What are root nodules? How are the helpful?
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Answer:
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The roots of leguminous plants bear nodules. Nitrogen fixing bacteria, Rhizobium resides inside these modules. Rhizobium can directly utilises atmospheric nitrogen and converts it into nitrogenous compounds like ammonia and nitrates. In this way plants get easy access to these chemicals which are good for plant growth. This is the reason that root nodules are useful for plants.
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Answer:
The roots having the irregular or the round mass or a lump called nodules within the cells are known as nodulated roots. The roots of leguminous plants possess these characteristic swelling nodules which are caused by colonies of nitrogen fixing bacteria (Rhizobium)
They contain symbiotic bacteria called rhizobia within the nodules, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants and this helps to fertilize the soil.
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