Academic literature on the topic 'Polygonaceae A'
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Journal articles on the topic "Polygonaceae A"
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Van Leeuwen, P., W. Punt, and P. P. Hoen. "Polygonaceae." Review of Palaeobotany and Palynology 57, no. 1-2 (October 1988): 81–151. http://dx.doi.org/10.1016/0034-6667(88)90048-6.
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Germishuizen, G. "POLYGONACEAE." Bothalia 17, no. 1 (October 23, 1987): 40–41. http://dx.doi.org/10.4102/abc.v17i1.1012.
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Germishuizen, G. "POLYGONACEAE." Bothalia 17, no. 2 (October 23, 1987): 185–87. http://dx.doi.org/10.4102/abc.v17i2.1032.
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Germishuizen, G. "POLYGONACEAE." Bothalia 18, no. 2 (October 23, 1988): 187–88. http://dx.doi.org/10.4102/abc.v18i2.1046.
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Ferrer-Gallego, P. Pablo. "Polygonum orientale L. (Polygonaceae) nueva especie para la provincia de Valencia. Polygonum orientale L. (Polygonaceae) new species for the Valencian province." Acta Botanica Malacitana 35 (December 1, 2010): 143–45. http://dx.doi.org/10.24310/abm.v35i0.2869.
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Polygonum orientale L. (Polygonaceae) new species for the Valencian province. Palabras clave. Polygonum orientale, Polygonaceae, corología, Valencia. Key words. Polygonum orientale, Polygonaceae, chorology, Valencian province.
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Marques, Isabel, Cristina Tauleigne-Gomes, and David Draper. "Rumex palustris Sm. (Polygonaceae), nueva especie para la flora de Portugal. Rumex palustris Sm. (Polygonaceae), a new species for the Portuguese flora." Acta Botanica Malacitana 35 (December 1, 2010): 150–52. http://dx.doi.org/10.24310/abm.v35i0.2876.
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Rumex palustris Sm. (Polygonaceae), a new species for the Portuguese flora. Palabras clave. Rumex palustris,Polygonaceae, corología, embalse del Alqueva, Portugal. Key words. Rumex palustris,Polygonaceae, chorology, Alqueva dam, Portugal.
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Boufford, David E., and Hang Sun. "New Combination inAconogonon(Polygonaceae)." Harvard Papers in Botany 14, no. 2 (December 2009): 197. http://dx.doi.org/10.3100/025.014.0213.
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Pendry, Colin A. "Monograph of Ruprechtia (Polygonaceae)." Systematic Botany Monographs 67 (2004): 1. http://dx.doi.org/10.2307/25027911.
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Brandbyge, John. "The genus Leptogonum (Polygonaceae)." Nordic Journal of Botany 10, no. 5 (December 1990): 487–92. http://dx.doi.org/10.1111/j.1756-1051.1990.tb02092.x.
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de Lange, P. J., and F. D. H. Pitt. "Typification ofMuehlenbeckia astoniiPetrie (Polygonaceae)." New Zealand Journal of Botany 36, no. 2 (June 1998): 305–6. http://dx.doi.org/10.1080/0028825x.1998.9512569.
Full textDissertations / Theses on the topic "Polygonaceae A"
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Lewis, Paul Ollin. "Allozyme variation and evolution in Polygonella (Polygonaceae)." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1239622655.
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Silva, Celice Alexandre. "Coccoloba cereifera Schwacke (Polygonaceae): aspectos ecofisiológicos e reprodutivos." Universidade Federal de Viçosa, 2003. http://www.locus.ufv.br/handle/123456789/8816.
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O presente estudo teve como objetivos avaliar algumas estratégias ecofisiológicas e reprodutivas de Coccoloba cereifera para sua manutenção e desenvolvimento em condições déficit hídrico. As avaliações ecofisiológicas em campo consistiram no monitoramento do potencial hídrico foliar nas estações seca e chuvosa e no acompanhamento da fenologia vegetativa e reprodutiva da espécie durante um ano. O potencial hídrico foliar na estação seca apresentou pouca variação em relação à estação chuvosa. As avaliações fenológicas foram realizadas em trinta indivíduos, onde foram contados o número de folhas novas, a presença flores abertas e frutos. Constatou-se que C. cereifera investe na produção de biomassa verde durante todo o ano e a floração e frutificação geralmente correspondem ao início do período chuvoso. Em casa de vegetação foi analisado o efeito do estresse hídrico sobre as trocas gasosas de C. cereifera em três tratamentos: capacidade de campo (CC), estresse hídrico moderado (EM) e estresse hídrico severo (ES), os seguintes parâmetros foram avaliados: transpiração (E), condutância estomática (g s ), taxa fotossintética líquida (A), relação Ci/Ca, eficiência do uso da água (EUA) e fotoquímica (Fv/Fm). Foram cinco semanas de avaliações, no final da quarta semana foi realizada rega nos tratamentos (EM) e (ES). O (EM) não provocou variação significativa para os parâmetros avaliados. No (ES) observou-se reduções acentuadas desses parâmetros com recuperação após a re-irrigação. Os estudos da biologia reprodutiva tiveram como objetivos verificar a fenologia reprodutiva, analisar a morfologia e biologia floral, o sistema reprodutivo e identificar os visitantes florais de C. cereifera. Na fenologia reprodutiva verificou-se maior investimento na reprodução no período chuvoso. A morfologia floral constituiu de análises de campo e laboratório. A espécie apresentou quatro tipos florais, caracterizando-a como polígamo-dióica. Para o estudo da biologia floral foram registrados o horário de antese, a longevidade floral, a presença de néctar e a receptividade do estigma. Constatou-se que as flores atingem máximo de abertura floral às doze horas e sua longevidade é de vinte e quatro horas. O néctar estava presente em todos os tipos florais, a viabilidade do pólen e a receptividade do estigma variaram entre eles. No sistema reprodutivo foram realizados três tratamentos, autopolinização espontânea, polinização aberta e polinização cruzada; verificou-se também o crescimento do tubo polínico. A autopolinização espontânea registrou apomixia e menor produção de frutos para a polinizações aberta e cruzada. O crescimento do tubo polínico foi observado em quase todos os tipos florais. No estudo da germinação de sementes foram aplicados quatro tratamentos: sementes com perigônio seco, sementes com perigônio seco removido, sementes com perigônio carnoso e sementes com perigônio carnoso removido. As maiores porcentagens de germinação ocorreram quando se removeu o perigônio. Os visitantes florais capturados consistiam em pequenos insetos que podem atuar como importantes polinizadores.
