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

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

Further analysis showed the complexity of the one-to-one pollen tube guidance process, revealing anintricate regulatory mechanism that requires the involvement of various cells in both male and female plants.

From Science Daily • May 21, 2024

The reverse genetic search showed the ETH researchers that the two genes control the growth of the pollen tube.

From Science Daily • Apr. 16, 2024

Mature pollen grains contain two cells: a generative cell and a pollen tube cell.

From Textbooks • Jan. 1, 2015

In general the pollen tube grew up into the air away from the surface of the agar, rather than down into it or parallel with the surface as in normal germination.

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