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| Registros recuperados: 147 | |
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| Haddad,Fernando; Maffia,Luiz A.; Mizubuti,Eduardo S. G.. |
| A antracnose foliar causada por Colletotrichum gloeosporioides é a doença mais importante da cebolicultura (Allium cepae) em Guidoval e Guiricema, MG. Para controle da doença, utilizam-se intensivamente fungicidas, principalmente benomil (Ben), o que tem sido pouco efetivo. Neste trabalho, testou-se a hipótese da existência de isolados de C. gloeosporioides resistentes ao Ben e se comparou a eficiência de diferentes fungicidas no controle do patógeno. Nas concentrações testadas, Ben impediu o crescimento micelial do fungo, e a germinação de conídios decresceu com o aumento da concentração do produto. Independente do isolado do patógeno e da concentração dos fungicidas, ocorreu maior inibição da germinação com Tiofanato metílico (Tm) + Mancozeb (Man), Man,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Controle químico; Manejo; Allium cepa. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000400016 |
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| Piraneque G.,Nelson V.; Aguirre F.,Sonia E.; Menjivar F.,Juan C.. |
| RESUMEN El objetivo del estudio fue determinar la evolución del contenido de nutrientes en suelos destinados al cultivo comercial de cebolla de bulbo (Allium cepa) en el municipio de Tibasosa, Boyacá. En un suelo sulfic endoaquepts se establecieron tres tratamientos: Sin fertilización (T1), con fertilización convencional de la zona (T2) y fertilización con base en el análisis de suelos (T3). Se recolectaron muestras para análisis 20 días antes de la siembra y a los 45, 90 y 120 días después de la siembra (DDS). Los contenidos de macroelementos se presentaron en el orden N>Ca>K>Mg>S>P y los de micronutrientes Mn>Fe>Zn>Cu>B existiendo interacciones positivas entre N/Fe, P/K, P/Ca, P/Mg, K/Mg, K/S, Mg/S, B/Zn y Cu/Mn y negativas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Sulfic endoaquepts; Fertilidad. |
| Ano: 2007 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122007000100037 |
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| Corrêa,Natália Silveira; Bandeira,Juliana de Magalhães; Marini,Patrícia; Borba,Isabel Cristina Gouvea de; Lopes,Nei Fernandes; Moraes,Dario Munt de. |
| The germination and development of several plant species can be limited when those plants are grown in soils with high salinity, which reduces seedling viability and vigor, as well as activating the antioxidant defense system. The aim of this study was to evaluate germination, initial growth and activity of antioxidant enzymes (superoxide dismutase, catalase and ascorbate peroxidase) in seedlings of three onion cultivars (Madrugada, Fepagro 27 and Petroline) exposed to different concentrations of NaCl (0, 40, 80, 120 and 160 mM). Seedlings were evaluated for viability, vigor and antioxidant enzyme activity. The experimental procedures were completely randomized in 3 × 5 factorial design, with each treatment performed in triplicate, at a significance level... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Growing; Oxidative stress; Germination; NaCl. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200013 |
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| Düsman, Elisângela; Universidade Estadual de Maringá; Faria, Juliana Sala de; Universidade Estadual de Maringá; Toledo, Fabiana; Universidade Estadual de Maringá; Mazeti, Camila Montoro; Universidade Estadual de Maringá; Gonçalves, Marcus Eduardo Kamide; Universidade Estadual de Maringá; Vicentini, Veronica Elisa Pimenta; Universidade Estadual de Maringá. |
| The increase in consumption of water, the destruction of riparian forests and the pollution caused by humans, have severely degraded several water resources. Numerous stream crisscross the city of Maringá, Paraná state, Brazil and most of their sources are scattered through the urban region. Current analysis assesses the cytotoxic potential of water from the Corregozinho, Isalto, Morangueira and Ozório streams, located within the high-populated northeastern region of Maringá, inside the urban perimeter. Root meristematic cells of Allium cepa were used as test-system. The roots of onion were prepared by Feulgen’s reaction and stained with Schiff's reagent. Results showed that there were no statistically significant changes evaluated by the chi-square test... |
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Palavras-chave: 2.02.00.00-5; 2.02.06.00-3 environmental mutagenesis; Water contamination; Allium cepa Mutagênese environmental mutagenesis; Water contamination; Allium cepa. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4924 |
