Agritrop
Accueil

How does plantain fight against endogenous Banana streak virus-derived infections?

Ricciuti Emeline, Rajeswaran Rajendran, Laboureau Nathalie, Hoestachy Bruno, Caruana Marie-Line. 2019. How does plantain fight against endogenous Banana streak virus-derived infections?. In : Livre des résumés des 17 ème Rencontres de virologie végétale. INRA, CIRAD, CNRS, SFP, SFV. Aussois : INRA, Résumé, 26. Rencontres de Virologie Végétale (RVV 2019). 17, Aussois, France, 27 Janvier 2019/31 Janvier 2019.

Communication sans actes
[img] Version publiée - Anglais
Accès réservé aux agents Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
ID590998.pdf

Télécharger (437kB)

Résumé : Plantain is a natural hybrid coming from interspecific crossing between two major banana species: Musa acuminata (genome A) and Musa balbisiana (genome B). All B genomes contain viral integrations of Banana streak virus (BSV), responsible for the banana streak disease, which affects plant growth and fruit production. The plantain genome (AAB) contains viral integrations of two BSV species (referred as endogenous BSV, or eBSV) and can develop eBSV-derived infections following biotic and abiotic stresses. However, no banana streak disease epidemic has been reported so far on plantain cultures. We suppose that plantain can regulate eBSV-derived infections, probably through RNA silencing acquired through the co-evolution history between B genome and BSV.During my PhD, I followed eBSV-derived infections kinetics in naturals (plantain) and artificial AAB hybrids, on whole mats and for a complete crop cycle. Virus distribution was heterogeneous across the mats, with some suckers showing severe infection while others remained un- or slightly infected. I observed viral titter fluctuations across time, with extreme cases of complete recovery in natural hybrids. Overall, average viral charge was higher in artificial hybrids compared to natural hybrids.Analysis of small virus-derived RNA profiles (from northern blots and deep sequencing) from contrasted samples taken at different stages of the infection, and from both artificial and natural hybrids are in progress. The results aiming to a better understanding of the defence mechanism involved in the infection control will be presented.

Auteurs et affiliations

  • Ricciuti Emeline, CIRAD-BIOS-UMR BGPI (FRA)
  • Rajeswaran Rajendran, University of Basel (CHE)
  • Laboureau Nathalie, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0002-0105-3919
  • Hoestachy Bruno, SPV (Réunion) (REU)
  • Caruana Marie-Line, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0003-4486-2449

Source : Cirad-Agritrop (https://agritrop.cirad.fr/590998/)

Voir la notice (accès réservé à la Dist) Voir la notice (accès réservé à la Dist)

[ Page générée et mise en cache le 2022-01-20 ]