Bradyrhizobium

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Bradyrhizobium is a genus of Gram-negative soil bacteria that naturally occur as free-living soil bacteria or in symbiotic relationships with legumes. Bradyrhizobium is known for nitrogen fixation, which converts atmospheric nitrogen into ammonia (N₂ - NH₃). This process allows plants and other organisms to use organic compounds, such as nitrates, more readily.^[1][2] Nitrogen-fixing bacteria such as Bradyrhizobium are crucial to chemical cycles in the soil.

1. ↑ Wagner, S. C.. (2011) Biological Nitrogen Fixation. Nature Education Knowledge 3(10):15
2. ↑ Wongdee, J., Boonkerd, N., Teaumroong, N., Tittabutr, P., & Giraud, E. (2018). Regulation of Nitrogen Fixation in Bradyrhizobium sp. Strain DOA9 Involves Two Distinct NifA Regulatory Proteins That Are Functionally Redundant During Symbiosis but Not During Free-Living Growth. Frontiers in microbiology, 9, 1644. https://doi.org/10.3389/fmicb.2018.01644