Question

What is chemotropism ? Give one example of the phenomenon

Answer 1

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The growth of a plant part due to chemical stimulus is known aschemotropism. For example the growth of pollen tube towards the ovule induced by a sugary substance as stimulus. This is an example of positive chemotropism.
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Answer 2

The growth or movement of a plant or plant part in response to a chemical stimulus.
An example is the growth of a pollen tube down the style during fertilization in response to the presence of sugars in the style.