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The continuous flowering gene in rose is a floral inhibitor

Abstract :

In rose, RoKSN, a TFL1 homologue, is a key regulator of continuous flowering. To study the function of this gene in planta, protocols of plant transformation are needed. We complemented tfl1 Arabidopsis mutants and ectopically expressed RoKSN in a continuous-flowering rose. In Arabidopsis, RoKSN complemented the tfl1 mutant by rescuing late flowering and indeterminate growth. In continuous-flowering rose, the ectopic expression of RoKSN led to the absence of flowering. In these transgenic roses, a study of genes implied in the floral regulation was carried out. The floral activator transcripts decreased whereas the FD transcription factor is up-regulated. We conclude that RoKSN is a floral repressor and could regulate the expression of transcripts as RoFT and RoFD.
These results could strengthen a mechanism of competitive interactions of RoFT and RoKSN with a common partner, FD to move towards flowering or vegetative developments.

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https://hal.univ-angers.fr/hal-02516453
Contributeur : Okina Université d'Angers <>
Soumis le : lundi 23 mars 2020 - 21:36:16
Dernière modification le : samedi 15 août 2020 - 03:09:43

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  • HAL Id : hal-02516453, version 1
  • OKINA : ua12172

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Citation

Laurence Hibrand-Saint Oyant, M. Randoux, Julien Jeauffre, Tatiana Thouroude, Sandrine Pierre, et al.. The continuous flowering gene in rose is a floral inhibitor. VI International Symposium on Rose Research and Cultivation, 2015, Hanovre, Germany. pp.107-113. ⟨hal-02516453⟩

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