The role of egg flagella in the settlement and development of zygotes in two Saccharina species

The settlement of zygotes in the right place is the most critical step for the survival of young kelp sporophytes in the marine environment. The eggs of Saccharina species were connected to oogonia with two flagella projected from its basal part, and this connection lasted even after fertilisation and first cell division of the zygote. Transmission electron microscopy showed that the egg flagella have a unique structure and arrangement of basal...