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Question
Phototropic movements of roots and stems are due to:
Phototropic movements of roots and stems are due to:
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Solution
The correct option is C Differential hormonal effect
Phototropic movements of roots and stems are due to differential hormonal effects. Several plant hormones can also be called phytohormones for the nastic and tropic movements of plants. For instance - auxin; The plant hormone auxin is responsible for a plant's ability to grow towards the light. Movements of roots and stems due to the action of gravity are known as geotropism. Epinasty: a nastic movement in which a plant part (as a flower petal) is bent outward and often downward. Hyponasty: a nastic movement in which a plant part is bent inward and upward.
Phototropic movements of roots and stems are due to differential hormonal effects. Several plant hormones can also be called phytohormones for the nastic and tropic movements of plants. For instance - auxin; The plant hormone auxin is responsible for a plant's ability to grow towards the light. Movements of roots and stems due to the action of gravity are known as geotropism. Epinasty: a nastic movement in which a plant part (as a flower petal) is bent outward and often downward. Hyponasty: a nastic movement in which a plant part is bent inward and upward.
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