Grapevine and trunk pathogen transcriptomic changes induced by the root biocontrol agent Pythium oligandrum

Trabajo presentado en el 10th International Workshop on Grapevine Trunk Diseases, celebrado en Reims (Francia), del 4 al 7 de julio de 2017Peer reviewe

Control of a fungus involved in grapevine trunk disease (Esca) by using the oomycete, Pythium oligandrum : analysis of the induced resistance

International audienc

Characterization of biocontrol strains of Pythium oligandrum and control of an Esca pathogenic fungus attack

article présenté lors du 2011 APS-IPPC Joint Meeting ; Honolulu - Hawaii (Etats-Unis) - (2011-08-06 - 2011-08-10) / RencontresInternational audienc

Study of Lasidiodiplodia pseudotheobromae, Neofusicoccum parvum and Schizophyllum commune, three pathogenic fungi associated with the Grapevine Trunk Diseases in the North of Tunisia

International audienc

Sodium arsénite application on plants expression grapevine trunk diseases-foliar symtpoms: impact on grapevine physiology.

International audienc

Major changes in grapevine wood microbiota are associated with the onset of esca, a devastating trunk disease

Esca, a major grapevine trunk disease in old grapevines, is associated with the colonization of woody tissues by a broad range of plant pathogenic fungi. To identify which fungal and bacterial species are involved in the onset of this disease, we analysed the microbiota from woody tissues of young (10-year-old) grapevines at an early stage of esca. Using meta-barcoding, 515 fungal and 403 bacterial operational taxonomic units (OTUs) were identified in woody tissues.In situhybridization showed that these fungi and bacteria co-inhabited in grapevine woody tissues. In non-necrotic woody tissues, fungal and bacterial microbiota varied according to organs and seasons but not diseased plant status.Phaeomoniella chlamydospora, involved in the Grapevine trunk disease, was the most abundant species in non-necrotic tissues from healthy plants, suggesting a possible non-pathogenic endophytic behaviour. Most diseased plants (70%) displayed cordons, with their central white-rot necrosis colonized essentially by two plant pathogenic fungi (Fomitiporia mediterranea: 60%-90% andP. chlamydospora: 5%-15%) and by a few bacterial taxa (Sphingomonasspp. andMycobacteriumspp.). The occurrence of a specific association of fungal and bacterial species in cordons from young grapevines expressing esca-foliar symptoms strongly suggests that that microbiota is involved in the onset of this complex disease