The aim of this work was to evaluated some of the reproductive and ecophysiology aspects of Coccoloba cereifera, which would allow its survival and developmental under water stress situation. Under field conditions the leaf water potential was monitored during the dry and the raining season. Phenological and reproductive studies were also carried out. The changes on the leaf water potential were recorded at every hour, during 12 hours, using a pressure bomb. The data obtained were used to generated a daily curve for both seasons. The water potential of leaves during the dry season showed no significant difference from those of the raining season. In the phenology assessment, thirty individuals were screened for their number of young leaves, mature flowers, and fruits. C. cereifera invested on leaf production year around , although the flower and fruit production occurred early in the raining season. The effects of water stress on C. cereifera gas exchange treads were analyzed on plants under a glasshouse setting through three treatments: field capacity (CC), moderated water stress (EM), and severe water stress (ES). The parameters, transpiration (E), stomatal conductance (g s ), net photosynthesis (A), Ci/Ca ratio, and water use efficiency (EUA) were measured with a infra red analyzer (IRGA) while the photochemical efficiency, was evaluated based on the values of Fv/Fm, by a fluorescence analyzer (PEA). The treatments were applied during five weeks, and the evaluations carried out weekly. By the end of the fourth week, the plants under water restriction treatment (EM and ES) were reirrigated to field capacity. Plants exposed to the ES treatment showed the largest decline in all parameters. However, when reirrigation took place the values returned to standard levels. The C. cereifera reproductive biology study focused on the reproductive phenology, floral biology and morphology and identified the floral visitors. The large investment on the reproductive process occurred during the raining season. The floral analyses revealed that this specie is poligamo-dioica, presenting four different flower types. The flowers had maximum aperture around noon and a period of 24 hours longevity. Nectar was present in all four flower types, but pollen viability and stigma receptivity varied among them. Spontaneous self-pollination showed characteristics of apomixis while and the production of fruits was smaller on open and a cross-pollinated. For the germination process, seeds of the species were submitted to four treatments: seeds with dry perigon, seeds with dry perigon removed, seeds with fleshy perigon, and seeds with fleshy perigon removed. The higher percentages of germination were obtained for both treatments without perigon. Hymenopterans were the main group visiting the flowers and therefore could be acting as important pollinators.
Dissertação importada do Alexandria
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Lowe, Rupert Anthony William. "The supernumerary segment system of Rumex acetosa L. (Polygonaceae)." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620926.
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Siegwarth, Mark. "Some Thoughts from the Director: The Fascinating Family of Polygonaceae." University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/556793.
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Dunja, Jakovljević. "Biološko dejstvo vodenog ekstrakta ploda štavelja (Rumex crispus L., Polygonaceae)." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110304&source=NDLTD&language=en.
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Štavelj (Rumex crispus, Polygonaceae) je višegodišnja zeljasta biljka, koja predstavlja bogat izvor fenolnih komponenti. Iako se smatra invazivnim korovom, mlado lišće štavelja je jestivo i često se koristi kao salata. Dalje, upotreba plodova štavelja opisana je u srpskoj i turskoj narodnoj medicini u lečenju gastrointestinalnih tegoba. Cilj ovog rada bio je procena in vitro i in vivo antioksidantne/prooksidantne i citotoksične aktivnosti, i određivanje eventualnog in vitro antiinflamatornog efekta vodenog ekstrakta ploda Rumex crispus. Ukupan sadržaj flavonoida određen je spektrofotometrijskom metodom. Kvalifikacija i kvantifikacija flavonoida potvrđena je visokoefikasnom tečnom hromatografijom (HPLC). Antioksidantna aktivnost vodenog ekstrakta ploda štavelja procenjena je na osnovu in vitro testova: Ferric-reducing antioxidant power (FRAP), sposobnosti ekstrakta da neutrališe slobodne radikale NO•, OH• i DPPH• i uticaja na lipidnu peroksidaciju u lipozomima. Citotoksičnost ispitivanog ekstrakta je određena in vitro na tumorskim ćelijskim linijama: humani karcinom cerviksa (HeLa), adenokarcinom (HT-29) i adenokarcinom dojke (MCF7). Takođe, moguća in vivo hepatoprotektivna i antioksidantna svojstva ekstrakta određena su kod oksidativnog stresa izazvanog CCl4 kod eksperimentalnih životinja. Pored toga, proverena je hipoteza u kojoj testiran ekstrakt pokazuje in vivo antiproliferativnu aktivnost kod Ehrlich-ovih (EAC) i Hepatoma AS30D ćelija, merenjem zapremine ascitesa, procenta vijabilnih ćelija i nivoa nekoliko antioksidantnih enzima. Optimizovan in vitro test za određivanje potencijala inhibicije ciklooksigenaze-1 (COX-1) i 12-lipooksigenaze (12-LOX) preduzet je u svrhu procene antiinflamatornog efekta vodenog ekstrakta ploda R. crispus. HPLC analiza otkrila je da je mikvelianin najdominantniji flavonoidni konstituent ekstrakta. Testirani ekstrakt pokazao je potencijalnu antioksidantnu aktivnost rezultujući velikom moći u neutralizaciji slobodnih radikala, i sposobnošću da smanji lipidnu peroksidaciju u lipozomima. Rezultati su ukazali na tkivno-selektivnu citotoksičnost ekstrakta ploda R. crispus in vitro. Najizraženija antitumorska aktivnost primećena je prema HeLa i