Vessel occlusion in three cultivars of Olea europaea naturally exposed to Xylella fastidiosa in open field

• DOI: 10.1111/jph.12596
• Publication Date: 2017-06-19T07:13:04Z
• Authors: Maria De Benedictis; Monica De Caroli; Ivan Baccelli; Guido Marchi; Gianluca Bleve; Antonia Gallo; Francesco Ranaldi; Vittorio Falco; Vittorio Pasquali; Gabriella Piro; Giovanni Mita; Gian Pietro Di Sa...
• Keywords: Xylella fastidiosa; Olea; Oleaceae; Olive trees

Abstract Xylella fastidiosa is a Gram‐negative, xylem‐limited, bacterium which responsible, in Italy, for the olive quick decline syndrome ( OQDS ). The disease caused by subspecies pauca and emerged few years ago Apulia province of Lecce, Salento peninsula, on Olea europaea plants . X. can infect different plant species well known California as causal agent Pierce's grape. Infections susceptible hosts with are to result xylem vessel occlusions, water movement impairment, accordingly induce typical desiccation symptoms. In this study, we investigated occlusions healthy naturally infected O. grown open field analysing three cultivars widespread region that show degree susceptibility disease: “Ogliarola salentina” “Cellina di Nardò,” tolerant cultivar “Leccino.” Our results were tyloses gums/pectin gels, not bacterial cell aggregates. data also indicate responsible symptomatology and, observed Leccino plants, they marker tolerance/resistance disease.