Hormone involved in phototropism is ____________.

IAA

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gibberellin

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kinetin

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2, 4-D.

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Solution

The correct option is A IAA
Phototropic curvature is the result of uneven distribution of auxin. Darwin and Darwin observed that the coleoptiles of canary grass responded w unilateral illumination by growing towards the light source (phototropism). After a series of experiments, It was concluded that the tip of coleoptile contains auxin that caused the bending of the entire coleoptile in relation to the direction of light.

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Similar questions

One of the following plant hormones is responsible for the phenomenon of phototropism in plants. This is :

(a) giberellin

(b) eltroxin

(d) auxin

_________ is a gaseous hormone and is involved in abscission of organs and acceleration of fruit ripening.

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