: Ortuño-Miquel, Samanta, Rodríguez-Cazorla, Encarnación, Zavala-Gonzalez, Ernesto A., Martínez-Laborda, Antonio, Vera, Antonio
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Sprache:eng
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Zusammenfassung: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 determined that hen4 , partly due to loss of FLC , accelerates the vegetative phase-change. This report provides insight into flowering time control and highlights the potential of versatile regulators such as HEN4 to coordinate the juvenile-to-adult transition and floral timing.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-38327-3