Stamen - Revision history

Prab: CSV import

2025-02-21T14:19:34Z

CSV import

← Older revision		Revision as of 14:19, 21 February 2025
Line 1:		Line 1:
	~~{{Short description\|Detailed description of the stamen, a key part of a flower's reproductive system}}~~		= Stamen =

	~~==Stamen==~~		[[File:Amaryllis_stamens_aka.jpg\|thumb\|right\|Stamens of an Amaryllis flower]]
	~~The '''stamen''' is the pollen-producing reproductive organ of a~~ [[~~flower]]~~. ~~It is typically composed~~ of ~~a stalk called the [[filament]] and~~ an ~~anther, where [[pollen]] is produced. Stamens are a crucial component of the [[androecium]], the male part of the~~ flower~~, and play a vital role in the process of [[pollination~~]].

	[[~~File:Stamen_diagram~~.~~svg\|thumb\|right\|Diagram~~ of a stamen ~~showing~~ the filament and anther.]]		The '''stamen''' is the pollen-producing reproductive organ of a [[flower]]. Collectively, the stamens form the ''androecium'' of a flower. The stamen typically consists of a stalk called the ''filament'' and an ''anther'', which contains [[microsporangia]].

	===Structure===		== Structure ==
	~~The stamen consists of two main parts:~~

	* '''Filament''': ~~The filament is a slender stalk that supports the anther~~. ~~It elevates the anther to~~ a ~~position where it can effectively release pollen to visiting [[pollinators~~]] ~~or the wind.~~		[[File:Stamen_(PSF).png\|thumb\|left\|Diagram of a stamen]]

	* '''Anther''': The anther is the terminal part of the stamen ~~and is responsible for the production and release of pollen. It typically~~ consists of two ~~lobes, each containing two pollen sacs where pollen grains develop.~~		A typical stamen consists of two main parts:

	~~===Function===~~		* '''Filament''': The filament is a slender stalk that supports the anther. It positions the anther in a way that facilitates the transfer of [[pollen]] to the [[pistil]] or to pollinators.
	The ~~primary function of~~ the ~~stamen is to produce and disperse pollen~~. ~~Pollen grains contain~~ the ~~male [[gametes]] necessary for [[fertilization]]~~ of ~~the female~~ [[~~ovule~~]]~~. During pollination, pollen is transferred from the anther~~ to the [[~~stigma~~]] ~~of a flower, either within the same flower~~ or ~~between flowers, leading~~ to ~~fertilization and the production of seeds~~.

	~~===Variations===~~		* '''Anther''': The anther is the part of the stamen where pollen is produced. It usually consists of two lobes, each containing two microsporangia. The microsporangia are the sites of pollen development.
	~~Stamens can vary greatly in number, size, and shape among different plant species~~. ~~Some flowers have a single stamen~~, ~~while others may have numerous stamens~~. The ~~arrangement and morphology of stamens can be important for~~ the ~~identification and classification~~ of ~~plants~~.

	* '''Monadelphous''': Stamens are united by their filaments into a single group.		== Function ==
	* '''Diadelphous''': Stamens are united into two groups.
	* '''Polyadelphous''': Stamens are united into more than two groups.

	~~===Role in Pollination===~~		The primary function of the stamen is to produce and release pollen. Pollen grains contain the male gametes necessary for [[fertilization]] in plants. During the process of [[pollination]], pollen is transferred from the anther to the stigma of a flower, leading to fertilization and the production of seeds.
	~~Stamens play a critical role in the pollination process.~~ The ~~position and structure~~ of the stamen ~~can influence~~ the ~~method~~ of pollination, ~~whether it be by wind~~, ~~insects, birds, or other animals. For example, flowers pollinated by insects often have stamens positioned~~ to ~~brush against~~ the ~~pollinator, ensuring effective pollen transfer~~.

	[[File:~~Bee_pollen~~.jpg\|thumb\|left\|~~A bee collecting~~ pollen from a flower.]]		== Variations ==

			[[File:Hippeastrum-1.jpg\|thumb\|right\|Stamens of a Hippeastrum flower]]

			Stamens can vary greatly in size, shape, and number among different plant species. Some flowers have a single stamen, while others may have numerous stamens. The arrangement and morphology of stamens can be important for the identification of plant species.

			== Development ==

			Stamens develop from the floral meristem and are considered modified [[leaves]]. During development, the stamen primordia differentiate into the filament and anther. The anther undergoes meiosis to produce haploid pollen grains.

			== Pollination ==

			[[File:Closeup_of_Lilium_'Stargazer'_(the_'Stargazer_lily').jpg\|thumb\|left\|Close-up of Lilium 'Stargazer' showing stamens]]

			Pollination is the process by which pollen is transferred from the anther to the stigma. This can occur through various mechanisms, including wind, water, and animal pollinators such as insects and birds. The structure and position of stamens can influence the method of pollination.

			== Related Structures ==

			[[File:Mature_flower_diagram.svg\|thumb\|right\|Diagram of a mature flower showing stamens]]

			* '''[[Pistil]]''': The female reproductive part of a flower, consisting of the stigma, style, and ovary.
			* '''[[Petal]]''': Often colorful parts of a flower that attract pollinators.
			* '''[[Sepal]]''': Protective leaf-like structures that enclose the flower bud.

			== Examples ==

			[[File:Antera_Lilium.jpg\|thumb\|left\|Anther of a Lilium flower]]

			* '''[[Lilium]]''': The lily flower has prominent stamens with large anthers that are often visible and produce abundant pollen.
			* '''[[Hippeastrum]]''': Known for its large, showy flowers with long stamens.
			* '''[[Phalaenopsis]]''': Orchids with unique stamen structures adapted for specific pollinators.

			== Related Pages ==

	~~==Related pages==~~
	* [[Pistil]]
	* [[Pollination]]		* [[Pollination]]
	* [[Flower]]		* [[Flower]]
	* [[Reproduction in plants]]		* [[Reproduction in plants]]

			[[File:Phalaenopsis_orchid-Stipe.jpg\|thumb\|right\|Stipe of a Phalaenopsis orchid]]

			== Gallery ==

			<gallery>
			File:Penta_anther.jpg\|Anther of a Penta flower
			</gallery>

	[[Category:Plant anatomy]]		[[Category:Plant anatomy]]
	[[Category:Reproductive system]]		[[Category:Reproductive system]]

Prab: CSV import

2025-02-18T17:42:13Z

CSV import

← Older revision		Revision as of 17:42, 18 February 2025
Line 1:		Line 1:
	'~~''Stamen'''~~		{{Short description\|Detailed description of the stamen, a key part of a flower's reproductive system}}

	The '''stamen''' is the pollen-producing reproductive organ of a flower. ~~Collectively~~ the ~~stamens form~~ the androecium.		==Stamen==
			The '''stamen''' is the pollen-producing reproductive organ of a [[flower]]. It is typically composed of a stalk called the [[filament]] and an anther, where [[pollen]] is produced. Stamens are a crucial component of the [[androecium]], the male part of the flower, and play a vital role in the process of [[pollination]].

	~~== Morphology and terminology ==~~		[[File:Stamen_diagram.svg\|thumb\|right\|Diagram of a stamen showing the filament and anther.]]
	~~A stamen typically consists~~ of a ~~stalk called~~ the filament and ~~an anther which contains microsporangia. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the~~ anther. ~~The sterile tissue between the lobes is called the connective.~~

	== ~~Function~~ ==		===Structure===
	~~A typical, entomophilous (insect-pollinated)~~ stamen consists of ~~a pollen-producing anther attached to a filament. The pollen is released when the anther's~~ two ~~lobes open up. This process is called dehiscence.~~		The stamen consists of two main parts:

	~~== Types of stamen ==~~		* '''Filament''': The filament is a slender stalk that supports the anther. It elevates the anther to a position where it can effectively release pollen to visiting [[pollinators]] or the wind.
	~~Stamens can be categorized in~~ a ~~number of ways:~~
	* By attachment to the ~~perianth~~
	* By number
	* By length
	* By anther ~~attachment~~
	* By anther ~~dehiscence~~
	* By pollen ~~release~~

	~~== Evolution ==~~		* '''Anther''': The anther is the terminal part of the stamen and is responsible for the production and release of pollen. It typically consists of two lobes, each containing two pollen sacs where pollen grains develop.
	The stamen is ~~thought to have originated in~~ the ~~sporangia~~ of ~~the ancient~~, ~~extinct group of plants known as the progymnosperms~~.

	== ~~See also~~ ==		===Function===
	* [[~~Androecium~~]]		The primary function of the stamen is to produce and disperse pollen. Pollen grains contain the male [[gametes]] necessary for [[fertilization]] of the female [[ovule]]. During pollination, pollen is transferred from the anther to the [[stigma]] of a flower, either within the same flower or between flowers, leading to fertilization and the production of seeds.
	* [[~~Anther~~]]
	* [[~~Filament~~]]		===Variations===
	* [[~~Flower~~]]		Stamens can vary greatly in number, size, and shape among different plant species. Some flowers have a single stamen, while others may have numerous stamens. The arrangement and morphology of stamens can be important for the identification and classification of plants.
	* ~~[[Pollen]]~~
			* '''Monadelphous''': Stamens are united by their filaments into a single group.
			* '''Diadelphous''': Stamens are united into two groups.
			* '''Polyadelphous''': Stamens are united into more than two groups.

			===Role in Pollination===
			Stamens play a critical role in the pollination process. The position and structure of the stamen can influence the method of pollination, whether it be by wind, insects, birds, or other animals. For example, flowers pollinated by insects often have stamens positioned to brush against the pollinator, ensuring effective pollen transfer.

	~~== References ==~~		[[File:Bee_pollen.jpg\|thumb\|left\|A bee collecting pollen from a flower.]]
	~~<references />~~

	== ~~External links~~ ==		==Related pages==
	* [~~http://www.britannica.com/EBchecked/topic/562618/stamen Britannica Online Encyclopedia~~]		* [[Pistil]]
			* [[Pollination]]
			* [[Flower]]
			* [[Reproduction in plants]]

	~~[[Category:Floral parts]]~~
	[[Category:Plant anatomy]]		[[Category:Plant anatomy]]
	[[Category:~~Plant reproduction~~]]		[[Category:Reproductive system]]
	~~{{stub}}~~
	~~<gallery>~~
	~~File:Amaryllis_stamens_aka.jpg\|Stamen~~
	~~File:Stamen_(PSF).png\|Stamen~~
	~~File:Hippeastrum-1.jpg\|Stamen~~
	~~File:Closeup_of_Lilium_'Stargazer'_(the_'Stargazer_lily').jpg\|Stamen~~
	~~File:Mature_flower_diagram.svg\|Stamen~~
	~~File:Antera_Lilium.jpg\|Stamen~~
	~~File:Phalaenopsis_orchid-Stipe.jpg\|Stamen~~
	~~File:Penta_anther.jpg\|Stamen~~
	~~File:Lily_stamens.jpg\|Stamen~~
	~~File:蘇利南合歡_Calliandra_surinamensis_20210529152746_02.jpg\|Stamen~~
	~~File:香蘋婆_Sterculia_foetida_20210409164154_01.jpg\|Stamen~~
	~~File:銀樺_Grevillea_robusta_20210411152016_14.jpg\|Stamen~~
	~~</gallery>~~

Prab: CSV import

2025-02-18T12:07:50Z

CSV import

← Older revision		Revision as of 12:07, 18 February 2025
Line 38:		Line 38:
	[[Category:Plant reproduction]]		[[Category:Plant reproduction]]
	{{stub}}		{{stub}}
			<gallery>
			File:Amaryllis_stamens_aka.jpg\|Stamen
			File:Stamen_(PSF).png\|Stamen
			File:Hippeastrum-1.jpg\|Stamen
			File:Closeup_of_Lilium_'Stargazer'_(the_'Stargazer_lily').jpg\|Stamen
			File:Mature_flower_diagram.svg\|Stamen
			File:Antera_Lilium.jpg\|Stamen
			File:Phalaenopsis_orchid-Stipe.jpg\|Stamen
			File:Penta_anther.jpg\|Stamen
			File:Lily_stamens.jpg\|Stamen
			File:蘇利南合歡_Calliandra_surinamensis_20210529152746_02.jpg\|Stamen
			File:香蘋婆_Sterculia_foetida_20210409164154_01.jpg\|Stamen
			File:銀樺_Grevillea_robusta_20210411152016_14.jpg\|Stamen
			</gallery>

Prab: CSV import

2024-02-25T18:49:56Z

CSV import

New page

'''Stamen'''

The '''stamen''' is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium.

== Morphology and terminology ==
A stamen typically consists of a stalk called the filament and an anther which contains microsporangia. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective.

== Function ==
A typical, entomophilous (insect-pollinated) stamen consists of a pollen-producing anther attached to a filament. The pollen is released when the anther's two lobes open up. This process is called dehiscence.

== Types of stamen ==
Stamens can be categorized in a number of ways:
* By attachment to the perianth
* By number
* By length
* By anther attachment
* By anther dehiscence
* By pollen release

== Evolution ==
The stamen is thought to have originated in the sporangia of the ancient, extinct group of plants known as the progymnosperms.

== See also ==
* [[Androecium]]
* [[Anther]]
* [[Filament]]
* [[Flower]]
* [[Pollen]]

== References ==
<references />

== External links ==
* [http://www.britannica.com/EBchecked/topic/562618/stamen Britannica Online Encyclopedia]

[[Category:Floral parts]]
[[Category:Plant anatomy]]
[[Category:Plant reproduction]]
{{stub}}

← Older revision		Revision as of 12:07, 18 February 2025
Line 38:		Line 38:
	[[Category:Plant reproduction]]		[[Category:Plant reproduction]]
	{{stub}}		{{stub}}
			<gallery>
			File:Amaryllis_stamens_aka.jpg\|Stamen
			File:Stamen_(PSF).png\|Stamen
			File:Hippeastrum-1.jpg\|Stamen
			File:Closeup_of_Lilium_'Stargazer'_(the_'Stargazer_lily').jpg\|Stamen
			File:Mature_flower_diagram.svg\|Stamen
			File:Antera_Lilium.jpg\|Stamen
			File:Phalaenopsis_orchid-Stipe.jpg\|Stamen
			File:Penta_anther.jpg\|Stamen
			File:Lily_stamens.jpg\|Stamen
			File:蘇利南合歡_Calliandra_surinamensis_20210529152746_02.jpg\|Stamen
			File:香蘋婆_Sterculia_foetida_20210409164154_01.jpg\|Stamen
			File:銀樺_Grevillea_robusta_20210411152016_14.jpg\|Stamen
			</gallery>