pollen tube

noun

, Botany.

the protoplasmic tube that is extruded from a germinating pollen grain and grows toward the ovule.

pollen tube

a hollow tubular outgrowth that develops from a pollen grain after pollination, grows down the style to the ovule, and conveys male gametes to the egg cell

pollen tube

The slender tube that is formed after pollination by division of the tube cell in a pollen grain. The pollen tube penetrates the ovule and releases the male gametes.

First recorded in 1825–35

If it does, the silk grows a pollen tube, enabling the male genes to travel towards the ovule and fertilize it.

And he observed the extension of the embryo-sacs up the style and the union of the pollen tube with the tip of the embryo-sac.

I spent pretty well the whole day over them, and got three, and several in the pollen tube, not yet quite ripe.

This embryo is the product of fertilization of a germinal vesicle by a pollen tube.

The branches of the stigma are very thin, formed apparently of three rows of cells of hardly greater diameter than pollen-tube.

Each ovule, which is reached by a pollen tube, swells up and becomes a seed.

April 18, 2024petrichor

[pet-ri-kawr]

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