Fertilization
The gametes that participate in fertilization of plants are the sperm (male), and the egg cell, and in flowering plants a second fertilization event involves another sperm cell and the central cell which is a second female gamete. In flowering plants there are two sperm from each pollen grain.
In seed plants, after pollination, a pollen grain germinates, and a pollen tube grows and penetrates the ovule through a tiny pore called amicropyle. The sperm are transferred from the pollen through the pollen tube.