pollen tube

(redirected from Pollen tubes)
Also found in: Thesaurus, Medical, Encyclopedia.

pollen tube

n.
A slender tube that is formed by a pollen grain of a seed plant and penetrates the ovule, where it releases the male gametes.

pollen tube

n
(Botany) 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

pol′len tube`



n.
the tube that forms from a germinating pollen grain and grows toward the ovule, carrying male gametes with it.
[1825–35]

pollen tube

The slender tube formed by the pollen grain that penetrates an ovule after pollination and releases the male gametes.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pollen tube - (botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flowerpollen tube - (botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule
phytology, botany - the branch of biology that studies plants
plant part, plant structure - any part of a plant or fungus
References in periodicals archive ?
Flowers grew more pollen tubes as the team drew out more nectar, suggesting the plants use a bird's guzzle rate to recognize preferred pollinators.
The Chi-Square test was performed using Spss 16 software to determine significant difference between phenotypic groups of pollen tubes and treatments.
inhibits the growth of genetically matching pollen tubes (Luu et al.
Even more remarkable is the microscopic image of pollen tubes growing out of two grains of pollen and penetrating the flower's stigma, the receptive part of the female reproductive system.
The study of calcium ion and pH oscillation in both pollen tubes and root hairs has led to a greater understanding of what regulates root tip growth.
In maize, pollen tubes can grow through a style of as much as 50 cm length at rates close to 1 cm/hour (Barnabas & Fridvalszky, 1984).
Microscopic studies (De Proft, 2002) have shown later pollen tubes can take advantage of earlier tubes; physically as it allows a "path" and chemically as the earlier tubes mask the pollen's chemical signature, allowing less compatible pollen to sneak past the pistol's defences; hence the basis for "mentor pollen" i.
Conifer pollen tubes are an interesting model system to study polarized cell growth.
If this same scheme operates in pollen tubes, such signaling might help guide the pollen tube.
When germination occurs it is quite striking, with long pollen tubes -- sometimes traversing the entire field of view -- extending from each grain.
Three adjacent stigmatic chambers provide growing pollen tubes access to one ovary; the remaining two stigmatic chambers provide pollen tube access to the second ovary (Sage et al.
In plant studies, Lankinen has found, a batch of pollen from multiple sires starting pollen tubes all at once led to more seeds from more sires than did comparable pollen delivered over two days.