Pollen tube contents (PTC) are the liquid part of the pollen tube, shown in yellow. b) Upon pollination to the pistil, the pollen tube grows from pollen towards the ovule. Once the pollen tube ...

It begins when a pollen grain that carries the sperm cells lands on the top of the pistil, the female reproductive structure of a flower. The pollen grain then germinates into a tube that guides the ...

There’s no need to call the fire department. This fiery column is merely the top of a flower’s pistil. The orange structures you see within the blue outline are called xylem. There’s no need to call ...