Risk assessment of infectious endogenous banana streak viruses in Guadeloupe

Umber Marie, Pressat Gersende, Fort Guillaume, Pineau Kaïssa, Giougou Chantal, Lambert Frédéric, Farinas Benoît, Pichaut Jean-Philippe, Janzac Bérenger, Delos Jean-Marie Eric, Salmon Frédéric, Dubois Cécile, Teycheney Pierre-Yves. 2022. Risk assessment of infectious endogenous banana streak viruses in Guadeloupe. Frontiers in Plant Science, 13:951285, 12 p.

Résumé : Infectious alleles of endogenous banana streak viruses (eBSVs) are present in the genome of all banana interspecific cultivars, including plantains and cooking types. Activation of these infectious eBSV alleles by biotic and abiotic stresses leads to spontaneous infections by cognate viruses and raises concerns about their ability to promote outbreaks of banana streak viruses under field cultivation conditions. We undertook a comprehensive risk assessment study of infectious eBSV alleles of species BSOLV, BSGFV and BSIMV in banana interspecific cultivars in Guadeloupe, a tropical island of the Caribbean where bananas are grown for export and local markets. We carried out a prevalence survey of BSOLV, BSGFV and BSIMV species in a range of cultivars grown in Guadeloupe. Our results suggest that BSOLV and BSGFV infections arise from the activation of infectious eBSVs rather than vector-borne transmission and point to a correlation between altitude and infection rates in interspecific hybrids with AAB genotypes. We studied the dynamics of activation of infectious eBSOLV and eBSGFV alleles by tissue culture and field cultivation in a range of cultivars. We showed that tissue culture and field cultivation trigger distinct activation pathways, resulting in distinct activation patterns. We also showed that activation decreased over time during cell culture and field cultivation and that BSV infections arising from the activation of infectious eBSV alleles cause symptomless infections in the most cultivated plantain in Guadeloupe, French Clair. Overall, our study shows that the risk of BSV outbreaks resulting from the activation of infectious eBSVs in plantain originating from vegetative multiplication is negligible in Guadeloupe.

Mots-clés Agrovoc : virus des végétaux, Musa, évaluation du risque, surveillance épidémiologique

Mots-clés géographiques Agrovoc : Guadeloupe, France

Mots-clés complémentaires : Banana streak virus

Mots-clés libres : Endogenous banana streak viruses, Infectious alleles, Activation, Musa, risk assessment

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement européennes : European Commission, European Regional Development Fund

Agences de financement hors UE : Préfecture de Guadeloupe, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Conseil Régional de Guadeloupe

Programme de financement européen : INTERREG IV Caraïbes

Projets sur financement : (EU) Caribbean Network for the Prevention and Sustainable Control of Emerging Diseases of Bananas, (EU) Maladies infectieuses humaines, animales et végétales en milieu insulaire tropical : surveillance, diagnostic, contrôle et impact, (EU) IntensEcoPlantain

Auteurs et affiliations

• Umber Marie, INRAE (GLP)
• Pressat Gersende, CIRAD-BIOS-UMR AGAP (GLP)
• Fort Guillaume, INRAE (FRA)
• Pineau Kaïssa, CIRAD-BIOS-UMR ASTRE (GLP) ORCID: 0009-0000-1998-4618
• Giougou Chantal, CIRAD-BIOS-UMR AGAP (GLP)
• Lambert Frédéric, CIRAD-BIOS-UMR AGAP (GLP)
• Farinas Benoît, Université de Montpellier (FRA)
• Pichaut Jean-Philippe, Université de Montpellier (FRA)
• Janzac Bérenger, INRAE (FRA)
• Delos Jean-Marie Eric, CIRAD-BIOS-UMR AGAP (GLP)
• Salmon Frédéric, CIRAD-BIOS-UMR AGAP (GLP)
• Dubois Cécile, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-9167-4080
• Teycheney Pierre-Yves, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0002-9754-0745 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/603333/)

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