Question

examples of chemotropism other than pollen grain one.

Answer 1

the growth of a plant part due to chemical stimulus is known as chemotropism. the growth or a movement of a pollen tube towards the ovule induced by a sugary substance as stimulus is an example of chemotropism this can be explained as follows :The ripe stigma in carpel towards the ovule .This sugary substance acts as a stimulus for the pollen grains responds to this stimulus by growing a pollen tube in a downward direction into the style of carpel and reaches the ovule in the ovary of the flower for carrying out fertilisation. this growth of the pollen tube in response to a chemical substance secreted by the stigma of a flower is an example of chemotropism.