Biology and pathogenicity of Xylella fastidiosa associated to olive quick decline syndrome

Autor: Saponari M., Boscia D., Altamura G., Loconsole G., Zicca S., D'Attoma G., Morelli M., Palmisano F., Saponari A., Dongiovanni E., Cavalieri V., Savino V.N., Martelli G.P.
Rok vydání: 2017
Předmět:
Zdroj: European conference on Xylella fastidiosa: finding answers to a global problem, Palma de Mallorca, Spain, 13-15 November 2017
info:cnr-pdr/source/autori:Saponari M., Boscia D., Altamura G., Loconsole G., Zicca S., D'Attoma G., Morelli M., Palmisano F., Saponari A., Dongiovanni E., Cavalieri V., Savino V.N., Martelli G.P./congresso_nome:European conference on Xylella fastidiosa: finding answers to a global problem/congresso_luogo:Palma de Mallorca, Spain/congresso_data:13-15 November 2017/anno:2017/pagina_da:/pagina_a:/intervallo_pagine
DOI: 10.5281/zenodo.1051191
Popis: A large program of mechanical inoculations and vector-mediated transmission experiments was launched in the past 2 years, and continuously implemented, in the attempt to disclose the role of the olive-infecting strain of X. fastidiosa in the olive quick decline disease (OQDS) and to ascertain the crop species under threat due to the expansion of the severe epidemic in southern Italy. Artificial inoculations were performed using the selected olive strain “De Donno” on different olive and grape cvs, stone fruit and citrus species, and ornamentals. These plant species, but including a larger number of olive cultivars, were also tested through field experiments set in the demarcated infected area, by exposing Xylella-free plants to the natural inoculum pressure and/or by caging naturally infected Philaenus spumarius. Comparison of the bacterial infection rates recovered upon mechanical inoculations and vector transmission (field experiments), showed perfect agreement regarding the susceptibility of the different host species: (i) high rates of systemically infected plants were obtained for olives, with some differences in relation to the cultivars, oleanders and Poligala myrtifolia; (ii) very low host colonization occurred for cherry and almond plants; (iii) no bacterial movement and host colonization could be detected in grapes, citrus, apricot, peach and plum. The pathogenicity of this strain has been also demonstrated; severe symptoms were detected on the most susceptible hosts. Acknowledgment This work was supported by the European Food Safety Authority (EFSA) in the framework of the “Pilot project on X. fastidiosa to reduce risk assessment uncertainties” (NP.EFSA.ALPHA.2014.07) and by the European Union’s Horizon 2020 Research and Innovation Programme, under grant agreement No. 635646, POnTE (Pest Organisms Threatening Europe).
Databáze: OpenAIRE
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