Tree depicting the phylogenetic relationships of all strains included in this study. Tree depicting the phylogenetic relationships of all strains included.

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Tree depicting the phylogenetic relationships of all strains included in this study. Tree depicting the phylogenetic relationships of all strains included in this study. We surveyed VOCs produced by 48 soil- and airborne-dust-associated actinobacterial strains. The phylogeny was constructed from nucleotide alignments of partial 16S rRNA gene sequences using maximum likelihood and a GTRGAMMA model of evolution. The bar indicates nucleotide substitutions per site. Nodes with bootstrap support values of ≥70 are labeled. The tree was rooted with Bifidobacterium bifidum strain JCM 1255 and Bifidobacterium breve strain KSS01. Strain names reflect their isolation conditions and culture collection of origin (see Table S1 in the supplemental material). Strains are colored by their taxonomic assignment at the family level according to the key, and taxonomic assignments at the genus and species levels are included when available. The family Nocardiaceae is not monophyletic. Mallory Choudoir et al. mSystems 2019; doi:10.1128/mSystems.00295-18