Rhizobium leguminosarum strain SM151B frag_SM151B_25

Rhizobium leguminosarum strain SM151B (accession SIPS00000000.1) is a Gram-negative, mesophilic bacterium that plays a crucial role in the nitrogen-fixing symbiotic relationship with various legumes. This strain typically inhabits soil environments and exhibits a rod shape with a single-cell arrangement. As a chemoheterotroph, it derives energy from organic compounds, utilizing oxygen as an aerobe, and possesses flagella that enable mobility. Strain SM151B is nonsporulating and contains a single replicon with a double membrane structure, characteristic of its Gram-negative classification. It forms symbiotic associations with several host plants, including Lens culinaris (lentils), Trifolium species (such as Trifolium ambiguum, Trifolium pratense, Trifolium rubens, and Trifolium repens), Vavilovia formosa, Medicago sativa (alfalfa), and Lathyrus oleraceus (grass pea). These associations are vital for enhancing soil fertility, as the bacterium converts atmospheric nitrogen into a biologically usable form for its leguminous hosts, which in turn benefit from improved nutrient availability. The ecological significance of Rhizobium leguminosarum strain SM151B lies in its ability to promote plant growth and contribute to sustainable agricultural practices through nitrogen fixation. By establishing symbiotic relationships with various legumes, this strain not only supports the growth of its host plants but also enriches soil fertility, demonstrating the importance of microbial interactions in maintaining ecosystem health and productivity.