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| Biruk,Lucía Nadia; Moretton,Juan; Filippetto,Javier; Etcheverry,Jimena; Weigandt,Cristian; Fabrizio de Iorio,Alicia; Magdaleno,Anahí. |
| El Río Matanza-Riachuelo y sus afluentes atraviesan zonas con diferente grado de contaminación generada por las actividades agrícola-ganaderas, urbana e industrial. Los contaminantes que llegan al agua y son depositados en los sedimentos pueden ser liberados nuevamente al agua generando efectos tóxicos y/o genotóxicos sobre los organismos acuáticos. El objetivo de este trabajo fue analizar la genotoxicidad de muestras de sedimentos de la cuenca Matanza-Riachuelo obtenidas de zonas con diferentes usos del suelo. Se seleccionaron cuatro sitios de muestreo. Se utilizaron 2 métodos de extracción de contaminantes (agitación y sonicación), 2 solventes orgánicos (metanol y diclorometano) y 2 solventes inorgánicos (agua y solución ácida), obteniéndose un total de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Test de Ames; Allium cepa; Genotoxicidad; Sedimentos. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432016000100005 |
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| Zimmermann Prado Rodrigues,Gabriela; Dalzochio,Thaís; Gehlen,Günther. |
| O estudo avalia a toxicidade, citotoxicidade, genotoxicidade e análises físico-químicas e microbiológicas de amostras de águas coletadas em dois pontos (nascente e foz) do Rio da Ilha - um dos principais afluentes do Rio dos Sinos, RS, Brasil - em dois períodos: inverno (2014) e verão (2015), através do bioensaio com Allium cepa que fornece esses dados através da mensuração das raízes dos bulbos, índice mitótico e presença de aberrações cromossômicas. Os resultados demonstraram níveis de citotoxicidade principalmente na foz do rio, e alguns parâmetros (DBO5, fósforo, alumínio, chumbo, ferro, níquel e coliformes termotolerantes) acima da legislação estabelecida, mesmo a região sofrendo pouco impacto de origem antrópica. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rio da Ilha; Allium cepa; Citotoxicidade; Biomonitoramento. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432016000200002 |
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| Barros Rocha,Romário; Ana Paula,Peron; Silva Santos,Fabelina Karollyne; Mendes Marques,Márcia Maria; Silva Sousa,Maria Eduarda; de Oliveira,Valtânia Ana; do Nascimento,Andressa Larissa. |
| Food flavorings in general are few studied for the toxicological aspect. This condition justifies toxicity, cytotoxicity and genotoxicity assessments of the substances. In the present study, the toxicity of banana, cherry and hazelnut flavorings was evaluated in meristematic cells of roots of Allium cepa, in pure form (as marketed) and in the concentrations of 12.5; 25 and 50%, after 24 and 48 hours of exposure. Toxic potential of these food additives was also evaluated against Artemia salina nauplii at concentrations of 0.78; 1.56; 3.12; 6.25; 12.5; 25 and 50%, after 24 hours of exposure. The three additives, in all treatments and times of analysis considered, caused significant inhibition of cell division in A. cepa, however did not cause cellular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aroma and flavor; Potential toxicicity; Allium cepa; Artemia salina. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432018000200002 |
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| TEDESCO,MARÍLIA; KUHN,ANDRIELLE W.; FRESCURA,VIVIANE DAL-SOUTO; BOLIGON,ALINE A.; ATHAYDE,MARGARETH L.; TEDESCO,SOLANGE B.; SILVA,ANTONIO C.F. DA. |
| ABSTRACT The purpose of this study was to evaluate the antiproliferative and antigenotoxic activity of Sambucus australis Cham. & Schltdl. aqueous extracts on the cell cycle of Allium cepa L. as well as determine the phenolic compounds in such extracts. S. australis inflorescences and leaves of two accessions were used for aqueous extract preparation at concentrations: 0.003 g/ml and 0.012 g/ml. A. cepa bulbs were rooted in distilled water and, subsequently, placed in treatments for 24 hours. Rootlets were collected and fixed in modified Carnoy’s solution for 24 hours and kept. The squash technique was performed for slide preparation. Root tips were smashed and stained with 2% acetic orcein, and a total of 4000 cells per treatment were analyzed. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Medicinal plants; Mitotic index; Allium cepa; Sabugueiro; High-performance liquid chromatography. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502141 |
