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  • Which one of the following plant hormones uses the two component histidine kinase receptor system for signal transduction?  <st

Which one of the following plant hormones uses the two component histidine kinase receptor system for signal transduction?

 

Option: 1

Auxin


Option: 2

Gibberellin


Option: 3

Cytokinin


Option: 4

Abscisic acid


Answers (1)

best_answer

Cytokinin is a plant hormone that utilises the two-component histidine kinase receptor system for signal transduction.

The two-component signalling pathway is a common mechanism used by plants to respond to environmental stimuli. In this system, a histidine kinase receptor located in the plant cell membrane perceives the cytokinin signal. Upon cytokinin binding to the receptor, it activates the histidine kinase, leading to autophosphorylation of a histidine residue within the kinase domain.

The phosphorylation event then triggers a downstream signalling cascade, which often involves the transfer of the phosphoryl group to a response regulator protein. This response regulator can then modulate gene expression or other cellular processes, allowing the plant to respond to the cytokinin signal and regulate various physiological and developmental processes.

Therefore, cytokinin is the plant hormone that utilises the two-component histidine kinase receptor system for signal transduction.Hence, the correct answer is option 3.

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Gaurav

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