Abstract:
:The genus Rhodococcus contains several species with agricultural, biotechnological and ecological importance. Within this genus, many phyllosphere, rhizosphere and endosphere strains are plant growth promoting bacteria, whereas strains designated as R. fascians are plant pathogens. In this study, we isolated 47 Rhodococcus strains from a range of herbaceous and woody plant species. Phylogenetic analysis based on 16S rDNA, gyrB and alkB genes was used to compare our strains with type strains of Rhodococcus. For most of our strains, sequence similarity of the 16S rDNA, gyrB and alkB regions to type strains ranged from 98-100 %. Results of the concatenated gene sequence comparisons identified 18 strains of R. fascians and three strains of R. kroppenstedtii. The remaining strains were unclassified, and may represent novel species of Rhodococcus. Phylogenetic analysis based on gyrB sequences provided a more precise classification of our strains to species level than 16S rDNA sequences, whereas analysis of alkB sequences was unable to identify strains with orange-coloured colonies to species level.
journal_name
Int J Syst Evol Microbiolauthors
Dhaouadi S,Mougou AH,Wu CJ,Gleason ML,Rhouma Adoi
10.1099/ijsem.0.004521subject
Has Abstractpub_date
2020-12-01 00:00:00pages
6491-6507issue
12eissn
1466-5026issn
1466-5034journal_volume
70pub_type
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