(n.) The seed-bearing organ of a flower. It consists of an ovary, containing the ovules or rudimentary seeds, and a stigma, which is commonly raised on an elongated portion called a style. When composed of one carpel a pistil is simple; when composed of several, it is compound. See Illust. of Flower, and Ovary.
Example Sentences:
(1) Raised levels of atmospheric water cause a variety of responses in self-pollen, ranging from tube growth through the pistil to the ovary, to tubes inhibited at the stigmatic surface, accompanied by the formation of callose.
(2) When applied to sections of the pistil, these antibodies label the intercellular matrix in the stigma and transmitting tissue of the style and the cell walls in the epidermis of the placenta.
(3) We describe in this report the allelic diversity and gene structure of the S locus in Solanum tuberosum revealed by the isolation and characterization of genomic and cDNA clones encoding S-associated major pistil proteins from three alleles (S1, Sr1, S2).
(4) The label is transferred from pistil to pollen tubes apparently via the secretion products (exudate) of the pistil.
(5) The female S-locus gene products for two families showing different types of SI have been putatively identified as major pistil glycoproteins (the S-locus-specific glycoproteins of the Brassicaceae and the S-RNases of the Solanaceae).
(6) LAT52 mRNA is not detectable in pistils, sepals or non-reproductive tissues.
(7) The S-glycoproteins were expressed mainly in the upper part of the pistil and showed an increasing concentration during flower development.
(8) In situ hybridization experiments showed that at least one of these pistil-specific genes is specifically expressed in cells of the transmitting tissue.
(9) The structural events in the stigma and transmitting tissue of Petunia hybrida pistils that accompany compatible and incompatible intraspecific pollinations have been investigated in detail, together with the changes in reserve levels that also take place at this time.
(10) After pollination, the transcript levels of the pistil-specific extensin-like genes change relative to levels in unpollinated pistils.
(11) Compatible and incompatible pollen tubes growing on detached Lilium longiflorum pistils which had been prelabeled with myoinositol-U-(14)C take up a portion of the label and utilize it for biosynthesis of tube wall substance.
(12) The S2- and S3-alleles encode pistil-specific proteins of 30 kDa and 31 kDa, respectively, which were previously identified based on cosegregation with their respective alleles in genetic crosses.
(13) The maximal levels of 9612 RNA detected in anthers and vegetative organs were more than 50-fold and 250-fold lower than the level in pistils, respectively.
(14) The possible roles of the extensin-like proteins in pistils are discussed.
(15) A glycoprotein serologically related to the PR-2,N,O class is a (1,3)-beta-glucanase and is present in pistils.
(16) Here we report the characterization of a gene encoding another pistil ribonuclease of P. inflata, RNase X2.
(17) Double staining with sirofluor allows location of nuclei within pollen tubes grown in vitro, and when used after pollination enables the viewer to discriminate between nuclei within the pollen tube vs. nuclei of the pistil tissue.
(18) In the case of pistils, a pattern of labeling in ovary, style, and stigma is obtained which indicates that products of myoinositol metabolism are utilized in the biosynthesis of exudate (secretion product) of the stigma and style as well as for components of pistil cell walls.
(19) RNA gel blot hybridizations demonstrated the organ-specific expression of the extensin-like genes and their temporal regulation during pistil development.
(20) We have sought to identify pistil-specific genes that can be used as molecular markers to study pistil development.
Stigma
Definition:
(v. t.) A mark made with a burning iron; a brand.
(v. t.) Any mark of infamy or disgrace; sign of moral blemish; stain or reproach caused by dishonorable conduct; reproachful characterization.
(v. t.) That part of a pistil which has no epidermis, and is fitted to receive the pollen. It is usually the terminal portion, and is commonly somewhat glutinous or viscid. See Illust. of Stamen and of Flower.
(v. t.) A small spot, mark, scar, or a minute hole; -- applied especially to a spot on the outer surface of a Graafian follicle, and to spots of intercellular substance in scaly epithelium, or to minute holes in such spots.
