b) Upon pollination to the pistil, the pollen tube grows from pollen towards the ovule. Once the pollen tube reaches the ovule, the tube bursts releasing PTCs and two sperm cells that can ...

It begins when a pollen grain that carries the sperm cells lands on the top of the pistil, the female reproductive structure ... picking up signals along the way that reveal the location of an ovule.

When pollen grains alight on a pistil (female reproductive organ), they grow tubes that burrow toward the egg, following attractants released from the flower’s ovule. Researchers at Brown University ...

"In barley, the female reproductive organ is called the pistil; it starts preparing for ... to prevent the expression of seed ...