The human-driven impacts on a long-term affair between an iconic Mediterranean fruit tree and its microbiome

Sanguin Hervé, Mahé Frédéric, Ouahmane Lahcen, Tisseyre Pierre, Tournier Estelle, Khassali Hamza, Le Roux Christine, Prin Yves, Miche Lucie, Mirleau Pascal, Duponnois Robin, Arrighi Jean-François, Hafidi Mohamed, Ouhammou A., Vincentelli Bruno, Anziani Carole, Hugo Laetitia, Diadema Katia, Feliner Gonzalo Nieto, Mirleau Fatma, Bou Dagher Kharrat Magda, La Malfa Stefano, Médail Frédéric, Viruel Juan, Baumel Alex. 2018. The human-driven impacts on a long-term affair between an iconic Mediterranean fruit tree and its microbiome. In : Book of abstract of the International Phytobiomes Conference 2018. International Phytobiomes Alliance, INRA, IRD. Montpellier : International Phytobiomes Alliance-INRA, 71. International phytobiomes conference. 2, Montpellier, France, 4 Décembre 2018/6 Décembre 2018.

Résumé : The Mediterranean thermophilous woodlands were shaped by human activities for millenia, mainly for forage and fruits harvest. The recurring exchanges that followed between forests and cultivated areas have constituted a pivotal aspect in the process of Mediterranean fruit tree domestication. Since its domestication in the Middle-East around 6,000-4,000 years BP, the carob tree, Ceratonia siliqua L. (Leguminosae), has probably experienced extensive genetic and physiological modifications conducing to potential changes of a major compartment of its functioning: the microbiome. The carob tree is highly dependent of arbuscular mycorrhizal (AM) symbiosis, but some evidences tends to demonstrate bacterial endophytes as a second major symbiotic partner. In the framework of the international project DYNAMIC (Deciphering sYmbiotic Networks in cArob-based MedIterranean agro-eCosystems), high-throughput sequencing methods were applied to estimate several proxies of the carob tree-microbiome diversity and to correlate it to carob tree ecology and phylogeography at the Mediterranean scale. The results provide new insights into the characterization of a Mediterranean core and accessory carob tree-microbiome, highlighting geographical patterns, as well as the contribution of host genetic diversity, habitat and edaphic parameters. New avenues for reflexion regarding the relative role of history and habitat (cultivated vs wild) as drivers of tree-microbiome are also proposed. The conclusions open up promising perspectives for the development of more efficient strategies in conservation and agroecology based on tree-microbiome management.

Auteurs et affiliations

• Sanguin Hervé, CIRAD-BIOS-UMR BGPI (FRA)
• Mahé Frédéric, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0002-2808-0984
• Ouahmane Lahcen, Université Cadi Ayyad (MAR)
• Tisseyre Pierre, IRD (FRA)
• Tournier Estelle, CIRAD-BIOS-UMR LSTM (FRA)
• Khassali Hamza, CIRAD-BIOS-UMR LSTM (FRA)
• Le Roux Christine, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0003-0668-3589
• Prin Yves, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-3706-0045
• Miche Lucie, IRD (FRA)
• Mirleau Pascal, IMBE (FRA)
• Duponnois Robin, IRD (FRA)
• Arrighi Jean-François, IRD (FRA)
• Hafidi Mohamed, Université Cadi Ayyad (MAR)
• Ouhammou A., Université Cadi Ayyad (MAR)
• Vincentelli Bruno, Corsican Environmental Office (FRA)
• Anziani Carole, Corsican Environmental Office (FRA)
• Hugo Laetitia, Corsican Environmental Office (FRA)
• Diadema Katia, Conservatoire Botanique National Méditerranéen de Porquerolles (FRA)
• Feliner Gonzalo Nieto, Real Jardin Botanico (ESP)
• Mirleau Fatma, IMBE (FRA)
• Bou Dagher Kharrat Magda, Université Saint-Joseph (LBN)
• La Malfa Stefano, University of Catania (ITA)
• Médail Frédéric, IMBE (FRA)
• Viruel Juan, Royal Botanic Garden (GBR)
• Baumel Alex, IMBE (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/591983/)

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