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  • Title: Description of Gibbsiella quercinecans gen. nov., sp. nov., associated with Acute Oak Decline.
    Author: Brady C, Denman S, Kirk S, Venter S, Rodríguez-Palenzuela P, Coutinho T.
    Journal: Syst Appl Microbiol; 2010 Dec; 33(8):444-50. PubMed ID: 21115313.
    Abstract:
    Gram-negative, facultatively anaerobic bacterial strains were consistently isolated from oak trees displaying symptoms of extensive stem bleeding. In Britain, this disorder is called Acute Oak Decline (AOD). A similar condition has been noted on species of Mediterranean oak in Spain. The identity of bacterial isolates from symptomatic trees in both countries was investigated using molecular techniques and phenotypic assays. 16S rRNA gene sequencing indicated that the strains were most closely related to the genera Serratia, Kluyvera, Klebsiella and Raoultella (all>97%). Phylogenetic analysis revealed that the strains formed a distinct lineage within the family Enterobacteriaceae, which was confirmed by both gyrB- and rpoB-gene sequencing. DNA-DNA hybridization confirmed that the strains belonged to a single taxon which could also be differentiated phenotypically from its closest phylogenetic neighbours. The phylogenetic and phenotypic data both demonstrated that the strains isolated from oak represented a novel genus and species within the family Enterobacteriaceae for which the name Gibbsiella quercinecans gen. nov., sp. nov. (type strain=FRB 97(T)=LMG 25500(T)=NCPPB 4470(T)) is proposed.
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