(v. t.) A red speck upon the skin, produced either by the extravasation of blood, as in the bloody sweat characteristic of certain varieties of religious ecstasy, or by capillary congestion, as in the case of drunkards.
(v. t.) One of the external openings of the tracheae of insects, myriapods, and other arthropods; a spiracle.
(v. t.) One of the apertures of the pulmonary sacs of arachnids. See Illust. of Scorpion.
(v. t.) One of the apertures of the gill of an ascidian, and of Amphioxus.
(v. t.) A point so connected by any law whatever with another point, called an index, that as the index moves in any manner in a plane the first point or stigma moves in a determinate way in the same plane.
(v. t.) Marks believed to have been supernaturally impressed upon the bodies of certain persons in imitation of the wounds on the crucified body of Christ. See def. 5, above.
Example Sentences:
(1) Health information dissemination is severely complicated by the widespread stigma associated with digestive topics, manifested in the American public's general discomfort in communicating with others about digestive health.
(2) It is likely that many of the girls end up working in brothels, but due to the stigma of being a sex worker they will usually report they were forced into marriage.
(3) To feel like a useful human being without any stigma attached, without undue fears and pressures but with a sense of being needed and wanted, that is what life is all about.
(4) Prince Harry and the Duke and Duchess of Cambridge have enlisted a rapper, a Royal Marine and a Labour spin doctor to try to push stigma about discussing mental health beyond what they believe is a “tipping point” and into public acceptability.
(5) This stigma remains to the present and was observed to exist even among service providers: Low knowledge levels of patients on the causes of the disease on the one hand, and service providers on the cure, particularly on the use of Multiple Drug Therapy.
(6) The failure of this effort, along with the stigma against psychiatry has led to poor treatment of disturbed patients by primary care physicians.
(7) The stigma of having no brothers or sisters meant that any acting up was immediately dismissed with a caustic, “Well, he is an only child.” The subtext was that my parents had doted on me excessively, inflating my sense of importance.
(8) Patients react to the physical realities of the disease while experiencing the stigma and fear which society imposes on AIDS.
(9) She also warned over increasing stigma being shown toward Gypsies, Travellers and Roma struggling to find accommodation.
(10) Commonly there is a desire by girl learners to continue their education , especially their formal education, despite their pregnancy even when the barriers to returning to school imposed by their families or schools and social stigmas may not easily permit it.
(11) This article focuses on the management of stigma by methadone maintenance patients.
(12) The patients may find that a psychiatric diagnostic label is a stigma and has bad consequences.
(13) You take one aspect of someone or some group's behaviour and jump to far-reaching conclusions as to their mental state and inflict an unwarranted stigma upon them.
(14) Factor analysis yielded four indices: a) impact of disease (e.g., being a burden, loss of energy, loss of bowel control); b) sexual intimacy; c) complications of disease (e.g., developing cancer, having surgery, dying early); and d) body stigma (e.g., feeling dirty or smelly).
(15) The UCI should also pay more attention to medical issues in cycling and when Therapeutic Use Exemptions should be granted Words of warning Sanctioned riders should be used ‘as an educational tool’ to inform their peers about the dangers of doping through interviews, appearances, lectures and recorded messages pointing out the impact of doping on their lives, ‘the social stigma, financial impact, health effects and self-esteem issues’ Voice of the union The UCI should ‘facilitate the creation of a strong riders’ union … to give riders a collective voice particularly on issues of ownership, revenue sharing, the racing calendar and anti-doping.
(16) In essence, criminalisation leads to stigma, and stigma leads to harassment."
(17) The sequence is reported of a cDNA molecule homologous to an mRNA from stigma tissue of Brassica oleracea plants homozygous for the S5 self-incompatibility allele.
(18) It was really only when William Styron published Darkness Visible in 1990 that depression entered mainstream social discourse and began to lose its stigma (even growing into a badge of honour for a while).
(19) As part of UNAids’ Protect the Goal campaign to raise awareness of HIV and Aids during the World Cup in Rio, we explored whether tweets could be used to measure HIV-related stigma.
(20) Encopresis afflicts one in 100 children causing considerable stigma and parental concern.