When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations,they abandon support of the nodules and end the symbiosis.Why?

Question

Quizplus · Accepted Answer

When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations, they abandon the support of the nodules and end the symbiosis as the plants can conserve valuable energy sources by terminating the symbiotic relationship. The plants no longer require the assistance of Rhizobium bacteria present in the nodules for nitrogen fixation and hence, they end this relationship. The other options are incorrect as mineral nutrients do not inhibit nitrogenase activity, nitrogen gas is still available in the soil, dissolved chemical nutrients are not toxic to Rhizobium bacteria and dissolved nitrogen does not uncurl the root hairs or release the nodule.

When Legumes with Nitrogen-Fixation Nodules Are Given Chemical Fertilizers with High