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| Registros recuperados: 91 | |
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| Riina, R.; Berry, P.E.. |
| Croton maasii, a new species from South America, is described and illustrated. The species is only known from terra firme forests of the extreme western Amazonian region, in W Brazil and adjacent E Peru. Croton maasii resembles C. pachypodus, a more abundant and widely distributed species in the Neotropics, but differs from it in its much smaller fruits, foliage colour, less dense leaf indumentum, and a more even position of the petiolar glands. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Amazon; Brazil; Croton; Euphorbiaceae; Peru; Taxonomy; Tropical South America. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/525654 |
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| Bulalacao, L.J.; Ham, R.W.J.M. van der. |
| In order to evaluate pollen morphological descriptions of Alchornea in the literature, which are almost completely based on African and American species, the pollen of eight Southeast Asian species of Alchornea was investigated, using light and scanning electron microscopy. Very little variation appeared to be present in the Asian material. Slightly deviating from the scabrate ornamentation type are A. kelungensis (psilate) and A. rugosa (striate-rugulate). The scabrate type is also found in A. castaneaefolia (Brazil), A. hirtella (Liberia) and A. obovata (Colombia). The operculate Alchornea pollen type, which can be easily recognised using light microscopy, seems to represent a diagnostic character for the tribe Alchornieae (pollen of Bossera unknown).... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Alchornea; Euphorbiaceae; Fossil record; Pollen; SE Asia. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/525434 |
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| Aarestrup,J.R.; Karam,D.; Corrêa,E.J.A.; Fernandes,G.W.. |
| A avaliação da qualidade fisiológica de sementes é um aspecto importante para o controle das plantas daninhas. Objetivou-se verificar a viabilidade de sementes de Euphorbia heterophylla resistentes e suscetíveis a herbicidas, após serem armazenadas durante 14 meses, por meio da aplicação dos testes de germinação e tetrazólio. Foi analisada a germinação na ausência e presença de luz, em temperatura constante (25 ºC). Para o teste de tetrazólio, as sementes foram seccionadas longitudinal-diagonalmente, colocadas em placas de Petri contendo solução de tetrazólio a 1%, envoltas em papel-alumínio e mantidas a 30 ºC, no escuro e em estufa, por 18 horas. Não foram observadas diferenças significativas entre os biótipos resistentes e suscetíveis de E. heterophylla... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dormência; Euphorbiaceae; Germinação; Planta daninha; Resistência; Tetrazólio. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000300006 |
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| WAHEED,K.; MUHAMMAD,S.K.; SHOMAILA,A.; MUHAMMAD,Z.; IZHAR,U.; ULLAH,S.. |
| ABSTRACT: Medicinal Plants have been used throughout the world by human beings as a drug and remedies for various diseases since time immemorial. A study was planned to count into the antimicrobial activity and phytochemical screening of Euphorbia helioscopia. The plants were gathered and tested against some standard strains and some human pathogenic microorganisms i.e Escherichia coli, Bacillus Subtilis, Staphylococcus aureus, Klebsiella pneumoniae, Salmonella typhi, Pseudomonas aeruginosa and three fungal strain Trichoderma, R hizopus nigricans, Aspergillus niger. The concentrations of extracting samples (500 and 1,000 mg mL-1) were used against pathogens. Ciprofloxacin was used as positive control in case of bacterial strains and Colfrimazol was used... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ayurvedic; Euphorbiaceae; Labeena; Secondary metabolites; Indigenous. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100211 |
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| Aarestrup,J.R.; Karam,D.; Fernandes,G.W.; Corrêa,E.J.A.. |
| O objetivo deste estudo foi verificar os efeitos do chlorimuron-ethyl, inibidor da enzima acetolactato sintase (ALS), no crescimento foliar (largura e comprimento) e em altura de plantas de Euphorbia heterophylla suscetíveis e resistentes aos herbicidas inibidores da ALS, aos 30 dias após a aplicação do herbicida. O experimento foi conduzido em casa de vegetação, utilizando-se o delineamento inteiramente casualizado, com 11 repetições por dose aplicada do herbicida. Foram observadas respostas diferenciais entre os biótipos. As características analisadas variaram segundo a dose utilizada do herbicida. Nenhuma das doses experimentais, incluindo a comercial, foi capaz de controlar, eficientemente, o desenvolvimento das plantas resistentes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbiaceae; Herbicida; Planta daninha; Resistência; ALS. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400023 |
