Premature arrest of the male flower meristem precedes sexual dimorphism in the dioecious plant Silene latifolia.

Détails

ID Serval
serval:BIB_32CEEB8119AA
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Premature arrest of the male flower meristem precedes sexual dimorphism in the dioecious plant Silene latifolia.
Périodique
Proceedings of the National Academy of Sciences of the United States of America
Auteur(s)
Zluvova J., Nicolas M., Berger A., Negrutiu I., Monéger F.
ISSN
0027-8424 (Print)
ISSN-L
0027-8424
Statut éditorial
Publié
Date de publication
12/2006
Peer-reviewed
Oui
Volume
103
Numéro
49
Pages
18854-18859
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Most dioecious plant species are believed to derive from hermaphrodite ancestors. The regulatory pathways that have been modified during evolution of the hermaphrodite ancestors and led to the emergence of dioecious species still remain unknown. Silene latifolia is a dioecious plant species harboring XY sex chromosomes. To identify the molecular mechanisms involved in female organ suppression in male flowers of S. latifolia, we looked for genes potentially involved in the establishment of floral organ and whorl boundaries. We identified homologs of Arabidopsis thaliana SHOOTMERISTEMLESS (STM) and CUP SHAPED COTYLEDON (CUC) 1 and CUC2 genes in S. latifolia. Our phylogenetic analyses suggest that we identified true orthologs for both types of genes. Detailed expression analyses showed a conserved expression pattern for these genes between S. latifolia and A. thaliana, suggesting a conserved function of the corresponding proteins. Comparative in situ hybridization experiments between male, female, and hermaphrodite individuals reveal that these genes show a male-specific pattern of expression before any morphological difference become apparent. Our results make SlSTM and SlCUC strong candidates for being involved in sex determination in S. latifolia.
Mots-clé
Flowers/growth & development, Flowers/physiology, Meristem/growth & development, Meristem/physiology, Molecular Sequence Data, Sex Characteristics, Sex Determination Processes, Silene/genetics, Silene/growth & development, Time Factors
Pubmed
Web of science
Open Access
Oui
Création de la notice
19/11/2007 11:03
Dernière modification de la notice
20/08/2019 14:18
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