Expansion of banana (Musa acuminata) gene families involved in ethylene biosynthesis and signalling after lineage-specific whole-genome duplications

Jourda Cyril, Cardi Céline, Mbéguié-A-Mbéguié Didier, Bocs Stéphanie, Garsmeur Olivier, D'Hont Angélique, Yahiaoui Nabila. 2014. Expansion of banana (Musa acuminata) gene families involved in ethylene biosynthesis and signalling after lineage-specific whole-genome duplications. New Phytologist, 202 (3) : 986-1000.

Quartile : Outlier, Sujet : PLANT SCIENCES

Résumé : Whole-genome duplications (WGDs) are widespread in plants, and three lineage-specific WGDs occurred in the banana (Musa acuminata) genome. Here, we analysed the impact of WGDs on the evolution of banana gene families involved in ethylene biosynthesis and signalling, a key pathway for banana fruit ripening. Banana ethylene pathway genes were identified using comparative genomics approaches and their duplication modes and expression profiles were analysed. Seven out of 10 banana ethylene gene families evolved through WGD and four of them (1-aminocyclopropane-1-carboxylate synthase (ACS), ethylene-insensitive 3-like (EIL), ethylene- insensitive 3-binding F-box (EBF) and ethylene response factor (ERF)) were preferentially retained. Banana orthologues of AtEIN3 and AtEIL1, two major genes for ethylene signalling in Arabidopsis, were particularly expanded. This expansion was paralleled by that of EBF genes which are responsible for control of EIL protein levels. Gene expression profiles in banana fruits suggested functional redundancy for several MaEBF and MaEIL genes derived from WGD and subfunctionalization for some of them. We propose that EIL and EBF genes were co-retained after WGD in banana to maintain balanced control of EIL protein levels and thus avoid detrimental effects of constitutive ethylene signalling. In the course of evolution, subfunctionalization was favoured to promote finer control of ethylene signalling.

Mots-clés Agrovoc : Musa acuminata, banane, éthylène, biosynthèse, Arabidopsis thaliana, mûrissage, réplication, phylogénie, génome, gène, physiologie végétale

Mots-clés géographiques Agrovoc : Guadeloupe, France

Classification Agris : F30 - Génétique et amélioration des plantes
F60 - Physiologie et biochimie végétale
J11 - Manutention, transport, stockage et conservation des produits d'origine végétale

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Jourda Cyril, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-7799-3501
• Cardi Céline, CIRAD-BIOS-UMR AGAP (FRA)
• Mbéguié-A-Mbéguié Didier, CIRAD-PERSYST-UMR Qualisud (GLP) ORCID: 0000-0002-9256-3999
• Bocs Stéphanie, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7850-4426
• Garsmeur Olivier, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8869-3689
• D'Hont Angélique, CIRAD-BIOS-UMR AGAP (FRA)
• Yahiaoui Nabila, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/573274/)

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