MCF7 ćelijskim linijama. Podaci sugerišu da bi se ispitivani ekstrakt mogao smatrati potencijalnim in vivo hepatoprotektivnim i antioksidantnim agensom, sprečavajući oksidativna oštećenja jetre. S druge strane, pomenuti ekstrakt može pokazati in vivo prooksidantna svojstva, uzrokujući oksidativni stres u maligno transformisanim EAC i AS30D ćelijama i smanjujući zapreminu ascitesa i udeo vijabilnih ćelija, u poređenju sa kontrolnom grupom. Promene u aktivnosti antioksidantnih enzima su verovatno posledica indukovanog oksidativnog stresa u EAC i AS30D ćelijama, naročito kod pretretiranih životinja. Vodeni ekstrakt ploda štavelja pokazao je COX-1, kao i 12-LOX inhibitornu aktivnost, navodeći da bi ispitivani ekstrakt mogao biti antiinflamatorni agens. Vodeni ekstrakt ploda R. crispus ima potencijalnu antioksidantnu, citotoksičnu i antiinflamatornu aktivnost. Ispoljavanje prooksidantnih svojstava predstavlja mogući mehanizam antiproliferativnog efekta ekstrakta.Curly dock (Rumex crispus, Polygonaceae) is a wild perennial herbaceous plant, which products are described as a rich source of phenolic compounds. Apart from being considered a seriously invasive weed, young leaves of curly dock are edible and often used as salad. Furthermore, the use of its fruits has been described in Serbian and Turkish traditional medicine against stomach complaints. The objectives of this study were to evaluate in vitro and in vivo antioxidant/prooxidant and cytotoxic activities, and to determine an eventual in vitro anti-inflammatory effect of the aqueous extract of Rumex crispus fruits. Total flavonoid content was determined by spectrophotometric method. Qualification and quantification of flavonoids were confirmed using High performance liquid chromatography (HPLC). The aqueous extract of curly dock fruits was evaluated for its antioxidant activity by in vitro assays for Ferric-reducing antioxidant power (FRAP), NO•, OH• and DPPH•-free radical scavenging activities and the influence on lipid peroxidation in liposomes. The cytotoxicity of tested extract was examined in vitro in human cervix carcinoma (HeLa), colon adenocarcinoma (HT-29) and breast adenocarcinoma (MCF7). Also, the potential in vivo hepatoprotective and antioxidant properties of investigated extract were determined on CCl4-induced oxidative stress in experimental animals. Furthermore, the hypothesis that the examined extract might show in vivo antiproliferative activity in Ehrlich carcinoma (EAC) and Hepatoma AS30D cells was tested by measuring volume of ascites, percentage of viable cells and level of several antioxidant enzymes. The optimized in vitro test for determination of cyclooxygenase-1 (COX-1) and 12-lipoxygenase (12-LOX) inhibition potency was undertaken in order to estimate an anti-inflammatory effect of aqueous extract of R. crispus fruits. HPLC analysis revealed miquelianin as the most abundant flavonoid constituent of the extract. The tested extract might have an antioxidant activity resulting in scavenging of free radicals and ability to decrease lipid peroxidation in liposomes. The results could indicate tissue-selective cytotoxicity of R. crispus fruit extract in vitro. The most prominent antitumor activity was observed towards HeLa and MCF7 cell lines. The data suggested that investigated extract may be considered as potential in vivo hepatoprotective and antioxidant agent due to prevention of the liver injuries induced by oxidative damage. On the other hand, mentioned extract could exhibit in vivo prooxidant property, causing the oxidative stress in malignant transformed EAC and AS30D cells and reducing volume of ascites and percentage of viable cells, in comparison with control group. Changes in activities of antioxidant enzymes might be the results of induced oxidative stress in EAC and AS30D cells, especially in the pretreated animals. The aqueous extract of curly dock fruits showed COX-1, as well as 12-LOX inhibitory activity, suggesting that tested extract might be an anti-inflammatory agent. It could be concluded that aqueous fruit extract of R. crispus might have antioxidant, cytotoxic and anti-inflammatory activities. The prooxidant properties of examined extract could be the mechanism of potential antiproliferative effect of extract.
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Taia, Wafaa K., and Sanaa A. I. Moussa. "Phenotypic Variations in Communities of Calligonum comosum L'Her (Polygonaceae) from Saudi Arabia." University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/556799.
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Vegetative community structures and phenotypic variations within Calligonum comosum L'Her communities growing in two different locations in Saudi Arabia, Nefud Al-Shakika and Al-Dahnaa, have been studied. Eleven species have been recorded in both areas; five of them were present in both locations. Ephedra elata and Convolvulus lanatus were recorded in Nefud Al-Shakika only, while Heliotropium bacciferum, Cleome arabica, Dodonaea vis cos a and Erodium gleurocophyllum were found in Al-Dahnaa only. The Importance Values of the species recorded have been calculated and cluster analyses of the studied quadrats have been conducted using TWINSPAN. Vegetative morphological characteristics showed great variation within Calligonum comosum collected from the two locations. Floral morphological characteristics were more stable, except for fruit color and hair which were different in the Calligonum comosum plants grown in the two locations. Epidermal stem secretions as well as mineral content varied in response to change in location. AN OVA tests have been carried out to evaluate the differences between the two areas. The variations in these characteristics are discussed according to the differences in climate, soil and water availability.
