Rhizobium leguminosarum strain SM19 frag_SM19_33

Rhizobium leguminosarum strain SM19 (frag_SM19_33) is a Gram-negative, mesophilic, rod-shaped bacterium that thrives in soil environments. This strain is classified as a chemoheterotroph, utilizing organic compounds as its energy source. Its cellular arrangement consists of single cells, and it exhibits mobility due to the presence of flagella. As an aerobic organism, it requires oxygen for its metabolic processes. Strain SM19 is nonsporulating and possesses a single replicon with a double membrane structure, which is characteristic of Gram-negative bacteria. This strain engages in symbiotic relationships with several leguminous host plants, including Lens culinaris (lentils), Trifolium species (clovers), Vavilovia formosa, Medicago sativa (alfalfa), and Lathyrus oleraceus (grass pea). The ability to form symbiosis with these plants highlights its ecological importance, as it facilitates nitrogen fixation, enriching soil fertility and promoting sustainable agricultural practices. The presence of R. leguminosarum strain SM19 in agricultural ecosystems can enhance plant growth and yield, particularly in leguminous crops. By fixing atmospheric nitrogen, this strain contributes significantly to soil nitrogen levels, benefiting both the host plants and the overall health of the soil ecosystem. Its specific interactions with a diverse range of legumes underline its role in promoting biodiversity and supporting agroecological resilience.