Question

The hormone that induces the formation of root nodules in Leguminous plants during nitrogen fixation:

• A. Auxin
• B. Dormin
• C. Cytokinin
• D. Gibberellin

Answer 1

Answer:

A. Auxin

Auxin is the plant hormone that induces the formation of root nodules in leguminous plants during nitrogen fixation The process of forming nitrogen-fixing nodules in legumes and their symbiotic partners, rhizobia bacteria, is called nodulation. It is an energetically expensive process, so the number of nodules must be strictly regulated.