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

In the process of plant reproduction, when a pollen grain that transports male gametes lands on the stigma of another flower, it initiates the formation of a pollen tube.

From Science Daily ● May 21, 2024

This signal was emitted upon attracting a pollen tube, discouraging the further attraction of additional pollen tubes.

From Science Daily ● May 21, 2024

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

From Science Daily ● Apr. 16, 2024

When a pollen grain reaches the stigma, a pollen tube extends from the grain, grows down the style, and enters through the micropyle: an opening in the integuments of the ovule.

From Textbooks ● Jan. 1, 2015

Pollen was assumed to have germinated if the length of the pollen tube exceeded the diameter of the pollen grain.

From Northern Nut Growers Association Thirty-Fourth Annual Report 1943 by Northern Nut Growers Association