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| NÚÑEZ FRÉ,F.R.; JUAN,V.F.; SAINT ANDRÉ,H.M.; CHANTRE,G.R.. |
| ABSTRACT: David’s Spurge is an spring-summer annual weed, present in the central area of Buenos Aires Province, Argentina. Field studies were carried out during 2011/12 and 2013/14 to assess demography and population dynamics and determine a thermal time scale of this species. At the experimental site, 1 m² quadrants were established as observational plots, four per cohort. The number of individuals at each phenological stage and from each cohort was recorded weekly. At the end of the experiment, all plots were harvested, and seed production was determined. A thermal time scale was established to identify the occurrence of the different phenological events. Three cohorts were detected, the first one emerged in mid-October, the second one in early November,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cohort; EUDA5; Life table; Weed; Thermal time; Euphorbiaceae. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100288 |
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| Cazetta,Eliana; Zumstein,Liliane S.; Melo-Júnior,Tadeu A.; Galetti,Mauro. |
| Dehiscent fruits of Euphorbiaceae usually have two stages of seed dispersal, autochory followed by myrmecochory. Two stages of Margaritaria nobilis seed dispersal were described, the first stage autochoric followed by ornithocoric. Their dehiscent fruits are green and after they detached from the tree crown and fall on the ground, they open and expose blue metallic cocas. We studied the seed dispersal system of Margaritaria nobilis in a semi-deciduous forest in Brazil. In 80 h of focal observations, we recorded only 12 visits of frugivores, however the thrush Turdus leucomelas was the only frugivore that swallowed the fruits on the tree crown. Pitylus fuliginosus (Fringilidae) and Pionus maximiliani (Psittacidae) were mainly pulp eaters, dropping the seeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbiaceae; Frugivory; Mimetic fruits; Seed dispersal; Secondary compounds. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200012 |
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| Cardoso-Lopes,Elaine Monteiro; Paula,Daisy Maria Bentes de; Barbo,Fausto Erritto; Souza,Amanda de; Blatt,Cecília Terumi Teradaira; Torres,Luce Maria Brandão; Young,Maria Cláudia Marx. |
| Pera glabrata (Schott) Baill. was selected for this study after showing a preliminary positive result in a screening of Atlantic Forest plant species in the search for acetylcholinesterase inhibitors and antifungal compounds. The bioassays were conducted with crude ethanol extract of the leaves using direct bioautography method for acetylcholinesterase and antifungal activities. This extract was partitioned with hexane, chloroform and ethyl acetate solvents. The active chloroform fraction was submitted to silica gel chromatography column affording 12 groups. Caffeine, an alkaloid, which showed detection limits of 0.1 and 1.0 µg for anticholinesterasic and antifungal activities, respectively, was isolated from group nine. After microplate analyses, only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 9-hydroxy-4-megastigmen-3-one; Biological activities; Caffeine; Euphorbiaceae. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400019 |
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| Silva,Givanildo Z. da; Vieira,Vanessa A. C.; Boneti,João E. B.; Melo,Lilian F.; Martins,Cibele C.. |
| ABSTRACT The objective of this work was to evaluate the effect of temperature and substrate on the germination of P. volubilis seeds. Seeds harvested from 25 matrix plants were submitted, in two studies, to conditions of (i) sowing in rolled paper towel at the temperatures of 10, 15, 20, 25, 30, 35, 40, and 45 °C, for the evaluation of germination, first count of germination, germination speed index and mean time for germination, and (ii) sowing in the substrates paper towel, sand, Bioplant®, Bioplant® and micron, superfine, fine, medium and coarse vermiculite. The same evaluations mentioned in the first study were conducted at the temperature of 30 oC, as well as plant growth. The treatment replicates were distributed in a completely randomized block... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sacha inchi; Oil crop; Euphorbiaceae; Omega-3; Amazon plant. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001101031 |
