Synergy between an emerging monopartite begomovirus and a DNA-B component

Ouattara Alassane, Tiendrebeogo Fidèle, Becker Nathalie, Urbino Cica, Thébaud Gaël, Hoareau Murielle, Allibert Agathe, Chiroleu Frédéric, Vernerey Marie-Stéphanie, Traoré Edgar Valentin, Barro Nicolas, Traoré Oumar, Lefeuvre Pierre, Lett Jean-Michel. 2022. Synergy between an emerging monopartite begomovirus and a DNA-B component. Scientific Reports, 12:695, 11 p.

https://doi.org/10.1038/s41598-021-03957-7

Article de revue ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total

Prévisualisation

Version publiée - Anglais
Sous licence

.
604042.pdf
Télécharger (1MB) | Prévisualisation

Résumé : In recent decades, a legion of monopartite begomoviruses transmitted by the whitefly Bemisia tabaci has emerged as serious threats to vegetable crops in Africa. Recent studies in Burkina Faso (West Africa) reported the predominance of pepper yellow vein Mali virus (PepYVMLV) and its frequent association with a previously unknown DNA-B component. To understand the role of this DNA-B component in the emergence of PepYVMLV, we assessed biological traits related to virulence, virus accumulation, location in the tissue and transmission. We demonstrate that the DNA-B component is not required for systemic movement and symptom development of PepYVMLV (non-strict association), but that its association produces more severe symptoms including growth arrest and plant death. The increased virulence is associated with a higher viral DNA accumulation in plant tissues, an increase in the number of contaminated nuclei of the phloem parenchyma and in the transmission rate by B. tabaci. Our results suggest that the association of a DNA-B component with the otherwise monopartite PepYVMLV is a key factor of its emergence.

Mots-clés géographiques Agrovoc : Burkina Faso

Mots-clés libres : Ecology, Evolution, Microbiology

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 Regional Development Fund

Agences de financement hors UE : Agropolis Fondation

Auteurs et affiliations