During the initiation of nitrogen-fixation nodules,how do the Rhizobium bacteria enter into the cortex of the root?

Question

Quizplus · Accepted Answer

Rhizobium bacteria enter the root cortex through a membrane tube called an infection thread. This thread is formed by invagination of the plasma membrane of the root hair cells where the bacteria reside. The bacteria then multiply and form the nodule within the root cortex.

During the Initiation of Nitrogen-Fixation Nodules,how Do the Rhizobium Bacteria