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Leaves, flowers, immature fruits and leafy flowered stems of Malva sylvestris: a comparative study of the nutraceutical potential and composition

Barros, Lillian; Carvalho, Ana Maria; Ferreira, Isabel C.F.R.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.62%
Malva sylvestris is widely used in Mediterranean and European traditional medicine and ethnoveterinary for the treatment of external and internal inflammation, as well as injuries. Moreover, its use is not only limited to therapeutic purposes; but also the species is locally regarded as a food wild herb. Considering that antioxidants and free radical scavengers can exert also an anti-inflammatory effect, the extracts of different parts of the medicinal/edible plant M. sylvestris (leaves, flowers, immature fruits and leafy flowered stems) were compared for their nutraceutical potential (antioxidant properties) and chemical composition. Particularly, mallow leaves revealed very strong antioxidant properties including radicalscavenging activity (EC50 = 0.43 mg/mL), reducing power (0.07 mg/mL) and lipid peroxidation inhibition in lipossomes (0.04 mg/mL) and brain cells homogenates (0.09 mg/mL). This part of the plant is also the richest in nutraceuticals such as powerful antioxidants (phenols, flavonoids, carotenoids, and tocopherols), unsaturated fatty acids (e.g. a-linolenic acid), and minerals measured in ash content

Comparing the composition and bioactivity of Crataegus monogyna flowers and fruits used in folk medicine.

Barros, Lillian; Carvalho, Ana Maria; Ferreira, Isabel C.F.R.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.75%
Introduction- Studying local plant foods is of particular interest as they often contain high amounts of bioactive compounds. Furthermore, their nutritional and medicinal impact must be documented and supported with scientific studies. Crataegus monogyna is an example of “functional food” traditionally used all over South European countries. Objective- A complete chemical and bioactive characterization of flower buds, flowers, unripe, ripened and over ripened fruits was performed. Methodology- Chemical characterization included determination of proteins, fats, ash, and carbohydrates, particularly sugars by HPLC-RI, fatty acids by GC-FID, tocopherols by HPLC-fluorescence, phenolics, flavonoids, β-carotene and ascorbic acid, by spectrophotometric techniques. Bioactivity was evaluated through screening of antioxidant properties: radical scavenging effects, reducing power, and inhibition of lipid peroxidation. Results- Flowers revealed the highest tocopherols and ascorbic acid contents, as also the best n-6/n-3 fatty acids ratio. Over ripened fruits showed the highest levels of carbohydrates, sugars and SFA. Unripe fruits presented the highest PUFA contents with the best PUFA/SFA ratio, as also the highest levels of phenolics and the most promising antioxidant properties (EC50 < 20.83 µg/ml; even better than trolox). Conclusion- This study shows the potential of different parts of Crataegus monogyna as sources of several compounds...

Characterization of phenolic compounds in flowers of wild medicinal plants from Northeastern Portugal.

Barros, Lillian; Dueñas, Montserrat; Carvalho, Ana Maria; Ferreira, Isabel C.F.R.; Santos-Buelga, Celestino
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.75%
Crataegus monogyna, Cytisus multiflorus, Malva sylvestris and Sambucus nigra have been used as important medicinal plants in the Iberian Peninsula since a long time ago, and are claimed to have various health benefits. This study aimed to determine the phenolic profile and composition of wild medicinal flowers of those species. The analysis was performed by HPLC-DAD-ESI/MS. Flavonoids, and particularly flavonols and flavones, were the main groups in almost all the studied samples. C. multiflorus sample gave the highest levels of total flavonoids (54.5 mg/g dw), being a chrysin derivative the most abundant flavone found (22.3 mg/g dw). C. monogyna revealed the highest concentration in phenolic acids (5.5 mg/g dw) that were not found in C. multiflorus sample; 5-O-caffeoylquinic acid was the most abundant phenolic acid found in the first species, being a procyanidin trimer also found (1.4 mg/g dw). Kaempferol-3-O-rutinoside (0.84 mg/g dw) and quercetin-3-O-rutinoside (14.9 mg/g dw) were the main flavonols present in M. sylvestris and S. nigra, respectively. Due to the well established antioxidant activity of phenolic compounds, the studied wild medicinal flowers could be selected for processing extracts with health-promoting properties or to be incorporate into functional beverages or products with bioactive properties related to oxidative stress.

