Brenneria tiliae sp. nov., isolated from symptomatic Tilia × moltkei and Tilia × europaea trees in the UK

Kile, Helene; Arnold, Dawn; Allainguillaume, Joel; Denman, Sandra; Brady, Carrie

Abstract

Several strains of a previously undescribed bacterial species were isolated from mature Tilia hybrid trees suffering from bleed-ing cankers at various geographic locations in the UK. The strains were Gram-negative, facultatively anaerobic, and partial sequencing of the gyrB gene revealed that the strains belong to the genus Brenneria with the closest phylogenetic neighbours being Brenneria corticis and Brenneria nigrifluens. Further investigation using a polyphasic approach was undertaken to deter-mine the taxonomic position of the novel species. Phylogenies based on the 16S rRNA gene and multilocus sequence analysis of partial housekeeping gene sequences of gyrB, rpoB, infB and atpD revealed that the strains formed an independent cluster within the genus Brenneria. The phenotypic and chemotaxonomic assays demonstrated that the strains could be differentiated from the closest relatives. Genome analysis of representative strains revealed in silico DNA–DNA hybridization values below the threshold for species delimitation, although the average nucleotide identity values obtained when compared to B. corticis (95.9–96%) were slightly higher than the suggested cut-off value of 95%. However, as all other data suggests that the strains belong to a novel taxon that can be differentiated from the closest relatives, we propose that the strains represent a novel species in the genus Brenneria, Brenneria tiliae sp. nov. (type strain WC1b.1T=LMG 32575T=NCPPB 4697T).

• Journal Article Type: Article
• Acceptance Date: Jun 29, 2022
• Online Publication Date: Oct 7, 2022
• Publication Date: Oct 7, 2022
• Deposit Date: Jun 30, 2022
• Publicly Available Date: Nov 8, 2022
• Journal: International Journal of Systematic and Evolutionary Microbiology
• Print ISSN: 1466-5026
• Electronic ISSN: 1466-5034
• Publisher: Microbiology Society
• Peer Reviewed: Peer Reviewed
• Volume: 72
• Issue: 10
• DOI: https://doi.org/10.1099/ijsem.0.005515
• Keywords: Brenneria tiliae sp. nov.; Tilia x moltkei; Tilia x europaea; trees; UK trees, Brenneria , Brenneria tiliae , Enterobacterales , lime , taxonomy and Tilia
• Public URL: https://uwe-repository.worktribe.com/output/9665727
• Publisher URL: https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.005515