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pollen tube
noun
, Botany.
- 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
First recorded in 1825–35
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Example Sentences
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.
From Project Gutenberg
I spent pretty well the whole day over them, and got three, and several in the pollen tube, not yet quite ripe.
From Project Gutenberg
This embryo is the product of fertilization of a germinal vesicle by a pollen tube.
From Project Gutenberg
The branches of the stigma are very thin, formed apparently of three rows of cells of hardly greater diameter than pollen-tube.
From Project Gutenberg
Each ovule, which is reached by a pollen tube, swells up and becomes a seed.
From Project Gutenberg
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