Characterization of phenolic compounds in wild medicinal flowers from Portugal by HPLC-DAD-ESI/MS and evaluation of antifungal properties

Barros, Lillian; Alves, Carlos Tiago; Dueñas, Montserrat; Silva, Sónia; Oliveira, Rosário; Carvalho, Ana Maria; Henriques, Mariana; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.62%
In the present work, the phenolic compounds of Castanea sativa, Filipendula ulmaria and Rosa micrantha flowers from Northeastern Portugal were characterized by HPLC-DAD-ESI/MS. Furthermore, it was performed a screening of their antifungal potential against Candida species (C. albicans, C. glabrata, C. parapsilosis and C. tropicalis). C. sativa sample gave the highest amount of phenolic compounds (18973 ± 40 µg/g, fw) and hydrolysable tannins (14873 ± 110 µg/g). The highest amounts of phenolic acids (569 ± 20 µg/g) and flavonoids (6090 ± 253 µg/g) were obtained in F. ulmaria and R. micrantha samples, respectively. Hydrolysable tannins (e.g. tri and digalloyl HHDP glucose) were the main group of phenolic compounds in C. sativa and F. ulmaria samples, while flavonoids (e.g. (+)-catechin and procyanidin dimers and trimers) were the most abundant group in R. micrantha. Thus, the stronger effect showed by this latter against all the Candida species (MIC ≤ 0.155 mg/mL) and, particularly its fungicide effects in C. glabrata, might be related to the mentioned flavonoids that were inexistence in the other samples.

Evaluation of antioxidant activity of Tropaeolum majus L. flowers processed by ionizing radiation

Koike, Amanda; Pereira, Eliana; Antonio, Amilcar L.; Barreira, João C.M.; Villavicencio, Anna L.C.H.; Ferreira, Isabel C.F.R.
Fonte: IAEA - International Atomic Energy Agency Publicador: IAEA - International Atomic Energy Agency
Tipo: Conferência ou Objeto de Conferência
POR
Relevância na Pesquisa
37.03%
Edible flowers can be used to add flavor, taste, color and visual appeal to culinary preparations. Nasturium flowers (Tropaeolum majus L.) are used as an ingredient in culinary preparations namely, salads, crepes and pancakes[1]. Moreover, due to their antioxidant properties and bioactive components, edible flowers might be considered as healthy ingredients. Nevertheless, these flowers are highly perishable products and must be free from insect pests, which may represent a challenge since these species must grow without using any chemical pesticides [2]. Irradiation is a method that can be used for food disinfestation, in order to extend the shelf life of perishable products, improving their hygienic quality and food safety [3]. In fact, food irradiation has been pointed out as a good alternative to replace chemical fumigation of food matrices, including edible flowers [4]. The purpose of this study is to evaluate the antioxidant activity of T. majus flowers submitted to gamma and electron beam irradiation at 0, 0.5, 0.8 and 1.0 kGy. The antioxidant properties were evaluated through 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, reducing power and β-carotene bleaching inhibition assays. A statistical analysis using 2-way ANOVA (general linear model) showed that the flowers processed with gamma irradiation presented the highest reducing power (independently of the dose used). Furthermore...

Morfoanatomia da flor de cinco espécies de Galipea Aubl. e seu significado na evolução de flores tubulosas entre as Rutaceae neotropicais; Floral morphology and anatomy of five species of Galipea Aubl. and its bearing on the evolution of tubular flowers in Neotropical Rutaceae

