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Question
Knot like bodies known as "nodules" found in the root of groundnut plant are produced by :
Knot like bodies known as "nodules" found in the root of groundnut plant are produced by :
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Solution
The correct option is D Azotobacter
Ground nut is a leguminous crop. Rhizobium are rod shaped gram negative bacteria, whose infection in roots causes nodule formation in roots of leguminous plants.
Azospirillum and Acetobacter are also important nitrogen fixers but they are not associated with roots of leguminous plants. Azotobacter is free living and Azospirillum is associated with roots of grasses. Pseudomonas is a denitrifying bacteria.
So, the correct answer is 'Rhizobium'
Ground nut is a leguminous crop. Rhizobium are rod shaped gram negative bacteria, whose infection in roots causes nodule formation in roots of leguminous plants.
Azospirillum and Acetobacter are also important nitrogen fixers but they are not associated with roots of leguminous plants. Azotobacter is free living and Azospirillum is associated with roots of grasses. Pseudomonas is a denitrifying bacteria.
So, the correct answer is 'Rhizobium'
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