INVESTIGADORES
DELGADO Luciana
artículos
Título:
Genetic control of floral size and proportions
Autor/es:
JULIA WEISS; LUCIANA DELGADO-BENARROCH; MARCOS EGEA-CORTINES
Revista:
INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY
Editorial:
UNVERSIDAD DEL PAÍS VASCO
Referencias:
Año: 2005 vol. 49 p. 513 - 525
ISSN:
0214-6282
Resumen:
Floral size is an ecologically important trait related to pollination success and genetic
fitness. Independently of the sexual reproduction strategy, in many plants, floral size seems to be
controlled by several genetic programs that are to some extent independent of vegetative growth.
Flower size seems to be governed by at least two independent mechanisms, one controlling floral
architecture that affects organ number and a second one controlling floral organ size. Different
organ-dependent growth control may account for the final proportions of a flower as a whole. Genes
controlling floral organ identity, floral symmetry and organ polarity as well as auxin and gibberellin
response, also play a role in establishing the final size and architecture of the flower. The final size
of an organ seems to be controlled by a systemic signal that might in some cases overcome
transgenic modifications of cell division and expansion. Nevertheless, modification of basic
processes like cell wall deposition might produce important changes in the floral organs. The
coordination of the direction of cell division and expansion by unknown mechanisms poses a
challenge for future research.