A phenotypic test for delay of abscission and nonabscission oil palm fruit and validation by abscission marker gene expression analysis

Fooyontphanich Kim, Morcillo Fabienne, Amblard Philippe, Collin Myriam, Jantasuriyarat Chatchawan, Verdeil Jean-Luc, Tangphatsornruang Sithichoke, Tranbarger Timothy John. 2016. A phenotypic test for delay of abscission and nonabscission oil palm fruit and validation by abscission marker gene expression analysis. In : Proceedings of the International Symposium on Abscission Processes in Horticulture and Non-Destructive Assessment of Fruit Attributes : XXIX International Horticultural Congress on Horticulture : Sustaining lives, livelihoods and landscapes (IHC 2014). Tranbarger Timothy John (ed.), Wünsche Jens N. (ed.). ISHS. Louvain : ISHS, 97-104. (Acta Horticulturae, 1119) ISBN 978-94-6261-117-7 International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014). 29, Brisbane, Australie, 17 Août 2014/22 Août 2014.

Note générale : A l'occasion de ce congrès, s'est également déroulé International Symposium on Abscission Processes in Horticulture and Non-Destructive Assessment of Fruit Attributes (Brisbane, Australie, 2014-08-17/2014-08-22)

Résumé : Knowledge of the cell separation processes underlying organ abscission is limited mainly to the eudicot model systems tomato and Arabidopsis, while less is known about the mechanisms in crop species in general, and monocots in particular. Here we describe a simple phenotypic screen for oil palm plant lines with delayed or non-abscising fruit. The phenotypic test was used on the two species of oil palm including Elaeis guineensis and E. oleifera, in addition to their interspecific hybrids, and hybrids backcrossed to E. guineensis. A large variation in abscission phenotypes was observed. Histological analysis revealed similarities and differences in the abscission zone (AZ) of E. guineensis and E. oleifera, and dominant traits were observed in the AZ of the interspecific crosses. The expression of abscission marker genes for a polygalacturonase (EgPG4) and an ethylene synthesis ACO synthase (EgACO) were monitored during abscission of a randomly selected set of plants and in a non-abscising individual identified by the phenotypic test.

Mots-clés libres : Oil palm, Fruit abscission

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

Auteurs et affiliations

• Fooyontphanich Kim, IRD (FRA)
• Morcillo Fabienne, CIRAD-BIOS-UMR DIADE (FRA)
• Amblard Philippe, PalmElit (FRA)
• Collin Myriam, IRD (FRA)
• Jantasuriyarat Chatchawan, Kasetsart University (THA)
• Verdeil Jean-Luc, CIRAD-BIOS-UMR AGAP (FRA)
• Tangphatsornruang Sithichoke, BIOTEC [National Center for Genetic Engineering and Biotechnology] (THA)
• Tranbarger Timothy John, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/581722/)

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