Regulatory mechanisms underlying oil palm mesocarp maturation and functional specialization in lipid and carotenoid metabolism

Dussert Stéphane, Tranbarger Timothy John, Joët Thierry, Morcillo Fabienne. 2012. Regulatory mechanisms underlying oil palm mesocarp maturation and functional specialization in lipid and carotenoid metabolism. In : 20th International Symposium on Plant Lipids (ISPL 2012), 8-13 July, 2012, Seville, Spain. s.l. : s.n., Résumé, 1 p. International Symposium on Plant Lipids. 20, Séville, Espagne, 8 Juillet 2012/13 Juillet 2012.

Matériel d'accompagnement : 1 poster

Résumé : The lipid-rich fleshy mesocarp tissue of the oil palm (Elaeis guineensis) fruit is not only the main source of edible oil for the world, but it is also the richest dietary source of provitamin A. This study examines the transcriptional basis of these two outstanding metabolic characters in the oil palm mesocarp. Morphological, cellular, biochemical, and hormonal features defined key phases of mesocarp development. A 454 pyrosequencing derived transcriptome was then assembled for the developmental phases preceding and during maturation, when high rates of lipid and carotenoid biosynthesis occur. A total of 2,629 contigs with differential representation revealed coordination of metabolic and regulatory components. Further analysis focused on the fatty acid and triacylglycerol assembly pathways and during carotenogenesis. Notably, a contig similar to the Arabidopsis (Arabidopsis thaliana) seed oil transcription factor WRINKLED1 was identified with a transcript profile coordinated with those of several fatty acid biosynthetic genes and the high rates of lipid accumulation, suggesting some common regulatory features between seeds and fruits.

Classification Agris : F60 - Physiologie et biochimie végétale
F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Dussert Stéphane, IRD (FRA)
• Tranbarger Timothy John, IRD (FRA)
• Joët Thierry, IRD (FRA)
• Morcillo Fabienne, CIRAD-BIOS-UMR DIADE (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/568132/)

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