Phototropism Movement


 
 
Concept Explanation
 

Phototropism Movement

It  is the tropic response of organisms to light. When a young green plant receives light from one direction only, the stem grows towards the light source. The stem is said to be positively phototropic because the stem tip grows in the direction of light. Sunflower buds exhibit a special type of phototropism in which the buds turn slowly through the day so that they always face the sun. This movement is caused by turgor changes.

How phototropism occurs ?

It is the directional movement of a plant in response to light. The shoot responds by bending towards light and roots respond by bending away from light. This happens as;

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Sample Questions
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Question : 1

A potted plant is kept in a card board box with a small slit of sun light exhibits __________________

Right Option : A
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Question : 2

The bending of stem towards light occur due to the movement of which hormone?

Right Option : C
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Question : 3

Phototropism is  a type of 

Right Option : B
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