taxonomy
Table of Contents
Taxonomy
Disclaimer
- The taxonomy of agrobacteria and rhizobia is complicated by a long history of frequent revisions, which often cause confusions. The information provided here reflects the consensus among the major contributors of this site.
- For authoritative information, please refer to the Subcommittee on Taxonomy of Rhizobia and Agrobacteria of the International Committee on Systematics of Prokaryotes (ICSP).
- Minimal standards for the description of new genera and species of rhizobia and agrobacteria. https://doi.org/10.1099/ijsem.0.003426
Phylogeny
- A simplified illustration: see Figure 1 of https://doi.org/10.1146/annurev-phyto-021622-125009
- Strains with genome sequences available as of 2022: see Figure S2 of https://doi.org/10.1146/10.1098/rstb.2020.0466
Genus Names
- Agrobacterium: 1 circular chromosome (~2.9 Mb) + 1 linear chromid (~2.2 Mb); BV1 & BV1-like. The linear chromid is a specific trait.
- Allorhizobium: 1 circular chromosome (~3.7 Mb) + 1 circular chromid (~1.3 Mb); BV3.
- Rhizobium: 1 circular chromosome (~3.8-4.8 Mb) + 1 or more circular chromids; BV2, BV2-like, and diverse rhizobia.
Biovars (BV) of Agrobacteria
BV1
- BV1: the Agrobacterium tumefaciens species complex, divided into multiple genomospecies (G?), some have Latin names:
| Genomospecies | Species Name | Representative Strains | Note |
|---|---|---|---|
| G1 | Agrobacterium fabacearum | CNPSo 675T (= UMR 1457T = LMG 31642T), Ach5, 1D1108 | https://lpsn.dsmz.de/species/agrobacterium-fabacearum; NCBI; 10.1099/ijsem.0.004278 |
| G2 | Agrobacterium pusense | DSM 22668T, H41, CFBP 5875 | https://lpsn.dsmz.de/species/agrobacterium-pusense |
| G3 | Agrobacterium tomkonis | IIF1SW-B1T (= LMG 32164T = NRRL B-65602T), SUL3, CFBP 6623 | https://lpsn.dsmz.de/species/agrobacterium-tomkonis |
| G4 | Agrobacterium radiobacter | B6, 1D1460 | |
| G5 | NA | CFBP 6625, CFBP 6626 | |
| G6 | NA | NCPPB 925, CFBP 5499, CFBP 5877 | |
| G7 | Agrobacterium deltaense | YIC4121T, 1D1609 | https://lpsn.dsmz.de/species/agrobacterium-deltaense; Nomenclatural status: not validly published; Taxonomic status: preferred name (not correct name) |
| G8 | Agrobacterium fabrum | C58 | https://lpsn.dsmz.de/species/agrobacterium-fabrum; Nomenclatural status: not validly published; Taxonomic status: preferred name (not correct name) |
| G9 | Agrobacterium salinitolerans | https://lpsn.dsmz.de/species/agrobacterium-salinitolerans; YIC 5082T, CFBP 5506, CFBP 5507 | |
| G12 | NA | ||
| G13 | NA | CFBP 6927 | |
| G14 | Agrobacterium nepotum | 39/7 | |
| G15 | Agrobacterium viscosum | ATCC 31113 | |
| G16 | NA | ||
| G17 | NA | ||
| G18 | NA | ||
| G19 | Agrobacterium burrii | RnrT (= CFBP 8705T = DSM 112541T) | https://doi.org/10.1094/PHYTO-11-21-0463-SC |
| G20 | Agrobacterium shirazense | OT33T (= CFBP 8901T = DSM 112540T) | https://doi.org/10.1094/PHYTO-11-21-0463-SC |
| G21 | NA | K599, MAFF210266 | |
| G22 | NA | KCJK1736 | |
| NA | Agrobacterium arsenijevicii | KFB 330T (= CFBP 8308T = LMG 28674T) | sister of Agrobacterium nepotum; https://doi.org/10.1016/j.syapm.2015.06.001; LPSN |
| NA | Agrobacterium leguminum | MOPV5T (= CECT 30096T = LMG 31779T) | sister of Agrobacterium deltaense; https://doi.org/10.1099/ijsem.0.005120 |
BV1-like
- BV1-like: sister group of BV1; similar to BV1 in having a linear chromid; All species classified to the genus Agrobacterium
- Agrobacterium bohemicum
- Agrobacterium larrymoorei
- Agrobacterium rosae
- Agrobacterium rubi = Genomospecies 11 (G11)
- Agrobacterium skierniewicense
- Agrobacterium vaccinii
BV2
- BV2: Genomospecies 10 (G10), current name = Rhizobium rhizogenes
BV2-like
- Two different clades
- Clade 1: Rhizobium leucaenae
- Clade 2: Rhizobium freirei, Rhizobium tropici
BV3
- BV3: previously Agrobacterium vitis, now Allorhizobium spp. Narrow host range, limited to grapevine.
taxonomy.txt · Last modified: 2024/05/13 15:43 by chk