PIRANI, José Rubens; EL OTTRA, Juliana Hanna Leite; MENEZES, Nanuza Luiza de
Fonte: Sociedade Botânica de São Paulo Publicador: Sociedade Botânica de São Paulo
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
36.75%
A maioria dos gêneros da subtribo neotropical Galipeinae (tribo Galipeeae, Rutoideae) tem flores tubulosas, com várias formas e graus de conação e adnação. Galipea e outros gêneros na subtribo apresentam apenas duas anteras férteis mais cinco ou mais estaminódios, o que é intrigante porque na tribo predominam flores pentâmeras isostêmones. Visando elucidar a condição anatômica dessas características e estabelecer estados acurados para caracteres em análises filogenéticas, um estudo morfoanatômico de flores de cinco espécies de Galipea foi realizado, buscando os padrões de vascularização, posição, e união dos segmentos da flor. Destacam-se os resultados: 1) um tubo floral genuíno se forma no terço basal da flor por conação dos filetes e adnação desse tubo estaminal às pétalas; 2) as pétalas são distalmente coerentes umas às outras e aderentes aos filetes por meio de entrelaçamento de tricomas densos - um caso de pseudossimpetalia; 3) dentre as cinco (às vezes seis) estruturas tratadas como estaminódios, apenas as três externas são de fato homólogas a estames esterilizados, as demais surgem como ramificações adaxiais das pétalas; 4) os carpelos são peltados, congenitalmente conatos axial e lateralmente da base do ovário até o nível das placentas...

Compostos bioativos em flores comestíveis processadas por radiação; Bioactive compounds in edible flowers processed by radiation"

Koike, Amanda Cristina Ramos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 29/05/2015 PT
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36.9%
Flores comestíveis são cada vez mais utilizadas nas preparações culinárias, sendo também reconhecidas por seus potenciais efeitos benéficos na saúde humana, o que exige novas abordagens para melhorar a sua conservação e segurança. Estes produtos altamente perecíveis devem ser cultivados sem o uso de agrotóxicos. Tratamento de irradiação pode ser a resposta a estes problemas, garantindo a qualidade dos alimentos, aumentando seu prazo de validade e desinfestação. Tropaeolum majus L. (capuchinha) e Viola tricolor L. (amorperfeito) são flores amplamente utilizadas nas preparações culinárias, sendo também reconhecidas por suas propriedades antioxidantes e alto teor de compostos fenólicos. O objetivo deste estudo foi avaliar os efeitos dose-resposta da irradiação por gama e feixe de elétron (doses de 0, 0,5, 0,8 e 1 kGy) sobre a atividade antioxidante, compostos fenólicos, aspectos físicos e potencial antiproliferativo das flores comestíveis. O flavonoide Kaempferol-O-hexosídeo-Ohexosídeo foi o composto mais abundante em todas as amostras de flores de Tropaeolum majus, enquanto Pelargonidina-3-O-soporosídeo foi a principal antocianina. Em geral, as amostras irradiadas demonstraram maior atividade antioxidante. Nas amostras da Viola tricolor...

Can the aqueous decoction of mango flowers be used as an antiulcer agent?

Lima, Z. P.; Severi, J. A.; Pellizzon, C. H.; Brito, ARMS; Solis, P. N.; Caceres, A.; Giron, L. M.; Vilegas, Wagner; Hiruma-Lima, C. A.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 29-37
ENG
Relevância na Pesquisa
36.75%
This study was designed to determine the effect of Mangifera indica flowers decoction, on the acute and subacute models of induced ulcer in mice and rats. A single oral administration of the aqueous decoction (AD) from M. indica up to a dose of 5 g/kg, p.o. did not produce any signs or symptom of toxicity in the treated animals. The oral pre-treatment with AD (250, 500 and 1000 mg/kg) in rats with gastric lesions induced by ethanol, decreased the gastric lesions from 89.0 +/- 6.71 (control group) to 9.25 +/- 2.75, 4.50 +/- 3.30 and 0, respectively. Pretreatment with AD (250, 500 and 1000 mg/kg) to mice with HCl/ethanol- or stress-induced gastric lesions resulted in a dose-dependent significant decrease of lesion index. In the piroxicam-induced gastric lesions, the gastroprotective effect of AD was reducing with the increase of the AD dose. In the pylorus-ligature, AD (p.o.) significantly decreased the acid output indicating the antisecretory property involved in the gastroprotective effect of M. indica. Treatment with AD during 14 consecutive days significantly accelerated the healing process in subacute gastric ulcer induced by acetic acid in rats. Pretreatment with N-nitro-L-arginine methyl ester (L-NAME), an inhibitor of NO-synthase...

