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To which genus does the enigmatic Peninsular Malaysian Chirita elata (Gesneriaceae) belong? Naturalis
Rafidah, A.R.; Kiew, R.; Haron, N.W..
The anomalous Chirita elata proves to belong to Codonoboea (Gesneriaceae), necessitating the new combination Codonoboea elata.
Tipo: Article / Letter to the editor Palavras-chave: Chirita; Codonoboea; Didissandra; Peninsular Malaysia; Stamens; Stigma.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/525191
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The Complex Interaction of Markets For Endangered Species Products AgEcon
Fischer, Carolyn.
Economic models of trade in endangered species products often do not incorporate four focal arguments in the policy debate over trade bans: 1) law-abiding consumers may operate in another market, separate from illegal consumers, that trade would bring online; 2) legal trade reduces stigma, which affects demand of law-abiding consumers; 3) laundering may bring illegal goods to legal markets when trade is allowed; 4) legal sales may affect illegal supply costs. This paper analyzes systematically which aspects of these complicated markets, separately or in combination, are important for determining whether limited legalized trade in otherwise illegal goods can be helpful for achieving policy goals like reducing poaching.
Tipo: Working or Discussion Paper Palavras-chave: Endangered species; Black markets; CITES; Poaching; Stigma; Environmental Economics and Policy; K42; Q21; D11.
Ano: 2002 URL: http://purl.umn.edu/10525
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Which Consumers Are Most Responsive to Media-Induced Food Scares? AgEcon
Payne, Collin R.; Messer, Kent D.; Kaiser, Harry M..
In understanding decreases in demand after exposure to media-induced food scares, aggregate data are almost exclusively presented without taking into consideration potential confounding variables. However, a better approach may be to use an experimental design coupled with targeting homogeneous willingness-to-pay (WTP) subgroups based on similarities in behavioral, psychological, and demographic characteristics of those who are most vulnerable to food scare information. This is accomplished through experimental economics and an analysis strategy called a classification and regression tree (CART). A stigma framework—which guides conceptual understanding of effects of media-induced food scares—suggests controlling contextual variables to better approximate...
Tipo: Journal Article Palavras-chave: Food scare; Media; Classification and regression tree; Mad cow disease; Stigma; Marketing.
Ano: 2009 URL: http://purl.umn.edu/59231
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Pollen morphology and availability of pollen and stigma in Syzygium (Myrtaceae) Rev. Bras. Frutic.
Nacata,Guilherme; Belonsi,Talita Kely; Gasparino,Eduardo Custódio; Andrade,Renata Aparecida de.
Abstract The present study aimed to describe the pollen morphology in three species of Syzygium, to test pollen availability and stigma receptivity. The pollen was analyzed by light and scanning microscopy to show the detailed ornamentation of the pollen grains. Pollen availability was measured according to two protocols. Stigmatic receptivity was tested at different stages of flower development. There are differences among the pollen morphology for the species studied; when the polar and equatorial diameters are measured in the equatorial view of the pollen grains, it is observed that S. jambos is the largest species concerning the two values of the diameters, S. malaccense is the smallest species and S. aqueum, the largest species in relation to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exotic fruit tree; Palynology; Pollen grains; Stigma; Syzygium.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000600202
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Histological analysis of pollen-pistil interactions in sour passion fruit plants (Passiflora edulis Sims) Biocell
Madureira,Hérika Chagas; Pereira,Telma Nair Santana; Cunha,Maura Da; Klein,Denise Espellet.
The success of sexual plant reproduction is directly influenced by specific interactions between the pollen and pistil. Light, fluorescence and scanning electron microscopy techniques were used to evaluate the steps of pollination in sour passion fruit plants (Passiflora edulis Sims). In the compatible interaction, pollen tubes grow through stigma projections towards the ovary. The pollen grain surface was found to be spheroidal and to consist of heteroreticulate exine with six colpi. Furthermore, analysis in vivo of pollen-pistil interactions indicated that stigmas of flowers 24 hours before anthesis are unable to discriminate compatible (genetically unrelated) and incompatible (genetically related) pollen grains. Taken together, these results provide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flower; Pollen tube; Pollination; Stigma.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452012000200005
Registros recuperados: 5
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