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pollen tube
noun
- the protoplasmic tube that is extruded from a germinating pollen grain and grows toward the ovule.
pollen tube
noun
- 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.
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Word History and Origins
Origin of pollen tube1
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Example Sentences
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.
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