Multi-scale spatial genetic structure of the vector-borne pathogen 'Candidatus Phytoplasma prunorum' in orchards and in wild habitats

Marie-Jeanne Véronique, Bonnot François, Thébaud Gaël, Peccoud Jean, Labonne Gérard, Sauvion Nicolas. 2020. Multi-scale spatial genetic structure of the vector-borne pathogen 'Candidatus Phytoplasma prunorum' in orchards and in wild habitats. Scientific Reports, 10 (1):5002, 13 p.

https://doi.org/10.1038/s41598-020-61908-0

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Url - jeu de données - Entrepôt autre : https://doi.org/10.14758/9T8G-WJ20

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Inferring the dispersal processes of vector-borne plant pathogens is a great challenge because the plausible epidemiological scenarios often involve complex spread patterns at multiple scales. The spatial genetic structure of 'Candidatus Phytoplasma prunorum', responsible for European stone fruit yellows disease, was investigated by the application of a combination of statistical approaches to genotype data of the pathogen sampled from cultivated and wild compartments in three French Prunus-growing regions. This work revealed that the prevalence of the different genotypes is highly uneven both between regions and compartments. In addition, we identified a significant clustering of similar genotypes within a radius of 50 km or less, but not between nearby wild and cultivated Prunus. We also provide evidence that infected plants are transferred between production areas, and that both species of the Cacopsylla pruni complex can spread the pathogen. Altogether, this work supports a main epidemiological scenario where 'Ca. P. prunorum' is endemic in — and generally acquired from — wild Prunus by its immature psyllid vectors. The latter then migrate to shelter plants that epidemiologically connect sites less than 50 km apart by later providing infectious mature psyllids to their “migration basins”. Such multi-scale studies could be useful for other pathosystems.

Mots-clés Agrovoc : épidémiologie, pathologie végétale, Phytoplasma prunorum, agent pathogène, Prunus, maladie transmise par vecteur

Mots-clés géographiques Agrovoc : France

Mots-clés libres : Ecological epidemiology, Ecological networks, Ecology, Entomology

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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