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| CARVALHO,FRANCISCO R.S.; MOURA,ANTONIO G.; RODRIGUES,GARDENIA F.; NUNES,NARCIA M.F.; LIMA,DAISY J.B.; PESSOA,CLAUDIA; COSTA,MARCILIA P.; FERREIRA,PAULO M.P.; PERON,ANA PAULA. |
| ABSTRACT The objective of this study was to evaluate the antiproliferative, cytotoxic and genotoxic potential of salty liquid synthetic flavorings of Butter, Cheddar Cheese and Onion. The antiproliferative potential (2.9-1500 µg/mL) was assessed by MTT assay after 72h using the human tumor lines SF-295 (glioblastoma), OVCAR-8 (ovarian), HCT-116 (colon) and HL-60 (promyelocytic leukemia) and primary cultures of murine Sarcoma 180 (S180) and peripheral blood mononuclear cells (PBMC). Allium cepa bulbs were exposed to growing respective doses (1 mL and 2 mL). Only Butter and Cheddar flavorings revealed cytotoxic activity on cancer cells, with IC50 values ranging from 125.4 µg/mL (Cheddar - HCT-116) to 402.6 µg/mL (Butter - OVCAR-8). Butter flavoring was the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food additives; Allium cepa; Antiproliferative action; Neoplasic cells; Toxicity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401419 |
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| Rainho,Claudia R. de; Kaezer,Andréa; Aiub,Claudia A.F.; Felzenszwalb,Israel. |
| N-nitroso compounds, such as N-nitrosodiethylamine (NDEA), can be formed by the reaction of secundary amines with nitrosating agents, and are suspected to be involved in tumors in humans. NDEA has been considered a weak carcinogen in genotoxic assays probably due to the inefficient nitrosamine activation system that is used and/or to the efficient repair system. In this work, we evaluated the sensibility of Allium cepa L. root tips and Tradescantia stamen hair mutation assay (Trad-SH) using Tradescantia pallida var. purpurea for NDEA (0.1; 0.5; 5 and 25mM) genotoxicity and mutagenicity induction. Allium cepa L. was treated with different NDEA concentrations for 3h, for 3 consecutive days, including negative control (distilled water) and positive control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Genotoxicity; Mutagenicity; N-nitrosodiethylaine; Tradescantia pallida var. purpurea. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400015 |
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| LACERDA,LOURRAN P.; MALAQUIAS,GEIZ; PERON,ANA PAULA. |
| In this study we evaluated the action of crude aqueous extracts obtained from rhytidome of Hymenaea stigonocarpa (jatobá-do-cerrado) on Allium cepa meristematic root cells in three concentrations: 0.082, 0.164, 0.328g/mL, at exposure times of 24 and 48 h. The slides were prepared by the crushing technique, and cells analyzed throughout the cell cycle, totaling 5000 for each control group and concentration. It was found that all three concentrations, including the lowest which is considered ideal for use, in all exposure times, had significant antiproliferative action on the cell cycle of this test system. For cells under division, we observed a high number of cells in prophase. Therefore, under the conditions studied H. stigonocarpa indicated to be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Cellular division; Cells in prophase; Medicinal plant. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301147 |
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| Benkeblia,Noureddine. |
| The radical scavenging activity (RAS), chain-breaking activity, H2O2-scavenging, reducing capacity and total phenolics of four types of onions (Green onion, Yellow, Red and Purple) and garlic were investigated. Total phenolics varied from 30 mg (green onion) to 49 mg.100 g-1 fresh weight (garlic). Garlic extract showed the highest RAS, while green onion showed the lowest one. The chain-breaking activity of green onion extract was higher (0.48) than garlic extract (0.029). Chain-breaking activity of yellow, red and purple onion extracts was 0.19, 0.048 and 0.032 respectively. However, heating treatment (90 ºC, 3h) caused an increase in this activity. Low ability of green onion extract to scavenge hydrogen peroxide was noted (35%), whereas high ability was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Radical scavenging activity; Chain-breaking activity; H2O2-scavenging; Reducing capacity; Allium cepa; Allium sativum. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600011 |
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| Peres,Marize Terezinha; Cândido,Ana Carina S.; Faccenda,Odival; Gianini,Aline Siqueira; Honda,Neli Kika. |
| ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. The compounds exhibited low phytotoxicity on L. sativa germination. Perlatolic acid (1) proved the most active compound (20%). Activity was lowest for n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (11) (3.5%). The esters iso-propyl and sec-butyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6 and 8, respectively) inhibited root (35% e 43%, respectively) and hypocotyl growth (59% e 56%, respectively). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Perlatolic acid; 2-hydroxy-4-methoxy-6-n-pentylbenzoates; Lactuca sativa; Allium cepa; Allelopathy.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100205 |
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| Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika. |
| Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027 |
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| Silva,Mayara Christine; Matos,Aline Ferreira; Santos,Hataânderson Luíz Cabral dos; Gomes,Jennifer Vieira; Pastura,Danilo Giovanni Narciso; Pereira,Gabriela Lopes; Rocha,Ellen Borges da; Larangeira,Mayara de Jesus Costa; Alves,Raphael Santiago; Bastos,Leonardo de Oliveira; Borba,Helcio Resende; Lima,Viviane Moreira de. |
| Laurus nobilis L. is a large shrub belonging to the Lauracea family. Its leaves are widely used for food seasoning as well as in folk medicine. Various studies have demonstrated the antiproliferative, antifungal and antibacterial effects of Laurus nobilis, but no studies have investigated the genotoxic effect of the aqueous extract of the plant. The objective of this study was to analyze the genotoxic potential of an aqueous extract of leaves, using the Allium cepa assay and mouse peripheral blood cell micronucleus test. The results showed that the extract did not have any genotoxic activity, but cytotoxic activity was observed in the two experimental models used. The extract had an antiproliferative effect, detected through the reduction of the mitotic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Laurus nobilis; Allium cepa; Micronucleus; Genotoxicity; Cytotoxicity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100534 |
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| Merino,Francis José Zortéa; Ribas,Daniele Felipe; Silva,Cristiane Bezerra da; Duarte,Ana Flávia Schvabe; Paula,Cristiane da Silva; Oliveira,Maislian de; Dias,Josiane de Fátima Gaspari; Miguel,Marilis Dallarmi; Miguel,Obdulio Gomes. |
| The objective of this study was to evaluate the effects of the ethanolic crude extracts and fractions of the species Senecio westermanii Dusén on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. We assessed the germination, growth, root respiration and photosynthesis of the target species in Petri dishes (9.0 cm diameter) containing filter paper n°6. The study was conducted using 50 seeds per plate and held in 4 replicates per concentration of each sample. In the germination there was an inhibitory effect of fractions hexane (FH) and chloroform (FCl) at concentrations of 500 and 1000 µg/mL. There was a reduction in the radicle growth of lettuce by 14 to 24% and a reduction of hypocotilum by 14 to 28%. As for the radicle of the onion was up 74%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Senecio westermanii/extract/effects; Lactuca sativa; Allium cepa; Allelochemicals; Allelopathy.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000300606 |
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| Barbieri,Rosa Lía; Leite,Daniela Lopes; Choer,Eva; Sinigaglia,Cledimara. |
| Bulbos de 16 acessos do Banco Ativo de Germoplasma de Cebola (Allium cepa) da Embrapa Clima Temperado foram avaliados quanto a peso, diâmetro, altura, coloração das túnicas externas, formato, uniformidade e conservação pós-colheita nas condições ambientais de Pelotas - RS, com o objetivo de estimar a divergência genética entre populações de cebola. Os dados obtidos foram submetidos a análises de agrupamento e de componentes principais. Foi evidenciada a presença de variabilidade genética para os caracteres considerados. Os acessos foram divididos em três grupos: o primeiro reuniu 13 acessos incluindo todas as variedades locais e as variedades comerciais com bulbos de coloração marrom; o segundo formado por uma variedade local de bulbos roxos; e o terceiro... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos genéticos; Melhoramento genético; Análise de agrupamento; Análise dos componentes principais; Allium cepa. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000200009 |
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| Registros recuperados: 147 | |
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