pollen tube
Gamete delivery tunnel
A pollen tube is the slender outgrowth that emerges from a pollen grain after it lands on a flower's stigma.
The tube grows down through the style to reach the ovule, carrying sperm cells for fertilization.
This structure enables seed plants to reproduce without requiring water for sperm to swim through.
structure
Mark of dishonor
- styleDistinctive way of expression
- pistilSeed-producing flower organ
- ovaryFemale reproductive gland
- cell wallRigid cellular outer layer
cytoplasm · elongation · pectin · aperture · tubular
fertilization
Unfertilized seed structure
- egg cellFemale reproductive unit
- double fertilizationTwo simultaneous plant fusions
- zygoteFirst embryonic cell
- endospermSeed's internal nutrient tissue
botany
Plant producing flowers, fruits
- gymnospermExposed-seed plant
- gametophyteHaploid reproductive generation
- antherPollen-producing structure
- flowering plantSeed-in-fruit producer
stigma
Mark of dishonor
cell wall · cytoplasm · elongation · pectin · aperture · tubular
ovule
Unfertilized seed structure
- egg cellFemale reproductive unit
- double fertilizationTwo simultaneous plant fusions
- zygoteFirst embryonic cell
angiosperm
Plant producing flowers, fruits
- gymnospermExposed-seed plant
- gametophyteHaploid reproductive generation
- antherPollen-producing structure
tube, pollen, pollination, pollinator, pollinators, pollinated, pollinating, pollenate