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| Registros recuperados: 78 | |
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| Almeida,M.De; Rochelle,L.A.; Crocomo,O.J.. |
| Utilizando dados obtidos sobre a atividade de isoenzinias de esterase e peroxidase, o teor de proteína total solúvel e o nível de sólidos solúveis (sacarose, grau Brix, bem como parâmetros organográficos de colmo e folhas já publicados), foi possível elaborar uma chave analítica para determinação de 10 variedades de cana-de-açúcar (Saccharum spp.): NA 56-79, IAC 52-150, IAC 64-257, SP 70-1143, SP 71-3146, SP 71-3149. SP 71-1406. SP 71-6163, SP 71-6168 e SP 71-799. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quimiotaxonomia; Cana-de-açúcar; Organografia; Colmo; Folha; Isoenzimas; Esterase; Peroxidase. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100004 |
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| Almeida,M. de; Crócomo,O. J.. |
| No presente trabalho foram determinados o perfil isoenzimático diferencial de esterase e peroxidase, a proteína total solúvel e os sólidos solúveis (sacarose) em graus brix, de 10 cultivares de cana-de-açúcar (Saccharum spp.) atualmente cultivados no Brasil. Os cultivares estudados foram: NA 56-79, IAC 52-150, IAC 64-257, SP 70-1143, SP 71-3146, SP 71-3149, SP 71-1406, SP 71-6163, SP 71-61-68 e SP 71-799. Com os dados obtidos foi possível comprovar o valor taxonômico das características bioquímicas que representam uma inovação em taxonomia de cana-de-açúcar no Brasil. As isoenzimas de esterase apresentaram um padrão eletroforético específico para cada cultivar estudado, enquanto que as isoenzimas de peroxidase só permitiram agrupar os cultivares por... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quimiotaxonomia; Cana-de-açúcar; Isoenzimas; Esterase; Peroxidase. |
| Ano: 1994 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000300007 |
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| RONCATTO,M.C.; PASCHOLATI,S.F.. |
| O trabalho foi desenvolvido com o objetivo de se verificar a influência de Saccharomyces cerevisiae na forma de produto comercial, fermento biológico fresco para panificação, na atividade e no padrão eletroforético da peroxidase em folhas de milho e sorgo. As preparações de Saccharomyces utilizadas foram representadas por suspensões de células e seus respectivos filtrados, autoclavados ou não. A análise dos extratos obtidos dessas gramíneas mostrou que suspensões de células e os filtrados dessas suspensões, tratadas termicamente ou não, foram efetivos em ocasionar alterações na atividade e padrão eletroforético da peroxidase em milho e sorgo. Além de se mostrarem termoestáveis, os extratos obtidos de células intactas ou homogeneizadas de S. cerevisiae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharomyces cerevisiae; Peroxidase; Eletroforese; Milho; Sorgo. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000300007 |
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| Souza,Rocheli de; Schons,Jurema; Brammer,Sandra P.; Prestes,Ariano M.; Scheeren,Pedro L.; Nicolini-Teixeira,Fernanda; Cecchetti,Dileta; Lanzarini,Ariane C.. |
| Com o objetivo de conhecer as alterações metabólicas promovidas pelo Soil-borne wheat mosaic virus (SBWMV), um dos vírus economicamente mais importantes da cultura do trigo (Triticum aestivum), foram analisados os níveis de proteínas solúveis e determinadas as atividades da peroxidase e da protease em quatro cultivares (BRS Guabiju, BRS 194, BRS 179, BR 23) e uma linhagem (PF 980524) de trigo com diferentes níveis de resistência ao vírus. Os dados obtidos foram submetidos à análise de variância, comparando-se as médias, pelo Teste de Duncan a 5%. Os níveis de proteínas solúveis foram mais elevados nas plantas sem sintomas, enquanto que as atividades da peroxidase e da protease foram maiores em plantas com sintoma de mosaico do que em plantas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Proteínas solúveis; Peroxidase; Protease; Furovirus. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000400010 |
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| Soares,Rafael M.; Maringoni,Antonio C.; Lima,Giuseppina P.P.. |
| O efeito da indução de resistência promovido por acibenzolar-S-methyl foi avaliado em três cultivares de feijoeiro (Phaseolus vulgaris), com diferentes níveis de resistência à murcha-de-Curtobacterium, em dois ensaios distintos, sob condições de casa de vegetação. O primeiro ensaio visou avaliar a ação do acibenzolar-S-methyl na indução de resistência à murcha-de-Curtobacterium e o segundo, objetivou avaliar a ação deste produto na atividade das enzimas peroxidase e polifenoloxidase e no nível de proteínas totais solúveis, em amostras de folhas e caule, sem inoculação do patógeno. Em ambos os ensaios o indutor foi pulverizado na dosagem de 100 µg i.a./ml, cinco dias após o transplante das plantas para vasos. O acibenzolar-S-methyl foi ineficiente, tanto... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Curtobacterium flaccumfaciens; Indução de resistência; Phaseolus vulgaris; Peroxidase; Polifenoloxidase. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000400002 |
