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      Genome Sequence of the Potato Plant Pathogen Dickeya dianthicola Strain RNS04.9

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          Abstract

          Dickeya dianthicola is one of the causative agents of soft rot and blackleg diseases, which are currently identified in European countries in a wide range of crops. Here, we report the draft genome sequence of D. dianthicola strain RNS04.9, which was isolated from a potato plant with blackleg symptoms in 2004.

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          Host range and molecular phylogenies of the soft rot enterobacterial genera pectobacterium and dickeya.

          ABSTRACT Pectobacterium and Dickeya spp. are related broad-host-range entero-bacterial pathogens of angiosperms. A review of the literature shows that these genera each cause disease in species from at least 35% of angiosperm plant orders. The known host ranges of these pathogens partially overlap and, together, these two genera are pathogens of species from 50% of angiosperm plant orders. Notably, there are no reported hosts for either genus in the eudicots clade and no reported Dickeya hosts in the magnoliids or eurosids II clades, although Pectobacterium spp. are pathogens of at least one plant species in the magnoliids and at least one in each of the three eurosids II plant orders. In addition, Dickeya but not Pectobacterium spp. have been reported on a host in the rosids clade and, unlike Pectobacterium spp., have been reported on many Poales species. Natural disease among nonangiosperms has not been reported for either genus. Phylogenetic analyses of sequences concatenated from regions of seven housekeeping genes (acnA, gapA, icdA, mdh, mtlD, pgi, and proA) from representatives of these genera demonstrated that Dickeya spp. and the related tree pathogens, the genus Brenneria, are more diverse than Pectobacterium spp. and that the Pectobacterium strains can be divided into at least five distinct clades, three of which contain strains from multiple host plants.
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            Dickeya species: an emerging problem for potato production in Europe

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              Transfer of Pectobacterium chrysanthemi (Burkholder et al. 1953) Brenner et al. 1973 and Brenneria paradisiaca to the genus Dickeya gen. nov. as Dickeya chrysanthemi comb. nov. and Dickeya paradisiaca comb. nov. and delineation of four novel species, Dickeya dadantii sp. nov., Dickeya dianthicola sp. nov., Dickeya dieffenbachiae sp. nov. and Dickeya zeae sp. nov.

              A collection of 75 strains of Pectobacterium chrysanthemi (including all biovars and pathovars) and the type strains of Brenneria paradisiaca (CFBP 4178(T)) and Pectobacterium cypripedii (CFBP 3613(T)) were studied by DNA-DNA hybridization, numerical taxonomy of 121 phenotypic characteristics, serology and 16S rRNA gene-based phylogenetic analyses. From analysis of 16S rRNA gene sequences, it was deduced that P. chrysanthemi strains and B. paradisiaca CFBP 4178(T) formed a clade distinct from the genera Pectobacterium and Brenneria; therefore, it is proposed to transfer all the strains to a novel genus, Dickeya gen. nov. By DNA-DNA hybridization, the strains of P. chrysanthemi were distributed among six genomic species: genomospecies 1 harbouring 16 strains of biovar 3 and four strains of biovar 8, genomospecies 2 harbouring 16 strains of biovar 3, genomospecies 3 harbouring two strains of biovar 6 and five strains of biovar 5, genomospecies 4 harbouring five strains of biovar 2, genomospecies 5 harbouring six strains of biovar 1, four strains of biovar 7 and five strains of biovar 9 and genomospecies 6 harbouring five strains of biovar 4 and B. paradisiaca CFBP 4178(T). Two strains of biovar 3 remained unclustered. Biochemical criteria, deduced from a numerical taxonomic study of phenotypic characteristics, and serological reactions allowed discrimination of the strains belonging to the six genomic species. Thus, it is proposed that the strains clustered in these six genomic species be assigned to the species Dickeya zeae sp. nov. (type strain CFBP 2052(T)=NCPPB 2538(T)), Dickeya dadantii sp. nov. (type strain CFBP 1269(T)=NCPPB 898(T)), Dickeya chrysanthemi comb. nov. (subdivided into two biovars, bv. chrysanthemi and bv. parthenii), Dickeya dieffenbachiae sp. nov. (type strain CFBP 2051(T)=NCPPB 2976(T)), Dickeya dianthicola sp. nov. (type strain CFBP 1200(T)=NCPPB 453(T)) and Dickeya paradisiaca comb. nov., respectively.
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                Author and article information

                Journal
                Genome Announc
                Genome Announc
                ga
                ga
                GA
                Genome Announcements
                American Society for Microbiology (1752 N St., N.W., Washington, DC )
                2169-8287
                4 June 2015
                May-Jun 2015
                : 3
                : 3
                : e00581-15
                Affiliations
                [a ]Institute for Integrative Biology of the Cell (I2BC), CNRS CEA University Paris-Sud, Saclay Plant Sciences, Gif-sur-Yvette, France
                [b ]Fédération Nationale des Producteurs de Plants de Pomme de Terre–Recherche, Développement, Promotion du Plant de Pommes de Terre (FN3PT-RD3PT), Paris, France
                Author notes
                Address correspondence to Valérie Hélias, valerie.helias@ 123456fnpppt.fr , or Denis Faure, faure@ 123456isv.cnrs-gif.fr .
                Article
                genomeA00581-15
                10.1128/genomeA.00581-15
                4457066
                26044429
                2c4f06a8-12c8-42b1-b5f2-ebc5decd1b18
                Copyright © 2015 Raoul des Essarts et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported license.

                History
                : 29 April 2015
                : 1 May 2015
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 23, Pages: 2, Words: 1720
                Categories
                Prokaryotes
                Custom metadata
                May/June 2015
                free

                Genetics
                Genetics

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