Birds at Eucalyptus and other flowers in Southern Brazil: A review

Willis, Edwin O.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 43-66
ENG
Relevância na Pesquisa
37.07%
In southern Brazil, I recorded 14 species of hummingbirds, one woodpecker, three Psittacidae, four Tyrannidae, one mockingbird, and 31 tanagers and relatives at eucalyptus flowers. Others have registered 3 different hummingbirds, another parrotlet, four more tyrannids, a peppershrike, a thrush, and 5 tanagers and related birds, for a total of 69 species. However, commercial plantations rarely flower, so use is local or undependable. Understory Phaethorninae are not recorded at eucalyptus, rarely at other tall and hence multiflowered trees. Bromelias and other flowers are noted in various studies, which add 89 species of flower feeders, including 14 Psittacidae, 17 Trochilidae, and 37 tanagers and relatives. Isolated low flowers and epiphytes are mostly visited by hummingbirds (some by Coereba), but some tall trees (Chorisia) also. As two times as many tanager species visit flowers as hummingbirds, researchers will have to get up early and patiently study treetop and nonpatchy habitats. However, tree plantations can attract artificially, like feeders. Bunch-flowering extrafloral nectar (Mabea, Combretum) is preferred by wandering mixed-flock treetop or edge tanagers and relatives, which often crawl over bunched flowers like parrots or woodpeckers (or marsupials and other mammals) rather than hover at separate flowers like nonflocking Trochilidae or peck from nearby like Nectariniidae and Coereba. Clamberers and petal-pullers...

Characterization of phenolic compounds in wild medicinal flowers from Portugal by HPLC–DAD–ESI/MS and evaluation of antifungal properties

Barros, Lillian; Alves, Carlos; Dueñas, M.; Silva, Sónia Carina; Oliveira, Rosário; Carvalho, Ana Maria; Henriques, Mariana; Santos-Buelga, Celestino; Ferreira, Isabel C. F. R.
Fonte: Elsevier; Elsevier BV Publicador: Elsevier; Elsevier BV
Tipo: Artigo de Revista Científica
Publicado em //2013 ENG
Relevância na Pesquisa
36.62%
In the present work, the phenolic compounds of Castanea sativa, Filipendula ulmaria and Rosa micrantha flowers from Northeastern Portugal were characterized by HPLC–DAD–ESI/MS. Furthermore, it was performed a screening of their antifungal potential against Candida species (Candida albicans, Candida glabrata, Candida parapsilosis and Candida tropicalis). C. sativa sample gave the highest amount of phenolic compounds (18973 ± 40 μg/g, fw) and hydrolysable tannins (14873 ± 110 μg/g). The highest amounts of phenolic acids (569 ± 20 μg/g) and flavonoids (6090 ± 253 μg/g) were obtained in F. ulmaria and R. micrantha samples, respectively. Hydrolysable tannins (e.g. tri and digalloyl HHDP glucose) were the main group of phenolic compounds in C. sativa and F. ulmaria samples, while flavonoids (e.g. (+)-catechin and procyanidin dimers and trimers) were the most abundant group in R. micrantha. Thus, the stronger effect showed by this latter against all the Candida species (MIC ≤ 0.155 mg/mL) and, particularly its fungicide effects in C. glabrata, might be related to the mentioned flavonoids that were inexistence in the other samples.

