Article CC BY 4.0
refereed
published

Diversity and Evolutionary History of Ti Plasmids of “tumorigenes” Clade of Rhizobium spp. and Their Differentiation from Other Ti and Ri Plasmids

GND
1139863959
ORCID
0000-0002-3635-6813
Affiliation
Julius Kühn-Institute (JKI), Institute for Plant Protection in Horticulture and Urban Green, Germany
Kuzmanović, Nemanja;
Affiliation
Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Germany
Wolf, Jacqueline;
Affiliation
Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Germany
Will, Sabine Eva;
GND
1058967878
ORCID
0000-0001-7653-5560
Affiliation
Julius Kühn-Institute (JKI), Institute for Epidemiology and Pathogen Diagnostics, Germany
Smalla, Kornelia;
ORCID
0000-0003-3889-6570
Affiliation
Department of Biology, Queen’s University, Kingston, Canada
diCenzo, George C.;
Affiliation
Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Germany
Neumann-Schaal, Meina

Agrobacteria are important plant pathogens responsible for crown/cane gall and hairy root diseases. Crown/cane gall disease is associated with strains carrying tumor-inducing (Ti) plasmids, while hairy root disease is caused by strains harboring root-inducing (Ri) plasmids. In this study, we analyzed the sequences of Ti plasmids of the novel “tumorigenes” clade of the family Rhizobiaceae (“tumorigenes” Ti plasmids), which includes two species, Rhizobium tumorigenes and Rhizobium rhododendri. The sequences of reference Ti/Ri plasmids were also included, which was followed by a comparative analysis of their backbone and accessory regions. The “tumorigenes” Ti plasmids have novel opine signatures compared with other Ti/Ri plasmids characterized so far. The first group exemplified by pTi1078 is associated with production of agrocinopine, nopaline, and ridéopine in plant tumors, while the second group comprising pTi6.2 is responsible for synthesis of leucinopine. Bioinformatic and chemical analyses, including opine utilization assays, indicated that leucinopine associated with pTi6.2 most likely has D,L stereochemistry, unlike the L,L-leucinopine produced in tumors induced by reference strains Chry5 and Bo542. Most of the “tumorigenes” Ti plasmids have conjugative transfer system genes that are unusual for Ti plasmids, composed of avhD4/avhB and traA/mobC/parA regions. Next, our results suggested that “tumorigenes” Ti plasmids have a common origin, but they diverged through large-scale recombination events, through recombination with single or multiple distinct Ti/Ri plasmids. Lastly, we showed that Ti/Ri plasmids could be differentiated based on pairwise Mash or average amino-acid identity distance clustering, and we supply a script to facilitate application of the former approach by other researchers.

Preview

Cite

Citation style:
Could not load citation form.

Access Statistic

Total:
Downloads:
Abtractviews:
Last 12 Month:
Downloads:
Abtractviews:

Rights

License Holder: The Author(s) 2023.

Use and reproduction: