Filament
/ˈfɪləmənt/
Definition
Filament refers to the slender stalk of a stamen, the male reproductive part of a flower. It supports the anther, which produces and releases pollen. Together, the filament and anther make up one stamen. Filaments are usually thin and threadlike, but their length, shape, and attachment can vary among plant species and help position the anther for effective pollen transfer.
Function in Plants
- Pollen presentation: In most flowers, the filament positions the anther so pollen is exposed where wind or pollinators can pick it up more easily.
- Aid to species identification: Length, hairiness, fusion, and attachment can help botanists tell species or plant families apart, especially when flowers look otherwise similar.
- Movement and timing: In some plants, the filament bends or elongates as the flower opens, changing where the anther sits and improving the timing of pollen release.
- Part of the male floral unit: Together with the anther, it forms the stamen, so its form affects how the flower functions during pollination and fertilization.
Related Terms
Stamen
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Flower
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Pollen
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Theca
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Pistil
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