Virome release of an invasive exotic plant species in Southern France

Moubset Oumaima, Filloux Denis, Fontes Hugo, Julian Charlotte, Fernandez Emmanuel, Claude Lisa, Galzi Serge, Chiroleu Frédéric, Mesleard François, Kraberger Simona, Custer Joy M., Salywon Andrew M., Makings Elizabeth, Martin Patrick Darren, Varsani Arvind, Ravigne Virginie, Roumagnac Philippe. 2023. Virome release of an invasive exotic plant species in Southern France. In : 12th International Congress of Plant Pathology (ICPP 2023): One health for all plants, crops and trees. Book of abstracts. ISPP, SFP. Lyon : ISPP, Résumé, 1081-1082. International Conference on Plant Pathology (ICPP 2023). 12, Lyon, France, 20 Août 2023/25 Août 2023.

Résumé : The increase in human-mediated introduction of plant species to new regions due to global travel and globalization has resulted in a rise of invasive exotic plants (IEPs) that can have significant effects on biodiversity, ecosystem processes, and food production. The introduction of IEPs to new regions often occurs through seed dispersal, and most pathogens are not vertically transmitted, leading to low viral loads in these plants. Also, most pathogens are not evenly distributed across the Earth, meaning that IEPs colonizing a new territory are unlikely to encounter pathogens from their native range. This situation, referred to as the "enemy-release hypothesis" suggests that decreased pathogen-mediated selective pressures on IEPs in colonized territories will result in increased IEP populations, densities, and geographical distributions. To test the enemy-release hypothesis, the virome of an invasive cane bluestem (Bothriochloa barbinodis) was compared to that of four or more indigenous grass species in both naturalized and native ranges. The results showed that the IEPs had lower viral infection loads than the native grasses, providing evidence that supports the enemy release hypothesis. Novel viruses associated with Bothriochloa barbinodis were further partially or fully sequenced and the phylogenetic relationships of these viral sequences and representative sequences of corresponding virus families were analyzed.

Auteurs et affiliations

• Moubset Oumaima, CIRAD-BIOS-UMR PHIM (FRA)
• Filloux Denis, CIRAD-BIOS-UMR PHIM (FRA)
• Fontes Hugo, La Tour du Valat, Centre de recherche pour la conservation des zones humides méditerranéennes (FRA)
• Julian Charlotte, CIRAD-BIOS-UMR PHIM (FRA)
• Fernandez Emmanuel, CIRAD-BIOS-UMR PHIM (FRA)
• Claude Lisa
• Galzi Serge, CIRAD-BIOS-UMR PHIM (FRA)
• Chiroleu Frédéric, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0002-4874-5357
• Mesleard François, La Tour du Valat, Centre de recherche pour la conservation des zones humides méditerranéennes (FRA)
• Kraberger Simona, Arizona State University (USA)
• Custer Joy M., Arizona State University (USA)
• Salywon Andrew M., Desert Botanical Garden (USA)
• Makings Elizabeth, Arizona State University (USA)
• Martin Patrick Darren, UCT (ZAF)
• Varsani Arvind, UCT (ZAF)
• Ravigne Virginie, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0002-4252-2574
• Roumagnac Philippe, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0001-5002-6039

Source : Cirad-Agritrop (https://agritrop.cirad.fr/609903/)

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