pistil


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pistil

(pĭs`tĭl), one of the four basic parts of a flowerflower,
name for the specialized part of a plant containing the reproductive organs, applied to angiosperms only. A flower may be thought of as a modified, short, compact branch bearing lateral appendages.
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, the central structure around which are arranged the stamens, the petals, and the sepals. The pistil is usually called the female reproductive organ of a flowering plant, although the actual reproductive structures are microscopic. The pistil has a bulbous base (the ovary) containing the ovules, which develop into seeds after fertilization of egg cell(s) in the ovule. A pistil is composed of one or more highly modified leaves (carpels), each containing one or more ovules. A flower may have one or more simple pistils, each a separate organ, or, in higher orders, a compound pistil, formed of several fused carpels. Usually, there is above the ovary a stalk (the style) bearing on its tip the stigma, where the pollen grains land and germinate (see pollinationpollination,
transfer of pollen from the male reproductive organ (stamen or staminate cone) to the female reproductive organ (pistil or pistillate cone) of the same or of another flower or cone.
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). The stigma is often sticky or hairy, to retain the pollen. Evolutionary relationships can often be inferred from the location of the ovary in relation to the other parts of the flower. If the stamens, petals, and sepals are attached beneath the ovary, the flower is hypogynous and the ovary is superior; if they are attached above, the ovary is inferior and the flower epigynous; if the ovary is located in a receptacle at the outer edges of which are attached the other flower parts, it is called superior or half-inferior and the flower perigynous. A flower that has one or more pistils but no stamens (or nonfunctional ones) is called pistillate, or female, as distinguished from a staminate, or male, flower, in which the pistil is nonfunctional or absent.

Pistil

 

the reproductive organ of a flower. The pistil, which is located in the center of the flower, typically consists of a hollow and enlarged inferior part—the ovary, a slender and usually cylindrical style or a stylodium, and a stigma. The stigma usually crowns the style or stylodia. If the stylodia are reduced, the stigma sits directly on the ovary. The ovary contains ovules, from which seeds develop after fertilization. The pericarp develops from the walls of the ovary. Thus, the pistil as a whole participates in formation of the fruit. Many botanists consider the term “pistil” to be superfluous because it is synonymous with the apocarpous gynoecium (a simple pistil formed from a single carpel or several free carpels) or with the cenocarpous gynoecium (a compound pistil formed from two or more united carpels).

pistil

[′pist·əl]
(botany)
The ovule-bearing organ of angiosperms; consists of an ovary, a style, and a stigma.

pistil

the female reproductive part of a flower, consisting of one or more separate or fused carpels; gynoecium
References in periodicals archive ?
It was noted, in the EST analysis, that some genes were solely expressed in spikes at or before anthesis, some were solely in stamen or in pistil, apart from those expressed more abundantly in spikes than in other tissues.
As indicated in Table 5, first PC was loaded with two flower traits, corolla diameter, and petal length whereas the loading of the second and third PCs was contributed by pistil traits, namely, style length, style column length, and style arm length.
In addition to pistil growth, torsion of the stamens was observed, positioning the dehiscent side of the anthers toward the flower's exterior, as reported in other studies on rapeseed (Mussury and Fernandes, 2000; Rosa et al., 2010).
Because it was difficult to know the exact dates of anther dehiscence and pollen dispersal in the selfing experiment, it was very difficult to determine pollen-stigma interaction or pistil receptivity.
Take a flower and carefully remove all parts but the pistil. The pistil is composed of three parts, the stigma (which receives the pollen), the style (the neck below the stigma) and the carpel (or ovary).
Pollen grains, which contain the plants' male gametes (sperm cells), are carried from the male organ of the flower (the stamen) to the female organ (the pistil).
The structure of the book is analogous to that of a flower: if the stamens and pistils tell Mrs.
As soon as the door was opened, they immediately on pistil point put all the inmates in a locked room and started looting.
In addition, while irises have three stamens (male flower parts) and a pistil (female flower part), in orchids these parts are fused into a single structure called the column (see diagram on pg.
Both restaurants have a Michelin star and Darroze will no doubt be burning the midnight oil to win back the second star that was taken off her French outpost by Michelin earlier this year.) Tipping's main of halibut comes as a roasted steak on the bone with wild garlic, shellfish, baby spinach leaves and fondant potatoes, a bouillabaisse jus perfumed with saffron pistil. He says the dish has been done very well.