Question

how are the steps involved in formation of root nodule

Answer 1

Rhizobium bacteria division and form colonies,and attached to root hair and root hair invadad by bacteria . bacteria get modified in to rod shaped bacteroides



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Answer 2

Answer:

Formation of nodules involves following steps:

• Rhizobia colonise the roots and get attached to epidermal and root hair cells.

• Bacteria invade the root hair and make it curled.

• Curling produces an infection thread which carries bacteria into the cortex of the root.

• Roots nodules are formed at the cortex of the root.

• When infected thread carries the bacteris to the inner cortex, it modifies the bacteria into rod-shaped bacteroids . It causes inner cortical and pericycle cells to undergo division. The division and growth of cortical and pericycle cells result in nodule formation

• The vascular tissue continues with that of the root, then a mature nodule is complete