Phototropic and geotropic movements are linked to

Gibberelins

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Cytokinins

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Auxin

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None of the above

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Solution

The correct option is A Auxin
Auxin is a plant hormone which plays important role in plant growth movement like phototropism and geotropism. In phototropism, plant stem bends towards the light as it has the least amount of auxin. The shaded side contains high amount of auxin and helps in elongation. In geotropism, auxin triggers downward growth of roots. High concentration of it inhibits cell elongation in roots.
Thus, the correct answer is option C.

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Similar questions

Phototropic movement of shoot and geotropic movement of root are called growth movements in plants.

Stems are :

(a) positively geotropic and negatively phototropic

(b) positively geotropic and positively phototropic

(d) negatively phototropicand positively geotropic

Name the plant organs which are :
(a) positively phototropic
(b) positively geotropic
(c) negatively geotropic
(d) positively hydrotropic

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