Regulation of the EgDEF1 gene in the mantled homeotic variant of oil palm

Debladis Emilie, Hooi Wei Yeng, Richaud Frédérique, Beulé Thierry, Collin Myriam, Sabot François, Garsmeur Olivier, D'Hont Angélique, Rival Alain, Jaligot Estelle. 2013. Regulation of the EgDEF1 gene in the mantled homeotic variant of oil palm. . Presqu'île de Giens : ENS, Résumé, 1 p. Workshop on Molecular Mechanisms Controlling Flower Development, Presqu'île de Giens, France, 8 June 2013/12 June 2013.

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Abstract : The mantled variation of oil palm (Elaeis guineensis) involves a significant deficit in genome-wide methylation as well as the mis-expression of a variety of genes affecting both the in vitro-propagated material from which the palms originate and the adult regenerants (for a review see [1]). This reversible floral phenotype is morphologically similar to B-class MADS-box mutants: indeed, the abnormal flower displays an homeotic conversion of male floral organs into female ones [2]. In order to investigate the role of epigenetic processes in the transcriptional regulation of EgDEF1, the ortholog of APETALA3/DEFICIENS in the oil palm genome, we have studied the DNA methylation pattern of this gene concomitantly with its transcript production in the developing inflorescence. The exploration of the genomic region surrounding the gene led to the isolation of several retroelements which were also examined. Although our results do not point to a direct implication of DNA methylation in the regulation of the EgDEF1 gene, they raise exciting new questions about the possible mechanisms underlying the variant phenotype. (Texte intégral)

Classification Agris : F30 - Plant genetics and breeding
F60 - Plant physiology and biochemistry
F63 - Plant physiology - Reproduction
F02 - Plant propagation

Auteurs et affiliations

  • Debladis Emilie, IRD (FRA)
  • Richaud Frédérique, CIRAD-BIOS-UMR DIADE (FRA)
  • Beulé Thierry, CIRAD-BIOS-UMR DIADE (FRA)
  • Collin Myriam, IRD (FRA)
  • Sabot François, IRD (FRA)
  • Garsmeur Olivier, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8869-3689
  • D'Hont Angélique, CIRAD-BIOS-UMR AGAP (FRA)
  • Rival Alain, CIRAD-BIOS-UMR DIADE (FRA) ORCID: 0000-0001-6304-3268
  • Jaligot Estelle, CIRAD-BIOS-UMR DIADE (FRA) ORCID: 0000-0002-9252-5271

Source : Cirad-Agritrop (

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