*Azotobacter* is a genus of free-living, aerobic bacteria that can fix atmospheric nitrogen into ammonia, making it available to plants. They are commonly found in soil and water, and they can form symbiotic relationships with various plants, including grasses, cereals, and even some trees.
Here are a few other nitrogen-fixing bacteria associated with non-leguminous plants:
* *Azospirillum*: A genus of bacteria known to promote plant growth by fixing nitrogen and producing phytohormones.
* *Cyanobacteria*: These are photosynthetic bacteria that can fix nitrogen. Some species form symbiotic relationships with plants, such as ferns and cycads.
* *Frankia*: A genus of nitrogen-fixing bacteria that form symbiotic relationships with actinorhizal plants (non-leguminous plants that can fix nitrogen).
It's important to note that while these bacteria can fix nitrogen, they might not be as efficient as the symbiotic relationships between legumes and rhizobia. However, they play a crucial role in the nitrogen cycle and contribute to the overall health of ecosystems.
