Taxonomic Refinement of Xanthomonas arboricola

Xanthomonas arboricola comprises a number of economically important fruit tree pathogens classified within different pathovars. Dozens of nonpathogenic and taxonomically unvalidated strains are also designated as X. arboricola, leading to a complicated taxonomic status in the species. In this study, we have evaluated the whole-genome resources of all available Xanthomonas spp. strains designated as X. arboricola in the public databases to refine the members of the species based on DNA similarity indexes and core genome-based phylogeny. Our results show that, of the nine validly described pathovars within X. arboricola, pathotype strains of seven pathovars are taxonomically genuine, belonging to the core clade of the species regardless of their pathogenicity on the host of isolation (thus the validity of pathovar status). However, strains of X. arboricola pv. guizotiae and X. arboricola pv. populi do not belong to X. arboricola because of the low DNA similarities between the type strain of the species and the pathotype strains of these two pathovars. Thus, we propose to elevate the two pathovars to the rank of a species as X. guizotiae sp. nov. with the type strain CFBP 7408T and X. populina sp. nov. with the type strain CFBP 3123T. In addition, other mislabeled strains of X. arboricola were scattered within Xanthomonas spp. that belong to previously described species or represent novel species that await formal description.

Bibliographic Details

Main Authors:	Zarei, Sadegh, Taghavi, S. Mohsen, Rahimi, Touraj, Mafakheri, Hamzeh, Potnis, Neha, Koebnik, Ralf, Fischer-Le Saux, Marion, Pothier, Joël F., Palacio-Bielsa, Ana, Cubero, Jaime, Portier, Perrine, Jacques, Marie-Agnès, Osdaghi, Ebrahim
Other Authors:	Iranian National Science Foundation
Format:	artículo biblioteca
Language:	English
Published:	American Phytopathological Society 2022-07-04
Subjects:	Xanthomonas spp, Bacterial pathogens, Bacterial spot, Bacterial taxonomy, Leaf blight, Stone fruits, Walnut,
Online Access:	http://hdl.handle.net/10261/307700 http://dx.doi.org/10.13039/501100004481 http://dx.doi.org/10.13039/501100003968 http://dx.doi.org/10.13039/501100005071 https://api.elsevier.com/content/abstract/scopus_id/85130996573
Tags:	Add Tag No Tags, Be the first to tag this record!