Imperial College London
Alternate

DrXavierDidelot

Faculty of Medicine, School of Public Health

Visiting Professor
 
 
 
//

Contact

 

+44 (0)20 7594 3622x.didelot

 
 
//

Location

 

G30Medical SchoolSt Mary's Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Lassalle:2021:10.1016/j.syapm.2020.126165,
author = {Lassalle, F and Dastgheib, SMM and Zhao, F-J and Zhang, J and Verbag, S and Fruhling, A and Brinkmann, H and Osborne, T and Sikorski, J and Balloux, F and Didelot, X and Santini, J and Petersen, J},
doi = {10.1016/j.syapm.2020.126165},
journal = {Systematic and Applied Microbiology},
pages = {1--14},
title = {Phylogenomics reveals the basis of adaptation of Pseudorhizobium species to extreme environments and supports a taxonomic revision of the genus},
url = {http://dx.doi.org/10.1016/j.syapm.2020.126165},
volume = {44},
year = {2021}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The family Rhizobiaceae includes many genera of soil bacteria, often isolated for their association with plants. Herein, we investigate the genomic diversity of a group of Rhizobium species and unclassified strains isolated from atypical environments, including seawater, rock matrix or polluted soil. Based on whole-genome similarity and core genome phylogeny, we show that this group corresponds to the genus Pseudorhizobium. We thus reclassify Rhizobium halotolerans, R. marinum, R. flavum and R. endolithicum as P. halotolerans sp. nov., P. marinum comb. nov. , P. flavum comb. nov. and P. endolithicum comb. nov. , respectively, and show that P. pelagicum is a synonym of P. marinum . We also delineate a new chemolithoautotroph species, P. banfieldiae sp. nov. , whose type strain is NT-26 T (= DSM 106348 T = CFBP 8663 T ) . This genome-based classification was supported by a chemotaxonomic comparison, with increasing taxonomic resolution provided by fatty acid, protein and metabolic profiles. In addition, we used a phylogenetic approach to infer scenarios of duplication, horizontal transfer and loss for all genes in the Pseudorhizobium pangenome. We thus identify the key functions associated with the diversification of each species and higher clades, shedding light on the mechanisms of adaptation to their respective ecological niches. Respiratory proteins acquired at the origin of Pseudorhizobium were combined with clade-specific genes to enable different strategies for detoxification and nutrition in harsh, nutrient- poor environments.
AU  - Lassalle,F
AU  - Dastgheib,SMM
AU  - Zhao,F-J
AU  - Zhang,J
AU  - Verbag,S
AU  - Fruhling,A
AU  - Brinkmann,H
AU  - Osborne,T
AU  - Sikorski,J
AU  - Balloux,F
AU  - Didelot,X
AU  - Santini,J
AU  - Petersen,J
DO  - 10.1016/j.syapm.2020.126165
EP  - 14
PY  - 2021///
SN  - 0172-5564
SP  - 1
TI  - Phylogenomics reveals the basis of adaptation of Pseudorhizobium species to extreme environments and supports a taxonomic revision of the genus
T2  - Systematic and Applied Microbiology
UR  - http://dx.doi.org/10.1016/j.syapm.2020.126165
UR  - https://www.sciencedirect.com/science/article/pii/S072320202030120X?via%3Dihub
UR  - http://hdl.handle.net/10044/1/84935
VL  - 44
ER  -
Download