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Fruit-dependent epigenetic regulation of flowering in Citrus

Agustí, M.; Mesejo, C.; Muñoz-Fambuena, N.; Vera-Sirera, F.; De Lucas, M.; Martínez-Fuentes, A.; Reig, C.; Iglesias, D.J.; Primo-Millo, E.; Blázquez, M.A.

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Authors

M. Agustí

C. Mesejo

N. Muñoz-Fambuena

F. Vera-Sirera

A. Martínez-Fuentes

C. Reig

D.J. Iglesias

E. Primo-Millo

M.A. Blázquez



Abstract

In many perennial plants, seasonal flowering is primarily controlled by environmental conditions, but in certain polycarpic plants, environmental signals are locally gated by the presence of developing fruits initiated in the previous season through an unknown mechanism. Polycarpy is defined as the ability of plants to undergo several rounds of reproduction during their life time, alternating vegetative and reproductive meristems in the same individual. To understand how fruits regulate flowering in polycarpic plants, we have focused on alternate bearing in Citrus trees that had been experimentally established as fully flowering or non flowering. We have found that the presence of the fruit causes epigenetic changes correlating with the induction of the CcMADS19 floral repressor, which prevents the activation of the floral promoter CiFT2 even in the presence of the floral inductive signals. In contrast, newly emerging shoots display an opposite epigenetic scenario associated with CcMADS19 repression, thereby allowing the activation of CiFT2 the following cold season.

Citation

Agustí, M., Mesejo, C., Muñoz-Fambuena, N., Vera-Sirera, F., De Lucas, M., Martínez-Fuentes, A., Reig, C., Iglesias, D., Primo-Millo, E., & Blázquez, M. (2020). Fruit-dependent epigenetic regulation of flowering in Citrus. New Phytologist, 225(1), 376-384. https://doi.org/10.1111/nph.16044

Journal Article Type Article
Acceptance Date Jun 26, 2019
Online Publication Date Jul 31, 2019
Publication Date Jan 31, 2020
Deposit Date Jul 5, 2019
Publicly Available Date Jul 8, 2019
Journal New Phytologist
Print ISSN 0028-646X
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 225
Issue 1
Pages 376-384
DOI https://doi.org/10.1111/nph.16044
Public URL https://durham-repository.worktribe.com/output/1298186

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Copyright Statement
This is the published version of the following article: Agustí, M. Mesejo, C. Muñoz-Fambuena, N., Vera-Sirera, F. De Lucas, M., Martínez-Fuentes, A. Reig, C., Iglesias, D.J. Primo-Millo, E. & Blázquez, M.A. (2019). Fruit-dependent epigenetic regulation of flowering in Citrus. New Phytologist 225(1): 376-384, which has been published in final form at https://doi.org/10.1111/nph.16044. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.





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