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Lopes, Neto José Joaquim. "Bioacessibilidade e biodisponibilidade de compostos fenólicos de sementes de Triplaris Gardneriana Wedd (Polygonaceae)." reponame:Repositório Institucional da UFC, 2017. http://www.repositorio.ufc.br/handle/riufc/23928.
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LOPES NETO, José Joaquim. Bioacessibilidade e biodisponibilidade de compostos fenólicos de sementes de Triplaris Gardneriana Wedd (Polygonaceae). 2017. 95 f. Dissertação (Mestrado em Bioquímica)- Universidade Federal do Ceará, 2017.Submitted by Weslayne Nunes de Sales (weslaynesales@ufc.br) on 2017-07-10T12:20:53Z No. of bitstreams: 1 2017_dis_jjlopesneto.pdf: 1657114 bytes, checksum: 3ec381c68cd046900e25b007ed35226a (MD5)
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Triplaris gardneriana Wedd is a plant species from Brazilian semiarid region with seeds rich in phenolic compounds and high antioxidant capacity.The consumption of fruits and vegetables has been associated to low incidence of chronic diseases caused by oxidative stress. Among the food components capable of combating excess free radicals arethe phenolic compounds, with antioxidant capacity, which have been extensively studied. However, the total quantity of these substances present in foods does not necessarily reflect the bioactive amount absorbed and metabolized by the body. In this context, the present work aimed the development of an ethanolic extract obtained from the seeds of T. gardneriana (EETg), and from this, to evaluate its antioxidant activity through different methodologies, to investigate the bioaccessibility of EETg by determination of phenolic composition before and after in vitro digestion as well as to estimate its indirect bioavailability by chemical analysis of plasma and urine in rodents after oral administration. In general, EETg presented levels of antioxidant activity by DPPH, ABTS.+, FRAP and TBARS tests comparable to those described in specialized literature. The bioaccessibility indexes of phenolic compounds in EETg were 48.65 and 69.28% in the presence and absence of enzymes, respectively. Among the identified phenolics classes, flavonoids, represented by galloylated procyanidins, proved to be more bioaccessible (81.48 and 96.29% in the post-intestinal phase with and without enzymes, respectively). The oral administration in Wistar rats resulted in a significant decrease in plasma total antioxidant capacity (TAC) by FRAP assay 4 h after beginning the experiment. As to urine analysis, an increase in TAC by DPPH and FRAP was observed from 1 and 4 h after administration, respectively. UPLC-QTOF analysis of urine detected 2 metabolites originated from the degradation of phenolic compounds: hippuric acid and phenylacetil glycine. These results suggest that phenolic compounds in T. gardneriana, despite their antioxidant potential, are unstable under gastrointestinal conditions, being flavonoids the components with higher bioaccessibility; besides that, they showed limited bioavailability due to their rapid biotransformation and urinary elimination.
Triplaris gardneriana Wedd é uma espécie vegetal do semiárido brasileiro com sementes ricas em compostos fenólicos e alta capacidade antioxidante. O consumo de frutas e vegetais tem sido associado à baixa incidência de doenças crônicas causadas por estresse oxidativo. Dentre os componentes alimentares capazes de combater o excesso de radicais livres, os compostos fenólicos, de caráter antioxidante, têm sido bastante estudados.Contudo, a quantidade total destas substâncias presente nos alimentos não reflete necessariamente a porção bioativa absorvida e metabolizada pelo organismo. Neste contexto, o presente trabalho objetivou o desenvolvimento de um extrato etanólico obtido a partir das sementes de T. gardneriana(EETg),e a partir deste,caracterizar sua composição fenólica, avaliar sua atividade antioxidante através de diferentes metodologias, além deinvestigar a bioacessibilidade in vitro dos polifenóis presentes em EETg após digestão gastrointestinal simulada e estimar a biodisponibilidade indireta dos mesmos a partir da análise química do plasma e urina em roedores após sua administração oral. Em linhas gerais, EETg apresentou níveis de atividade antioxidante pelos ensaios DPPH, ABTS.+, FRAP e TBARS comparáveis àqueles descritos naliteratura especializada. Os índices de bioacessibilidade de compostos fenólicos em EETg foram de 48,65 e 69,28% na presença e ausência de enzimas, respectivamente. Dentre as classes fenólicas identificadas, os flavonoides, representados porprocianidinas acrescidas de grupos galoil, mostraram-se mais bioacessíveis (81,48 e 96,29% na fase pós-intestinal com e sem enzimas, respectivamente). A administração oral de EETg em ratos Wistar resultou em uma significativa diminuição da capacidade antioxidante total (CAT) do plasma pelo ensaio FRAP 4 h após o início do experimento. Para as amostras de urina, um aumento naCAT pelos testes DPPH e FRAP foi observado a partir de 1 e 4 h após a administração, respectivamente. Análises por UPLC-QTOF daurina detectou 2 metabólitos oriundos da degradação de compostos fenólicos: ácido hipúrico e fenilacetil glicina. Estes resultados sugerem que os compostos fenólicos deT. gardneriana, apesar do seu potencial antioxidante, são instáveis em condições gastrointestinais, sendo flavonoides os componentes com maior bioacessibilidade. Além disto, mostraram biodisponibilidade limitada devido à sua rápida biotransformação e eliminação urinária.
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Oliveira, Patrícia Emanuella Silva de. "Estudo químico e biológico de Coccoloba mollis Casareto (1844) e Triplaris americana Linnaeus (Polygonaceae)." Universidade Federal de Alagoas, 2007. http://www.repositorio.ufal.br/handle/riufal/2550.
