¿Están implicadas las giberelinas en el proceso de la floración de los cítricos?
- C. Mesejo 1
- N. Muñoz-Fambuena 1
- A. Martínez-Fuentes 1
- C. Reig 1
- D. J. Iglesias 2
- M.C. González-Mas 2
- E. Primo-Millo 2
- M. Agustí 1
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1
Universidad Politécnica de Valencia
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2
Instituto Valenciano de Investigaciones Agrarias
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Instituto Valenciano de Investigaciones Agrarias
Moncada i Reixac, España
- Ayuga Téllez, Francisco (coord.)
- Masaguer Rodríguez, Alberto (coord.)
- Mariscal Sancho, Ignacio (coord.)
- Villarroel Robinson, Morris (coord.)
- Ruiz-Altisent, Margarita (coord.)
- Riquelme Ballesteros, Fernando (coord.)
- Correa Hernando, Eva Cristina (coord.)
Editorial: Fundación General de la Universidad Politécnica de Madrid
ISBN: 84-695-9055-3, 978-84-695-9055-3
Any de publicació: 2014
Pàgines: 483-488
Congrés: Congreso Ibérico de Agroingeniería y Ciencias Hortícolas (7. 2013. Madrid)
Tipus: Aportació congrés
Resum
In citrus, fruit load reduces and even blocks flowering. This effect has been related to an increase of endogenous gibberellins (GAs) due to fruit during the floral bud inductive period (November-December). This hypothesis is supported by the effect of gibberellic acid inhibiting flowering when applied during the floral bud inductive period, but the role of endogenous GAs controlling citrus flowering has not ever been demonstrated. Molecular studies demonstrate that fruit inhibits flowering by repressing expression of genes CiFT, and CsAP1 and CsLFY, responsible for floral bud induction and differentiation, respectively, and increasing expression of genes CsTFL, TFL2 and FLC, responsible for floral bud inhibition, in leaves and buds. On the other hand, GAs-biosynthesis genes expression (i.e GA20ox1) in leaves and buds did not correlate to CiFT expression in fully loaded trees while it correlated to the ability to sprout. Results suggest that GAs may be indirectly related to the flowering process regulating bud sprouting.