Consider the following statements regarding nitrogen nutrition of plants Green plants can fix n...........

General Science (Easy) Biology

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Consider the following statements regarding nitrogen nutrition of plants:

Green plants can fix nitrogen from the atmosphere into nitrates
Only a few prokaryotes can fix atmospheric nitrogen into nitrates
The problem of nitrogen fertilizers could be reduced if Rhizobium can be grown in the roots of cereal plants
Legumes do not require nitrogen fertilizers

Which of the above statements are correct?

1, 2 and 4

2, 3 and 4

3 and 4

1, 2, 3 and 4

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Explanation:

Green plants have no role in Nitrogen fixation. It can be accomplished in three different ways:

By microorganisms (bacteria and blue-green algae),
By man using industrial processes (fertiliser factories) and
To a limited extent by atmospheric phenomena such as thunder and lighting

For Statement 3 and 4, Rhizobium is a bacteria found in soil that helps in fixing nitrogen in leguminous plants. It attaches to the roots of the leguminous plant and produces nodules. These nodules fix atmospheric nitrogen and convert it into ammonia that can be used by the plant for its growth and development.