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This work describes the chemical and biological studies carried out using two species of plants, which belongs to the Polygonaceae family: Coccoloba mollis Casaretto (1844) and Triplaris americana Linnaeus. The study aimed to monitoring the antioxidant (DPPH, total phenolic content, reduction power by Fe3+-Fe2+ and total oxidation by FTC method), anticholinesterasic and larvicidal (4th larval instars of the Aedes aegypti) activities of extracts and isolated compounds from C. mollis and T. americana. Phytochemical investigation of some extracts with promising results in at least one of the activities mentioned above of C. mollis lead to the isolation of two phytosteroids (sitosterol and sitostenone), a diterpene (transphytol), a triterpene (simiarenol) and a benzenoid (vanilic acid); while from T. americana were isolated two benzenoids (gallic acid and protocatechuic acid methyl ester), a phenetylamide
(moupinamide), a phenylpropanoid derivative (vanicoside D), two phytosteroids (sitosterol and sitostenone), two flavonols (quercetin and 3-O-α-arabinofuranosylquercetin) and two triterpenes (friedelin and friedelinol). In general, these results have been contributed to extend the chemiotaxonomic profile of the genera Coccoloba and Triplaris, and as a consequence it increased the knowledge of the Polygonaceae. These compounds were identified on the basis of spectroscopic analyses (IR, MS and NMR, including DEPT, APT, COSY, HSQC and HMBC). Regarding the to antioxidant assays, fractions from fruits, leaves, stem and roots of T. americana showed comparable results to those presented by the standards (α-tocopherol, BHT and ascorbic acid). From active fractions extracts of the fruits were isolated four compounds that were also active (gallic acid, vanicoside D, quercetin and 3-O-α-
arabinofuranosylquercetin). The qualitative assays used to demonstrate the inhibition of the enzyme acetylcholinesterase by fractions from partition and filtration on silica gel of C. mollis (bark, leaves and stem) and of T. americana (fruits, leaves, stem and roots) showed positive results as well. Chromatographic guided-fractionation of some these fractions resulted in the isolation of seven compounds five of them (sitosterol, vanilic acid, gallic acid, protocatechuic acid methyl ester and vanicoside D) showed positive results. In the assays against 4th larval instars of the Aedes aegypti, the fractions promising more were derived from hexane extracts of stem, leaves and bark of C. mollis and from stem and roots, as well as EtOAc sub-fraction from the CHCl3 extract of fruits of T. americana. Conclusion, these results presented data that can be used in further studies.Conselho Nacional de Desenvolvimento Científico e Tecnológico
O presente trabalho descreve o estudo químico, monitorado pelas atividades antioxidantes (DPPH, quantificação de fenóis totais, poder de redução Fe3+-Fe2+ e oxidação total pelo método FTC), anticolinesterásica e larvicida (larvas do 4o ínstar do Aedes aegypti), de extratos e substâncias isoladas das espécies Coccoloba mollis Casaretto (1844) e Triplaris americana Linnaeus (Polygonaceae). A investigação fitoquímica de alguns dos extratos com resultados promissores em pelo menos uma das atividades acima mencionadas de C. mollis conduziu ao isolamento de dois fitoesteróides (sitosterol e sitostenona), um diterpeno (transfitol), um triterpeno (simiarenol) e de um benzenóide (ácido vanílico); enquanto que da espécie T. americana foram isolados dois benzenóides (ácido gálico e éster metílico do ácido protocatecóico), uma fenetilamida (moupinamida), um derivado fenilpropanóide (vanicosídeo D), dois fitoesteróides (sitosterol e sitostenona), dois flavonóis (quercetina e 3-O-α-arabinofuranosilquercetina) e dois triterpenos (fridelina e fridelinol). De um modo geral, este resultado contribuiu para ampliar o perfil químiotaxonômico dos gêneros Coccoloba e Triplaris e, conseqüentemente da química de Polygonaceae. Estas substâncias foram identificadas com base na análise de dados espectroscópicos (IV, EM e RMN, incluindo DEPT, APT, COSY, HSQC e HMBC). Em relação aos ensaios antioxidantes, as frações oriundas dos frutos, folhas, caule e raízes de T. americana apresentaram resultados comparáveis aos dos padrões utilizados (α-tocoferol, BHT e ácido ascórbico). Das frações ativas dos frutos foram isoladas quatro substâncias que também foram ativas (ácido gálico, vanicosídeo D, quercetina e 3-O-α-arabinofuranosilquercetina). No que diz respeito aos ensaios qualitativos frente à enzima acetilcolinesterase, frações oriundas de partição e de filtração em gel de sílica de C. mollis (cascas, folhas e caule) e de T. americana (frutos, folhas, caule e raízes) forneceram resultados positivos. O fracionamento cromatográfico monitorado de alguns dessas frações resultou no isolamento de sete substâncias, das quais cinco (sitosterol, ácido vanílico, ácido gálico, éster metílico do ácido protocatecóico e vanicosídeo D) forneceram resultados positivos. Nos ensaios frente larvas do 4º ínstar do Aedes aegypti, as frações mais promissoras foram em hexano do caule, folhas e cascas de C. mollis e em hexano de caule e raízes e a subfração em AcOEt, oriunda da filtração da fração em CHCl3 dos frutos de T. americana. De um modo geral, esses resultados forneceram dados que poderão servir de base para estudos posteriores.
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Pereira, Paulo Eduardo Ellert. "Estudo do gênero Polygonum L. (Polygonaceae) em áreas úmidas do extremo sul do Brasil." reponame:Repositório Institucional da FURG, 2014. http://repositorio.furg.br/handle/1/6044.
