Pollen−Pistil Interactions

 Pollination does not always ensure the transfer of compatible pollens.

Hence, the pistil has the ability to recognise the right type of pollen to promote post- pollination events.

If the pollen is of the wrong type, the pistil prevents pollen germination.

This interaction is mediated by chemical components of the pollen and the pistil.

Pollen−pistil interaction is a dynamic process involving pollen recognition, followed by promotion or inhibition of the pollen.

The pollen tube reaches the ovary and enters the ovule through the micropyle.

Then, through the filiform apparatus, it reaches synergids.

In this way, the pollen tube grows.