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| Gutiérrez-Martínez,Porfirio; Bautista-Baños,Silvia; Berúmen-Varela,Guillermo; Ramos-Guerrero,Anelsy; Hernández-Ibañez,Alba María. |
| Abstract: Colletotrichum is considered one of the fungal genera with the greatest diversity of species of phytopathogenic fungi and with a wide range of hosts including tropical fruits. In this study, the concentration of chitosan applied was a key factor in the in vitro inhibition of the three Colletotrichum isolates with the most sensitive being the one from banana. Germination was the development stage most affected by the application of this polymer. At the end of 10 days of storage, control of anthracnose in soursop, mango and banana fruit was considerable with the application of 1 % chitosan, with 80 to 100 % inhibition. Likewise, the ripening process of fruit with and without chitosan was generally similar. Activity of the peroxidase (POD) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antracnose; Anonna muricata; Mangifera indica; Musa acuminata; Peroxidase; Polyphenol oxidase. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200282 |
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| Simões, Adriano do Nascimento; Moreira, Silvino Intra; Mosquim, Paulo Roberto; Soares, Nilda de Fátima Ferreira; Puschmann, Rolf. |
| We studied the effects of storage temperature on the activities of phenylalanine ammonia-lyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO) in minimally processed kale (Brassica oleracea var. acephala) that was stored for 15 and 9 days at 5 ± 1ºC and 10 ± 1ºC, respectively. The main visual evidence for quality loss in whole leaves was yellowing and loss of turgescence. Minimally processed leaves presented significant browning, indicating increased POD and PPO activities. The PAL activity in minimally processed leaves stored at 5ºC was fourfold higher than that of whole leaves after two days of storage. We showed that minimal processing influenced PAL, POD and PPO activities. The activity of all enzymes studied increased during storage, indicating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleraceae cv. acephala; Escurecimento enzimático; Peroxidase; Polifenol oxidase; Fenilalanina amônioliase Fisiologia Pós-colheita Ciências Agrárias: 50000004; Fisiologia de Plantas Cultivadas: 50103067 Brassica oleracea cv. acephala; Enzymatic browning; Peroxidase; Polyphenol oxidase; Phenylalanine ammonia-lyase Fisiologia Pós-Colheita. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18123 |
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| Nogueira,J.N.; Silva,E.. |
| O objetivo deste trabalho foi o de comparar o efeito do calor, do SO2 e do ácido ascorbico, visando determinar qual o método mais eficiente para controlar o escurecimento enzímico de cada uma das frutas e hortaliças estudadas. Os resultados mostraram que para a banana, pêssego, maça, cenoura, couve-flor e palmito, o calor foi o melhor agente inativador do sistema enzímico responsável pelo escurecimento. O SO2 foi mais eficiente para a pera, e para o figo e batata, o melhor agente inibidor foi o ácido ascórbico. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inativação de enzimas; Frutas; Hortaliças; Polifenol oxidase; Peroxidase. |
| Ano: 1989 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761989000200011 |
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| HERRIG,VANESSA; FERRARESE,MARIA DE LOURDES L.; SUZUKI,LETÍCIA S.; RODRIGUES,JOÃO DOMINGOS; FERRARESE-FILHO,OSVALDO. |
| The influence of the allelochemicals ferulic (FA) and vanillic (VA) acids on peroxidase (POD, EC 1.11.1.7) and phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) activities and their relationships with phenolic acid (PhAs) contents and root growth of soybean (Glycine max (L.) Merr.) were examined. Three-day-old seedlings were cultivated in nutrient solution containing FA or VA (0.1 to 1 mM) for 48 h. Both compounds (at 0.5 and 1 mM) decreased root length (RL), fresh weight (FW) and dry weight (DW) and increased PhAs contents. At 0.5 and 1 mM, FA increased soluble POD activity (18% and 47%, respectively) and cell wall (CW)-bound POD activity (61% and 34%), while VA increased soluble POD activity (33% and 17%) but did not affect CW-bound POD activity. At 1 mM, FA... |
| Tipo: Journal article |
Palavras-chave: Roots; Phenolic acids; Phenylalanine ammonia-lyase; Peroxidase; Soybean. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000100009 |
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| Pereira,Luiz Filipe; Goodwin,Paul H.; Erickson,Larry. |