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Polygonum compreende aproximadamente 30 espécies distribuídas principalmente em regiões temperadas do hemisfério norte. Para o Brasil são aceitas 16 espécies, tipicamente de ambientes úmidos, sendo 10 registradas para o Rio Grande do Sul. A análise de caracteres morfológicos e a delimitação de espécies de Polygonum em ambientes úmidos do extremo sul do Brasil foi o objetivo deste estudo. O trabalho foi realizado com base em coletas, observações a campo e análises morfológicas pelo microscópio estereoscópico e MEV – microscópio eletrônico de varredura, em exemplares coletados e de Herbários. Foram registradas nove espécies: P. acuminatum Kunth, P. aviculare L., P. capitatum Buch.-Ham. ex D. Don, P. ferrugineum Wedd., P. glabrum Willd., P. hydropiperoides Michx., P. meisnerianum Cham. & Schltdl., P. persicaria L. e P. punctatum Elliot.. A separação das espécies se deve principalmente por características das inflorescências, como a forma, tamanho, localização e densidade de flores, forma dos frutos e presença/ausência de cílios nas ócreas. Polygonum hydropiperoides e P. punctatum são muito confundidas, distinguindo-se pelas inflorescências lineares interrompidas na base e presença de glândulas principalmente nas tépalas da última. Polygonum punctatum foi a espécie mais comum na área estudada. Por outro lado, P. persicaria mostrou ser rara no local por ter poucos indivíduos coletados, e especialmente P. aviculare, P. capitatum e P. glabrum, por só serem encontrados exemplares em herbário. O número de espécies registradas para a área estudada retrata a importância deste gênero para o extremo sul do Brasil, cuja área detém a quase totalidade de espécies registradas para o Estado.
Polygonum comprises about 30 species distributed mainly in high temperate regions of the northern hemisphere. For Brazil, 16 species are accepted, typically wet environments, being 10 recorded for the Rio Grande do Sul. The analysis of morphological characters and the delimitation of species of Polygonum in moist environments from southern Brazil was the objective of this study. The study was based on collections, field observations and morphological analyzes by stereoscopic microscope and SEM - scanning electron microscope, on specimens and in herbaria. Nine species were recorded: P. acuminatum Kunth, P. aviculare L., P. capitatum Buch.-Ham. ex D. Don, P. ferrugineum Wedd., P. glabrum Willd., P. hydropiperoides Michx., P. meisnerianum Cham. & Schltdl., P. persicaria L. and P. punctatum Elliot. Separation of species is mainly by characteristics of inflorescences, such as shape, size, location and density of flowers, fruit shape and presence/absence of cilia in ochreas. Polygonum hydropiperoides and P. punctatum are very confused, but are distinguished by linear inflorescences interrupted at the base and presence of glands especially in the last tepals. Polygonum punctatum was the most common species in the study area. On the other hand, P. persicaria shown to be rare in place by having a few individuals collected, especially P. aviculare, P. capitatum and P. glabrum, by being found only in herbarium specimens. The number of species recorded for the study area portrays the importance of this genre to the extreme southern Brazil, whose area holds almost all the species recorded for the State.
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Vilela, Lívia Santiago Teixeira. "Avaliação do potencial antimicrobiano in vitro das espécies vegetais Coccoloba mollis Casaretto, Tripalis americana Linnaeus, e Coutarea hexandra (Jacq.) K. Schum." Universidade Federal de Alagoas, 2011. http://repositorio.ufal.br/handle/riufal/956.
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Infections caused by microorganisms are a serious public health problem, mainly due to the emergence of multi drug resistant bacteria and fungi. Thus, the search for new alternative therapeutic approaches remains, being the goal of several research groups worldwide. The World Health Organization (WHO) recognizes the value and encourages the use of traditional medicine knowledge. Brazil has a large number of plant species and many of them are considered medicinal. However, despite quite a lot of them are popularly used they were not scientifically validated yet. The Northeast region hosts an extensive native flora with many species showing therapeutic properties, but most of them scientifically unproven. As an example, there were representatives of the families Rubiaceae and Polygonaceae, the latter being the fourth largest family between angiosperms. Amongst Alagoas flora there are species of these two families, such as Coccoloba mollis Casaretto (1844) (Polygonaceae), Triplaris americana Linnaeus (Polygonaceae) and Coutarea hexandra Schum. (Rubiaceae), which genera have species cited by its ethnomedicinal uses. The aim of this study was to evaluate the antimicrobial activity of crude extracts and fraction obtained from these plant species. Tests were carried out in Petri dishes by the disk diffusion method to evaluate relative effectiveness of tested samples as antimicrobial agents, by measuring zones of inhibition on culture of Staphylococcus aureus (ATCC 25923), Pseudomonas aeruginosa (ATCC 27853) e Candida albicans (ATCC 10231). The minimal inhibitory concentration (MIC) was determined by microdilution in BHI broth (Brain Heart Infusion). Plant species were also tested against Artemia salina larvae for preliminary evaluation of its acute toxicity. Of the 69 samples tested, 17 were effective against S. aureus. The methanol fraction from the dichloromethane extract of the roots of C. hexandra was considered the most promising because it presented the highest percentage bacterial growth inhibition. Of the samples subjected to MIC determination all were active with values ranging from 125 to 500 μg/mL. None of the tested species were active against P. aeruginosa or C. albicans. Regarding the toxicity on A. salina, in preliminary tests 32 of the 69 tested samples were non-toxic. The others were submitted to quantitative test 10 of them exhibited non-toxic effects. Among the samples that showed toxicity LC50 values ranged from 2.68 to 953.9 g/mL. The three plant species showed antibacterial activity against S. aureus. For toxicity against A. salina, the 27 toxic samples, 17 are species of the family Polygonaceae, and the rest of the species C. hexandra were toxicFundação de Amparo a Pesquisa do Estado de Alagoas
