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  • Which of the following plant hormones can mimic the det1 mutation, causing de-etiolation and chloroplast development in the dark?  Option: 1

Which of the following plant hormones can mimic the det1 mutation, causing de-etiolation and chloroplast development in the dark?
 

Option: 1

Cytokinin


Option: 2

Gibberellin


Option: 3

Auxin

 


Option: 4

Ethylene


Answers (1)

best_answer

The det1 mutation in plants disrupts the normal light signaling pathway, leading to a constitutive photomorphogenic phenotype even in the absence of light. In this mutation, plants exhibit characteristics of light-grown plants, such as de-etiolation (greening) and chloroplast development, even in darkness.

Cytokinin is a plant hormone that regulates various physiological processes, including cell division, shoot initiation, and differentiation. It has been shown that exogenous application of cytokinins can mimic the det1 mutation, leading to de-etiolation and chloroplast development in the dark. Cytokinins promote chloroplast development and delay chloroplast senescence, which contributes to the greening effect observed.

Therefore, cytokinins can induce similar effects as the det1 mutation, causing de-etiolation and chloroplast development in the absence of light. Hence, the correct answer is option 1.

Posted by

SANGALDEEP SINGH

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