Question

what is the stimuli and response in chemotropism ?
Where will the pollen tube reach finally?Why is this tropism important for the flower.

Answer 1

Explanation:

chemotropism 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.

In flowering plants each pollen tube penetrates the tissues of stigma and style into the ovary where it grows towards an ovule, passing down the micropyle to the nucellus and finally penetrating into the embryo sac.

Chemotropism – It is the movement of plants in response to a chemical stimulus. A classic example of this type of movement is the growth of the pollen tube towards the ovule, during fertilization, in a flower.