Mesorhizobium onobrychidis

Mesorhizobium onobrychidis

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Legend. Image credit: Name or Publication.

Classification

Domain: Bacteria

Phylum: Pseudomonadota

Class: Alphapoteobacteria

Order: Hyphomicrobiales

Family: Phyllobacteriaceae

Species

NCBI: [1]

Genus species

Description and Significance

Mesorhizobium onobrychidis is part of the genus, Mesorhizobium, which are gram negative bacteria that live in tropical, temperate, sub-tropical, and arctic soils. M. onobrychidis induces plant legume nodules and assists the plant with nitrogen and carbon dioxide fixation. Though it is very similar to other species in its genus, it has one of the largest strains and highest number of genes that code for these specific functions: biofertilization, phytohormone, plant signal production, stress resistance, competitive exclusion, and plant immune response stimulation. This species directly affects plant growth performance.

Genome Structure

This species contains a unique genomic island and has a high density of symbiotic genetic traits. The complete genome size is 7.55 Mb and the circular chromosome is 7.32 Mb and contains one circular plasmid of 227 kb. The guanine-cytosine composition contains a large genomic island of 61.9%. It contains 414 genes and multiple gene clusters that are similar to other Mesorhizobium strains. There are a total of 2,683 core, 1,151 accessory, 2,444 cloud, and 1,068 unique genes. Mesorhizobium onobrychidis has approximately 2.5 times more genes than any other Mesorhizobium strains on average.

Cell Structure, Metabolism and Life Cycle

Interesting features of cell structure; how it gains energy; what important molecules it produces.

Ecology and Pathogenesis

Habitat; symbiosis; biogeochemical significance; contributions to environment.

If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.

References

[Ashrafi, S., Kuzmanović, N., Patz, S., Lohwasser, U., Bunk, B., Spröer, C., Lorenz, M., Elhady, A., Frühling, A., Neumann-Schaal, M., Verbarg, S., Becker, M., & Thünen, T. (2022). Two New Rhizobiales Species Isolated from Root Nodules of Common Sainfoin (Onobrychis viciifolia) Show Different Plant Colonization Strategies. Microbiology spectrum, 10(5), e0109922. https://doi.org/10.1128/spectrum.01099-22

Loranjo M, Alexandre A, Oliveira S. (2014). Legume growth-promoting rhizobia: An overview on the Mesorhizobium genus. Microbiological Research. 169(1): 2-17.

LPSN. (n.d.). Species Mesorhizobium Onobrychidis. Species: Mesorhizobium onobrychidis. https://lpsn.dsmz.de/species/mesorhizobium-onobrychidis

Author

Page authored by Amaya Pitts, student of Prof. Bradley Tolar at UNC Wilmington.