Essential oils of flowers of Citrus sinensis and Citrus clementina cultivated in Algarve, Portugal

Miguel, Maria Graça; Dandlen, S.; Figueiredo, A. C.; Barroso, J. G.; Pedro, L. G.; Duarte, Amílcar; Faísca, J.
Fonte: International Society for Horticultural Science Publicador: International Society for Horticultural Science
Tipo: Artigo de Revista Científica
Publicado em /01/2008 ENG
Relevância na Pesquisa
36.75%
The essential oils, isolated by hydrodistillation, from the flowers of different cultivars of Citrus sinensis (L.) Osbeck (Cs) and Citrus clementina Hort. Ex Tan. (Cc) collected at different harvesting times, were analyzed by GC and GC-MS. All the samples studied afforded yellowish oil which yields ranged from 0.05 to 0.08 % (v/w). The monoterpene fraction dominated both oils (66-91%), being the monoterpene hydrocarbons the main components of this fraction (45-69%). Sabinene (31-48%), linalool (15-32%) and limonene (4-10%) dominated both Cs and Cc oils. trans-Nerolidol was the major sesquiterpene component, attaining 3-10%. Cluster analysis of the essential oil composition from the twelve samples studied, confirmed a major chemical homogeneity (Scorr>0.95) despite the fact of having used different periods of hydrodistillation, different harvesting times and being flowers of two different Citrus species.

Bees visitors of three species of Clusia (Clusiaceae) flowers in Central Amazonia

Kaminski,Ana Claudia; Absy,Maria Lúcia
Fonte: Instituto Nacional de Pesquisas da Amazônia Publicador: Instituto Nacional de Pesquisas da Amazônia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2006 EN
Relevância na Pesquisa
36.75%
Observations on bees visitors to three species of Clusia (Clusiaceae) flowers in the Reserva Adolpho Ducke, Manaus, Amazonas, Brazil were made during three two-week periods. The three species of Clusia, namely C. grandiflora, C. panapanari and C. insignis, presented variations regarding the species of bee visitors. A total of 23 bee species visited the three species of Clusia. The Euglossini and Meliponinae bees were the most frequent visitors of the Clusia flowers. Bee collecting behavior of floral resources is described.

Impact of Forpus xanthopterygius (Spix, 1824) (Aves, Psittacidae) on flowers of Handroanthus serratifolius (Vahl.) S. O. Grose (Bignoniaceae)

Melo,C.; Oliveira,AD.; Borges,CA.; Ribeiro,G.; Tavares,J.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/11/2009 EN
Relevância na Pesquisa
36.98%
Handroanthus serratifolius produces flowers during the dry season in the Cerrado biome, and it may be an important food source to some bird species. For Psittacidae species, like Forpus xanthopterygius, flowers are important in their diet. This study intended to characterize the behavior of F.xanthopterygius and evaluate the damage to the flowering and in the reproduction of H. serratifolius. Four individuals of H. serratifolius were observed for 60 hours to register size of groups, the time and duration of visit, and the number of flowers predated by F.xanthopterygius. The groups that visited the plants had between 2 and 12 individuals. The mean time of visits was 60.31 minutes (±22.29). The size of groups was correlated to number of flowers predated and was influenced by number of flowers offered. During the flowering, each H. serratifolius individual loses approximately 1,052 flowers per week.

Interaction between Bees and the Tristylous Flowers of Oxalis cytisoides Mart. & Zucc. (Oxalidaceae).

KRUG, C.; SILVA, C. I.; ALVES-DOS-SANTOS, I.
Fonte: Psyche: A Journal of Entomology, Cambridge, v. 2012, p. 1-8, 2012. Publicador: Psyche: A Journal of Entomology, Cambridge, v. 2012, p. 1-8, 2012.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
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The interaction of bees with the tristylous flowers of Oxalis cytisoides Mart. & Zucc. (Oxalidaceae) was evaluated. The study was conducted in a semideciduous forest at the Fritz Plaumann State Park in Conc ´ ordia, Santa Catarina state. Two Oxalis cytisoides aggregations were found and the flower visiting bees were observed. The 3 floral morphs were found at the following proportions: 16 long-, 37 mid-, and 34 shortstyled individuals (n = 87). Anthesis lasted one day (6:30 AM to 3 PM). No fruit was formed in the autogamy test; thus, pollination was dependent on the visitors. The pollen grain size varied between the stamens and morphs and formed subsets in accordance with the stigma height (long/mid/short).We collected 165 bees from 30 species visiting the flowers. Hypanthium divaricatum was the most abundant bee species (34%) and the males were often observed patrolling the flowers in search of females for mating. Analysis of the pollen loads from 34 females showed that 27 carried O. cytisoides pollen. The most frequent bees that carried O. cytisoides pollen grains on their bodies were considered pollinator agents, responsible for transferring pollen grains among the floral morphs.; 2012

