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Science


Control in Plants


Plants are sensitive to light, moisture and gravity. Therefore when a plant

grows it will try to grow towards the light, and towards water. Sometimes

gravity can help the plant achieve this.

 

Plants growing with the light are known as phototropism, whereas a plant

growing with gravity is called geotropism. Different part of the plant will

respond to different things.The stem will respond to light but will not respond

to gravity. Therefore this is knows as positive phototropism and negative

geotropism.

 

The root of the plant is the opposite of the stem. It responds to gravity but

does not respond to light, as it is underground.Therefore it is knows as a

positive geotropism and negative geotropism.

 

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