Explain the development of root nodules in Soyabean.
Answer»
Nodule formation involves a sequence of multiple interactions between Rhizobium and roots of the host plant.
Rhizobium bacteria contact a susceptible root hair, Divide near it.
Upon successful infection of the root hair cause it to curl.
Infected thread carries the bacteria to the inner cortex. The bacteria get modified into rod shaped bacteroids and cause inner cortical and pericycle cells to divide. Division and growth of cortical pericycle cells lead to nodule formation.
A mature nodule is complete with vascular tissues continues with those of the root.