Biophysics and physiology of temperature regulation in thermogenic flowers

Seymour, R.
Fonte: Kluwer Academic/Plenum Publ Publicador: Kluwer Academic/Plenum Publ
Tipo: Artigo de Revista Científica
Publicado em //2001 EN
Relevância na Pesquisa
36.75%
The flowers or inflorescences of certain primitive seed plants are able to regulate their temperature during blooming by modulating the rate of heat production to remain much warmer than the surroundings. A large drop in ambient temperature causes a smaller drop in flower temperature which causes an increase in the rate of heat production by futile involvement of the cytochrome and alternative oxidase respiratory pathways. The result is that the rate of heat production is inversely related to ambient temperature and flower temperature remains high and relatively independent of ambient temperature. While the biophysics of thermal balance in the whole flowers is better understood, the regulation of the biochemical heat-generating pathways is not known.; © 2001 Plenum Publishing Corporation

HPLC-DAD-MS/MS profiling of phenolics from Securigera securidaca flowers and its anti-hyperglycemic and anti-hyperlipidemic activities

Ibrahim,Rana M.; El-Halawany,Ali M.; Saleh,Dalia O.; El Naggar,El Moataz Bellah; El-Shabrawy,Abd El-Rahman O.; El-Hawary,Seham S.
Fonte: Sociedade Brasileira de Farmacognosia Publicador: Sociedade Brasileira de Farmacognosia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2015 EN
Relevância na Pesquisa
36.94%
Abstract Securigera securidaca (L.) Degen & Döefl., Fabaceae, has been widely used in the Iranian, Indian and Egyptian folk medicine as antidiabetic and anti-hyperlipidemic remedy. Phenolic profiling of the ethanolic extract (90%) of the flowers of S. securidaca was performed via HPLC-DAD-MS/MS analysis in the positive and negative ion modes. The total polyphenols and flavonoids in the flowers were determined colorimetrically, and the quantification of their components was carried out using HPLC-UV. Total phenolics and flavonoids estimated as gallic acid and rutin equivalents were 82.39 ± 2.79 mg/g and 48.82 ± 1.95 mg/g of the dried powdered flowers, respectively. HPLC-DAD-MS/MS analysis of the extract allowed the identification of 39 flavonoids and eight phenolic acids. Quantitative analysis of some flavonoids and phenolics (mg/100 g powdered flowers) revealed the presence of isoquercetrin (3340 ± 2.1), hesperidin (32.09 ± 2.28), naringin (197.3 ± 30.16), luteolin (10.247 ± 0.594), chlorogenic acid (84.22 ± 2.08), catechin (3.94 ± 0.57) and protocatechuic acid (34.4 ± 0.15), in the extract. Moreover, the acute toxicity, hypoglycemic and hypolipidemic effects of the extract were investigated using alloxan induced diabetes in rats in a dose of 100...

A research note on the occurrence of 'star' flowers in grapevines: Observations during the 2003-2004 growing season

Longbottom, M.; Dry, P.; Sedgley, M.
Fonte: Australian Society of Viticulture and Oenology Publicador: Australian Society of Viticulture and Oenology
Tipo: Artigo de Revista Científica
Publicado em //2004 EN
Relevância na Pesquisa
37.07%
In 2003 star flowers were observed on three different grape varieties in the Coombe Vineyard at the University of Adelaide's Waite Campus. The earliest star flowers on Canada Muscat, and those on Gamay (which were also associated with stunted shoots), most closely resembled the structure of star flowers as described by previous authors. Later in the season, despite opening in star formation, the organs of the star flowers were normal. Star flowers may take different forms, which in turn hold implications for their comparative ability to set fruit. In contrast to previously published reports, the subsequent occurrence of normal flowers on a double-pruned Canada Muscat vine demonstrated that star flowers are not necessarily expressed during each and every generation of flowers. Occurrence of star flowers probably results from a genotype X environment X time interaction rather than a developmental aberration that is expressed during each and every generation of flowers.; Mardi L. Longbottom, Peter R. Dry And Margaret Sedgley

Avaliação da sazonalidade do mercado de flores e plantas ornamentais no estado de São Paulo.; Seasonality's evaluation of flowers and ornamental plants market in the state of São Paulo.