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| SUDA,CECILIA N.K.; GIORGINI,JARBAS F.. |
| Seed composition and reserve mobilization were investigated in wild poinsettia (Euphorbia heterophylla L.). Lipids, around 60% of seed dry mass, are the major reserve. Proteins, including albumins (49%), salt insoluble globulins (30%), salt-soluble globulins (21%) and prolamins (0.3%), comprise about a quarter of seed dry mass. Soluble sugars comprise about 3.6% of seed dry mass, sucrose being the predominant sugar. Starch was not detected in the endosperm of E. heterophylla. Lipid depletion starts after initial imbibition, and is completed between 72 and 96 hours. Protein fractions exhibit different degradation patterns, salt-soluble globulins being continuously degraded after the start of imbibition whereas salt insoluble fractions are degraded between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; Wild poinsettia; Euphorbiaceae; Proteins; Lipids; Carbohydrates. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300006 |
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| Carvalho,Fabianno Cavalcante de; Araújo Filho,João Ambrósio de; Garcia,Rasmo; Pereira Filho,José Morais; Albuquerque,Vanda Moreira de. |
| O trabalho foi conduzido na Embrapa Caprinos, em Sobral, Ceará, com o objetivo de avaliar os efeitos do corte da parte aérea em relação à altura da rebrota na sobrevivência, persistência e no vigor da rebrota do marmeleiro e produção subseqüente de fitomassa do estrato herbáceo. O corte das plantas foi realizado a 10,0 cm de altura, quando suas rebrotas alcançaram quatro diferentes alturas (25, 50, 75 e 100 cm). Os tratamentos de corte foram aplicados em parcelas de 5 m x 30 m. A avaliação da mortalidade das plantas foi realizada mediante a contagem de todas as plantas mortas e vivas dentro das parcelas experimentais. Os dados foram analisados por intermédio do teste não-paramétrico do qui-quadrado. Verificou-se que houve dependência entre a mortalidade... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arbusto; Caatinga; Controle fisiológico; Euphorbiaceae. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000400004 |
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| Pedraza Sánchez,Erik Alexander; Cayón Salinas,Daniel Gerardo. |
| La Jatrofa o piñón (Jatropha curcas L.) es una planta oleaginosa que ha adquirido importancia en Colombia por su alta producción y calidad de aceite para biocombustibles, despertando el interés en la investigación de su fisiología y desempeño productivo. El estudio se realizó en dos zonas de producción (Vichada y Santander, Colombia) y en él se midieron la altura de la planta, el número de tallos, el área foliar, el peso seco de la hoja, el área foliar específica, el peso foliar específico, el porcentaje y perfil de ácidos grasos del aceite. Se utilizó un diseño experimental completamente al azar en el cual se consideraron dos zonas de producción, tres repeticiones y seis plantas por repetición. Las condiciones de las zonas de producción influyeron en el... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Euphorbiaceae; Plantas oleaginosas; Área foliar; Peso foliar específico; Ácidos grasos; Biodiesel. |
| Ano: 2010 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000100004 |
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| RODRIGUES,Haroldo Silva; BORÉM,Aluízio; VALENTE,Mágno Sávio Ferreira; LOPES,Maria Teresa Gomes; CRUZ,Cosme Damião; CHAVES,Francisco Célio Maia; BEZERRA,Caroline de Souza. |
| ABSTRACT Sacha inchi (Plukenetia volubilis) is native to the Amazon region and has a high seed content of mono and polyunsaturated fatty acids, making it interesting for the pharmaceutical and cosmetic industry. The purpose of this study was to analyze sacha inchi genetic diversity and describe accessions based on phenotypic characteristics. Fruits and seeds of 25 accessions from the sacha inchi genebank of Embrapa Amazônia Ocidental in Manaus, Amazonas state, were sampled and biometrically measured. The data were subjected to analysis of variance, Mahalanobis distance, canonical correlation, and genetic diversity among and within accessions by analysis of molecular variance (AMOVA). There were significant differences among the means of the analyzed... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Euphorbiaceae; Biometrics; Amazon region; Genetic resources. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000200093 |
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| Registros recuperados: 91 | |
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