Diversity within the novel Dickeya fangzhongdai sp., isolated from infected orchids, water and pears

Members of the genus Dickeya are plant pathogens that mostly cause soft‐rot diseases. Diversity within the genus has led to the recent description of three novel species (i.e. a mainly clonal D. solani of economic consequence in potatoes, D. aquatica from water samples and D. fangzhongdai isolated f...

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Bibliographic Details
Published inPlant pathology Vol. 67; no. 7; pp. 1612 - 1620
Main Authors Alič, Š., Van Gijsegem, F., Pédron, J., Ravnikar, M., Dreo, T.
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.09.2018
Wiley
Subjects
ANI
carbon utilization
Dickeya fangzhongdai
diversity
Environmental Sciences
Fruit trees
Genomic analysis
Life Sciences
MLSA
Morphology
Pears
Phenotypic variations
Potatoes
Reclassification
Rot
Strains (organisms)
Water analysis
Water sampling
carbon utilization
D-PSICOSE
PHYLOGENY
SEQUENCES
SPECIES DEFINITION
MLSA
diversity
TREES
BACILLUS-SUBTILIS
ANNOTATION
SP-NOV
ANI
Dickeya fangzhongdai
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Summary:Members of the genus Dickeya are plant pathogens that mostly cause soft‐rot diseases. Diversity within the genus has led to the recent description of three novel species (i.e. a mainly clonal D. solani of economic consequence in potatoes, D. aquatica from water samples and D. fangzhongdai isolated from necrotic pear trees in China). However, multilocus sequence analysis (MLSA) has highlighted the occurrence of seven isolates not related to the defined Dickeya species. These include a previously unclassified group of Dickeya strains isolated from monocotyledonous plants, Dickeya sp. S1, Dickeya sp. B16, and Dickeya sp. NCPPB 3274, as well as Dickeya sp. MK7, a strain isolated from water, and misassigned strains D. solani ND14, D. solani M005 and D. chrysanthemi M074. Here, it is reported that these isolates can be classified as D. fangzhongdai by using average nucleotide identity analysis and MLSA. However, variations in phenotypic characterization featuring colony morphology and carbon utilization assays revealed a diversity of bacterial isolates classified as D. fangzhongdai. Based on the results of the genomic analysis, the classification of Dickeya sp. S1, Dickeya sp. B16, Dickeya sp. MK7, Dickeya sp. NCPPB 3274 to D. fangzhongdai is proposed as well as the reclassification of D. solani ND14, D. solani M005 and D. chrysanthemi M074 to D. fangzhongdai.
ISSN:0032-0862
1365-3059
DOI:10.1111/ppa.12866