Marques, Roberta Wanderley da Costa
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 22/04/2002 PT
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O presente trabalho teve como objetivo principal a avaliação do eventual comportamento sazonal dos volumes e preços praticados na floricultura paulista. Para tal, houve a necessidade de seleção dos produtos e entrepostos a serem trabalhados. Os produtos escolhidos foram: rosa, crisântemo e violeta. Dados referentes à década de 90 foram levantados em entrepostos de comercialização selecionados no Estado de São Paulo: CEAGESP-SP (Companhia de Entrepostos e Armazéns Gerais de São Paulo), Veiling Holambra (cooperativa que comercializa produto de produtores via leilão eletrônico) e a CEASA-Campinas (Central de Abastecimento S.A de Campinas). Além desse objetivo principal, realizou-se a identificação dos períodos sazonais existentes, a identificação das características do comportamento sazonal de volumes e preços e a comparação das características de mercado das principais flores e plantas ornamentais comercializadas nos entrepostos selecionados no Estado de São Paulo. Os resultados do trabalho apontaram períodos diferentes para o volume de rosa, crisântemos e violetas. Por outro lado, para cada tipo de flor, observou-se maiores semelhanças para o período de preços praticados nestes entrepostos. Por exemplo...

Adaptation of anthurium cultivars as cut flowers in a subtropical area

Assis,Adriane Marinho de; Unemoto,Lilian Keiko; Faria,Ricardo Tadeu de; Destro,Deonísio; Takahashi,Lúcia Sadayo Assari; Roberto,Sérgio Ruffo; Prudêncio,Sandra Helena; Tombolato,Antonio Fernando Caetano
Fonte: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira Publicador: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2011 EN
Relevância na Pesquisa
36.75%
The objective of this work was to evaluate the adaptation of anthurium (Anthurium andraeanum) cultivars as cut flowers in a subtropical area, located in north of Paraná State, Brazil. The Apalai, Ianomami, Kinã, nK 102, Parakanã, Rubi, and Terena cultivars were cultivated in a nursery under 80% shade. The number of leaves and inflorescences, floral stem length, length and width of inflorescences, and spadix length were evaluated. The experimental design was in completely randomized blocks, with six replicates and five plants per plot. During the 18 months evaluated, 'Parakanã' produced 11 inflorescences per plant, whereas the other cultivars produced seven to nine inflorescences per plant. The number of leaves produced per plant was: 'Ianomami', 25; 'Parakanã', 20; 'Apalai' and 'Terena', 15; 'Kinã' and 'Rubi', 11; and 'nK 102', 9. The Apalai, nK 102, Parakanã, and Rubi cultivars are the most recommended as cut flowers; the Ianomami cultivar is not recommended as a cut flower in this region.

Why are so many bird flowers red?

Rodríguez-Gironés, Miguel Ángel; Santamaría, Luis
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artículo Formato: 2126854 bytes; application/pdf
ENG
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5 pages, 3 figures.-- PMID: 15486585 [PubMed].-- PMCID: PMC521733.; Most bird-pollinated flowers are both red and rich in nectar. The traditional explanation for this association is that, since red is inconspicuous to bees, it evolved to prevent bees from depleting the nectar of bird-pollinated flowers without effecting pollination. But bees can see, and they actually visit red flowers. So why are most bird-pollinated flowers red? To help answer this question, we need to consider how the outcomes of foraging decisions are affected by the community in which individuals live, and by the foraging options of other individuals.; Part of this work was conducted during MARG's fellowship at the Institute for Advanced Study of Berlin. The work was supported by funding from the Spanish Ministry of Science and Technology (INVASRED project, Ref. REN2003-06962/GLO).; Peer reviewed