As infecções causadas por microrganismos são um sério problema de saúde pública, principalmente devido emergência de bactérias e fungos multiresistentes. Portanto, permanece a necessidade da busca de novas alternativas de tratamento, objetivo de vários grupos de pesquisa no mundo. A Organização Mundial de Saúde (OMS) reconhece o valor e incentiva o aproveitamento do conhecimento tradicional. O Brasil possui um grande acervo vegetal, e muitas plantas são consideradas medicinais. No entanto, apesar de várias delas serem utilizadas popularmente ainda não foram validadas cientificamente. A região Nordeste abriga uma vasta flora nativa com muitas espécies com propriedades terapêuticas, porém a maior parte ainda sem comprovação científica. Como exemplo, citam-se representantes das famílias Polygonaceae e Rubiaceae, sendo esta última a quarta família de maior diversidade entre as angiospermas. Na flora Alagoana encontram espécies destas duas famílias, como a Coccoloba mollis Casaretto (1844) (Polygonaceae), Triplaris americana Linnaeus (Polygonaceae) e Coutarea hexandra Schum. (Rubiaceae), cujos gêneros possuem espécies com registros sobre seu uso etnomedicinal. O objetivo deste trabalho foi avaliar a atividade antimicrobiana de extratos brutos e frações obtidas destas espécies vegetais. Os testes foram conduzidos em placas de Petri pelo método de difusão em disco para avaliar o potencial antimicrobiano das amostras testadas, pela formação de halo de inibição frente à cultivos de Staphylococcus aureus (ATCC 25923), Pseudomonas aeruginosa (ATCC 27853) e Candida albicans (ATCC 10231). A concentração inibitória mínima (CIM) foi determinada pela técnica de microdiluição em caldo BHI (infusão de cérebro e coração). As espécies vegetais foram também testadas para avaliação preliminar de sua toxicidade aguda, frente a larvas de Artemia salina. Das 69 amostras testadas, 17 delas apresentaram atividade contra S. aureus, a fração em metanol proveniente de extrato em diclorometano da raiz de C. hexandra foi considerada a mais promissora por ter apresentado maior percentual de inibição do crescimento bacteriano. Submetidas a determinação da CIM todas foram ativas com valores entre 125 e 500 μg/mL. Nenhuma das espécies vegetais apresentou atividade contra P. aeruginosa, ou contra C. albicans. Com relação à toxicidade frente A. salina, das 69 amostras submetidas ao teste preliminar 32 foram atóxicas. As demais foram submetidas ao teste quantitativo sendo 10 atóxicas. Entre as amostras que apresentaram toxicidade os valores de CL50 variaram de 2,68 a 953,9 g/mL. As três espécies vegetais apresentaram atividade antibacteriana frente S. aureus, com relação a toxicidade frente A. salina, das 27 amostras tóxicas, 17 são das espécies da família Polygonaceae, e as demais da espécie C. hexandra foram tóxicas.
Books on the topic "Polygonaceae A"
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Qaiser, M. Polygonaceae. Karachi: Dept. of Botany, University of Karachi, 2001.
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Pendry, Colin A. Monograph of Ruprechtia (Polygonaceae). Ann Arbor, MI: American Society of Plant Taxonomists, 2004.
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Park, Chong-Wook. Taxonomy of Polygonum section Echinocaulon (Polygonaceae). Bronx, N.Y., U.S.A: New York Botanical Garden, 1988.
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Franz, Oberwinkler, ed. Ustilaginales on Polygonaceae, a taxonomic revision. Berlin: J. Cramer, 1994.
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Mondal, M. S. Pollen morphology and systematic relationship of the family Polygonaceae. Calcutta: Botanical Survey of India, 1997.
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Hong, Suk-Pyo. Taxonomy of the genus Aconogonon (Polygonaceae) in Himalaya and adjacent regions. Uppsala: [Uppsala University], 1992.
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Tōkyō Daigaku. Sōgō Kenkyū Hakubutsukan. Catalogue of the type specimens preserved in the herbarium, Department of Botany, The University Museum, The University of Tokyo: Polygonaceae : Tade-ka / Boku Chinʼiku ... [et al.]. Tokyo: The University Museum, The University of Tokyo, 2011.
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Pandith, Shahzad A., Mohd Ishfaq Khan, and Salika Ramazan. Genus Rheum (polygonaceae). Taylor & Francis Group, 2021.
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Timberlake, Jonathan. Polygonaceae and Myricaceae. Kew Publishing, 2006.
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Zhang, Xiaoping. Zhongguo liao ke hua fen di xi tong yan hua. Zhongguo ke xue ji shu da xue chu ban she, 1998.
Find full textBook chapters on the topic "Polygonaceae A"
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Xu, Zhenghao, and Meihua Deng. "Polygonaceae." In Identification and Control of Common Weeds: Volume 2, 171–243. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1157-7_23.
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Grigore, Marius-Nicusor, Lacramioara Ivanescu, and Constantin Toma. "Polygonaceae." In Halophytes: An Integrative Anatomical Study, 257–67. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05729-3_9.
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Hegnauer, Robert. "Polygonaceae." In Chemotaxonomie der Pflanzen, 268–85. Basel: Birkhäuser Basel, 1990. http://dx.doi.org/10.1007/978-3-0348-9256-8_54.
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Schweingruber, Fritz H., Andrea Kučerová, Lubomír Adamec, and Jiří Doležal. "Polygonaceae." In Anatomic Atlas of Aquatic and Wetland Plant Stems, 199–207. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33420-8_44.
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Kaul, Mohan L. H. "Polygonaceae." In Male Sterility in Higher Plants, 736. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83139-3_43.
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Schweingruber, Fritz Hans, Miroslav Dvorský, Annett Börner, and Jiří Doležal. "Polygonaceae." In Atlas of Stem Anatomy of Arctic and Alpine Plants Around the Globe, 253–60. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53976-4_37.
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Brandbyge, J. "Polygonaceae." In Flowering Plants · Dicotyledons, 531–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02899-5_63.
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Smith, Nigel. "Polygonaceae." In Amazon Fruits: An Ethnobotanical Journey, 1081–85. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12803-5_42.
