pollen tube

American  

noun

Botany.

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

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pollen tube British  

noun

1. 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

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pollen tube Scientific  

1. 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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Etymology

Origin of pollen tube

First recorded in 1825–35

Example Sentences

See Examples For:

pollen tube

The reason is that the pollen tube in these plants grows incorrectly, which keeps fertilization from taking place.

From Science Daily ● Apr. 16, 2024

The ETH researchers have observed that in newly formed polyploid plants, the pollen tube does not grow straight, nor is it sufficiently long.

From Science Daily ● Apr. 16, 2024

"We're currently investigating other gene candidates that are also involved in pollen tube growth," Bomblies says.

From Science Daily ● Apr. 16, 2024

Each pollen grain contains two cells: one generative cell that will divide into two sperm and a second cell that will become the pollen tube cell.

From Textbooks ● Jan. 1, 2015

By carefully opening the ovary and slightly crushing it in a drop of water, the pollen tube may sometimes be seen growing along the stalk of the ovule until it reaches and enters the micropyle.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton