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In angiosperms the pollen tube germinates from the pollen grain and grows the entire length through the Stigma_(botany), Style_(botany), Ovary_(botany) and Ovulesto reach the eggs. In Maize, this single cell can grow longer than 12 inches to traverse the length of the pistil. The sperm cells by themselves are not motile and are carried within the tube. As the tip of the tube reaches a synergid, it bursts and releases two sperm cells leading to a double fertilization. One sperm unites with the egg cell to produce the embryo of a new plant, while a second sperm unites with the central cell(polar nuclei) to produce the Endospermof the seed. The endosperm is rich in starch, proteins and oils and is a major source of human food (e.g., wheat, barley, rye, oats, corn)

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Does pollen tube grow before or after pollination occurs?

Pollen tube growth occurs after pollination. Pollen grains are deposited on the stigma during pollination, which then germinate to produce pollen tubes. These tubes grow down through the style to reach the ovule for fertilization.


Where the pollen tube grow to or through?

The pollen tube grows out of or through the pollen grain.


What are the steps of pollination to the point that the seed is formed?

-pollen sticks to the stigma at the end of the pistil -pollen tubes grow down the pistil to the egg cells -sperm cells from the pollen moves down the tubes -fertilization combines DNA


Do all pollen tubes reach the ovule?

No, not all pollen tubes reach the ovule. After pollination, multiple pollen tubes may grow down the style, but typically only one successfully penetrates the ovule to deliver sperm cells for fertilization. The competition among pollen tubes ensures that the most viable one reaches the ovule, while others may abort or be blocked along the way.


What is the function of the pollen tubes?

it sucks


What happens from the time pollen lands on the female part of the flower until the seed forms?

-pollen sticks to the stigma at the end of the pistil -pollen tubes grow down the pistil to the egg cells -sperm cells from the pollen moves down the tubes -fertilization combines DNA


How does the pollen grains tube reach the ovary?

Pollen tubes are extensions of pollen grains that grow and elongate to penetrate the ovary. They are guided by chemical signals released by the ovary, which direct the path of the pollen tube towards the ovule where fertilization can occur.


What is the function of the style in the flower?

The style in a flower is part of the female reproductive structure that connects the ovary to the stigma, allowing pollen to reach the ovules for fertilization. It plays a crucial role in the pollination process by providing a pathway for pollen tubes to grow and facilitate fertilization.


How do two plants fertilize?

By sending their male gametes to the female gametes through their pollen tubes after germination of pollen grains.


On a flower what moves down to the ovary?

The male gametes in the pollen tubes.


Which part of the flowers do pollen tubes start to develop?

On the stigma of the carpel


Where does fertilization take place in conifer?

In the female ovary