Rhizobium bacteria
Key Points:
- Rhizobium bacteria are a type of soil bacteria that form a symbiotic relationship with leguminous plants.
- They play a crucial role in nitrogen fixation, which is the process of converting atmospheric nitrogen into a form that plants can use.
- The bacteria enter the roots of leguminous plants and form nodules, which are specialized structures where nitrogen fixation occurs.
- Inside the nodules, the bacteria convert atmospheric nitrogen into ammonia, which is then utilized by the plants for their growth and development.
- This symbiotic relationship benefits both the bacteria and the plants, as the bacteria receive nutrients from the plants while providing them with a vital nutrient.
- In addition to nitrogen fixation, Rhizobium bacteria also contribute to soil fertility by improving soil structure and nutrient availability.
- They can enhance plant growth and productivity by facilitating the uptake of other essential nutrients, such as phosphorus and potassium.
- Rhizobium bacteria are not known to cause any diseases in humans or animals.
- However, it is important to note that there are other bacteria that can cause diseases in plants, but Rhizobium bacteria are not among them.
Conclusion:
- Rhizobium bacteria are beneficial soil bacteria that play a crucial role in nitrogen fixation and plant growth.
- They form a symbiotic relationship with leguminous plants, contributing to their nitrogen requirements and overall productivity.
- Rhizobium bacteria do not cause diseases and are instead important contributors to soil fertility and agricultural sustainability.

Help in nitrogen fixation option b) is the answer