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Pandith, Shahzad A., and Mohd Ishfaq Khan. "Phytochemistry." In Genus Rheum (Polygonaceae), 47–74. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9780429340390-4.
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Pandith, Shahzad A., and Mohd Ishfaq Khan. "Pharmacology." In Genus Rheum (Polygonaceae), 75–106. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9780429340390-5.
Full textConference papers on the topic "Polygonaceae A"
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Оrlova, J. V., Е. А. Sukholozova, Yu Yu Кulakova, and V. G. Кulakov. "Plants of the buckwheat family (Polygonaceae), pink family (Caryophyllaceae), poppy family (Papaveraceae), in exported grain products." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-138.
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The grain market is an important segment of the Russian economy. Export plant products must comply with the phytosanitary requirements of the importing countries. Analysis of phytosanitary requirements of importing countries, identification of weeds of natural flora from the families Polygonaceae, Caryophyllaceae andРapaveraceae, as well as their distribution in Russia and their availability in grain products are discussed in the work.
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Гладкая, Алла, and Тудор Настас. "Исследование фитостимулирующих свойств растительных экстрактов." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.10.
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We have investigated the phytostimulating properties of Rheum officinale Baill. (Polygonaceae) root and leaves water-ethanol extracts and Azadirachta indica A. Juss. (Meleaceae) seed oil extract, which contain a wide range of bioactive substances. Experiments to determine the effect of treatment with extracts of Cucumis sativus seedlings were carried out in laboratory conditions. The composition V6 (1%R + 0,5%L) showed the maximum phytostimulating effect, which increased the plant height by 34,5%, and the number of flowers by 89,6%.
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Markova, T. O., and A. S. Sakhnov. "Analysis of the chemical composition of plants of the Polygonaceae family used in the nutrition of oxalid bugs Coreus marginatus orientalis (Kiritschenko) (Heteroptera, Coreidae) in the territory of Southern Primorye." In Животный и растительный мир Дальнего Востока. Publishing House of the Far Eastern Federal University, 2020. http://dx.doi.org/10.24866/7444-4121-0/7-10.
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Жучков, Д. В., and Д. М. Фетисов. "Актуальные вопросы изучения растительного покрова малых и средних городов России." In III молодёжная всероссийская научная конференция с международным участием «PLANTAE & FUNGI». Botanical Garden-Institute FEB RAS, 2023. http://dx.doi.org/10.17581/paf2023.72.
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В рамках отечественных исследований закономерностей формирования и распространения растительного покрова и оптимизации способов его использования на урбанизированных территориях наблюдается рост актуальности изучения малых и средних городов. В результате анализа порядка 60 публикаций и статистических материалов за период с 2010 по 2022 гг., представленных в российских электронных научных библиотеках Elibrary, ResearchGate, Google Scholar, обсуждаемые сегодня вопросы изучения растительного покрова, рассматриваемой категории городов России были объединены в несколько направлений: Видовое богатство урбанофлоры и ее структуры. За указанный период найдено и проанализировано 50 публикаций и статистических материалов, в которых отражены полные списки видов урбанофлоры для 86 городов (18 малых и 68 средних). Видовое богатство колеблется от 140 (г. Анива, Сахалинская область) до 786 (г. Ливны, Орловская область). В 6 городах отмечено до 200 видов растений, в 37 – от 201 до 400, в 27 – от 401 до 600 и только в 12 зарегистрировано свыше 600 видов [3]. Как отмечают специалисты, разница в количестве зависит от многих факторов: площади и численности населения города, возраста населенного пункта, природно-климатических условий и др. [1, 5, 6]. Однако нами не выявлено тесных корреляционных связей между факторами. В структуре урбанофлоры преобладают семейства: Asteraceae, Poaceae, Rosaceae, Fabaceae, Brassiaceae, Cyperaceae, Сaryophyllaceae, Apiaceae, Polygonaceae, Ranuncllaceae [3]. Аборигенная и адвентивная (чужеродная) фракция урбанофлоры. В анализируемых научных публикациях отмечено, что в среднем на долю аборигенной и адвентивной фракции приходится 71% (317 видов) и 29% (130) соответственно. В урбанофлоре 7 городов отмечается до 200 аборигенных видов, в 37 – от 201 до 400 и в 8 городах свыше 400. Что касается адвентивных, то в 42 городах отмечено не больше 200 видов и только в 5 – от 201 до 400. В связи с тем, что в некоторых городах процесс адвентизации достигает 40-50%, актуальным является организация охраны аборигенных, в том числе редких и охраняемых видов. Это связано с их приспособленностью к внешней среде, а также они поддерживают устойчивость биоразнообразия [3]. Охрана урбанофлоры. В урбанофлоре малых и средних городов - Абазы (Республика Хакасия) 8 видов занесены в Красную книгу (6 – Красная книга России и 2 – региональная), Кинешма (Ивановская область) 2 вида в региональной Красной книге, Кумертау (Республика Башкортостан) 11 видов занесено в Красную книгу России, Мелеуз (Республика Башкортостан) 10 видов и другие. В некоторых городах отмечены редкие и охраняемые виды: Гаврилов Посад (Ивановская область) 24 вида, Кадников (Вологодская область) 74 вида отнесены к статусу «редкие», 34 – «охраняемые» и для 40 видов необходим ботанический контроль, Сенгилей (Ульяновская область) – 19 редких видов и другие. В настоящее время в городах активно организуется сеть ООПТ различного типа (памятники природы, ботанические сады, дендрарии, парки и другие). Однако большинство публикаций по данному направлению касается больших и крупных городов. Отмечено всего 4 средних города, имеющих ООПТ – Туапсе и Геленджик (Краснодарский край), Биробиджан (ЕАО), Магадан (Магаданская область) [4, 6].