| Cassava bacterial blight (CBB), caused by Xanthomonas axonopodis pv. manihotis, is considered one of the most important bacterial diseases of cassava (Manihot esculenta Crantz). In order to characterize the cassava genes involved in resistance to this disease, a genomic clone of a cationic peroxidase gene, MEPX1, was isolated by PCR from cassava cultivar MCOL 22. The DNA sequence of MEPX1 showed high homology with other plant peroxidase genes and contained a large intron typical of peroxidase genes. The predicted translation product showed a heme-ligand motif, also a characteristic of peroxidases, as well as phosphorylation, myristoylation and glycosylation sites. The amino acid sequence had 75 % homology with two Arabidopsis thaliana peroxidases. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Peroxidase; Bacterial blight; Xanthomonas axonopodis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200002 |
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| Vitti,Maria Carolina Dario; Sasaki,Fabiana Fumi; Miguel,Patrícia; Kluge,Ricardo Alfredo; Moretti,Celso Luiz. |
| The purpose of the present study was to evaluate the effect of different potato cultivars and storage temperatures on the specific activity of phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO) and peroxidase (POD) in minimally processed potatoes. Potato cultivars Agata, Asterix and Monalisa were selected, washed, peeled, diced, sanitized, centrifuged, vacuum- packed and stored at 5 and 15°C for 9 and 5 days, respectively. There was an increase in the enzymatic activity in all the cultivars stored at 15°C. The cultivars 'Agata' and 'Asterix' stored at 5ºC did not differ significantly between them for the PAL, PPO and POD activities. The PAL, PPO and POD activities were also influenced by the storage temperature. The cultivars Agata and Asterix... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum L; Phenylalanine ammonia-lyase; Polyphenol oxidase; Peroxidase; Minimal processing. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500016 |
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| Noreña,Caciano Zapata; Rigon,Renata Trindade. |
| ABSTRACT The inactivation of peroxidase and polyphenol oxidase and the degradation of phenolic compounds, anthocyanins, and antioxidant activity in blackberry were investigated during blanching in water at 80-90 °C, and in steam, from 0 to 10 minutes. The enzyme kinetics indicated the presence of two isoenzymes with different thermal stability, following two-phase model, in which the reaction rate constant increased with increasing temperature for both the heat labile and heat resistant component. The phenolic compounds also followed a biphasic pattern, indicating a more heat resistant fraction, and the rate constants increased with increasing temperature. For the antioxidant activity and anthocyanins, the first order kinetic model (R2>0.982) indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Peroxidase; Polyphenol oxidase; Phenolic; Anthocyanins. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100501 |
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| Bido,Graciene de Souza; Ferrarese,Maria de Lourdes Lucio; Marchiosi,Rogério; Ferrarese-Filho,Osvaldo. |
| The flavanone naringenin, an intermediate in flavonoid biosynthesis, was tested for its effect on root growth, phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities, as well as phenolic compounds and lignin contents in soybean (Glycine max L. Merrill) seedlings. Three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0), with or without 0.1 to 0.4 mM naringenin in a growth chamber (25°C, 12-h photoperiod, irradiance of 280 µmol m-2 s-1) for 24 h. Inhibitory effects on root growth (length, weight, cell viability), PAL and soluble POD activities were detected after naringenin treatments. These effects were associated with stimulatory activity of the cell wall-bound POD followed by an increase in the lignin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Lignin; Flavonoid; Peroxidase; Phenylalanine ammonia-lyase; Root growth. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300005 |
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| Mikiashvili,Nona A; Isikhuemhen,Omoanghe S; Ohimain,Elijah I. |
| Fourteen strains of Grifola frondosa (Dicks.) S. F. Gray, originating from different regions (Asia, Europe and North America) were tested for lignin degradation, ligninolytic enzyme activities, protein accumulation and exopolysaccharide production during 55 days of cultivation on oak sawdust. Lignin degradation varied from 2.6 to7.1 % of dry weight of the oak sawdust substrate among tested strains. The loss of dry matter in all screened fungi varied between 11.7 and 33.0%, and the amount of crude protein in the dry substrate varied between 0.94 to 2.55%. The strain, MBFBL 596, had the highest laccase activity (703.3 U/l), and the maximum peroxidase activity of 22.6 U/l was shown by the strain MBFBL 684. Several tested strains (MBFBL 21, 638 and 662)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grifola frondosa; Exopolysaccharide; Laccase; Lignin degradation; Peroxidase. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300031 |
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| Di Piero,Robson M.; Wulff,Nelson A.; Pascholati,Sérgio F.. |
| The shiitake mushroom (Lentinula edodes) has been used in research involving the prevention and the control of human and plant diseases. In cucumber plants, treated with aqueous extracts from mushroom basidiocarps, there was a reduction in anthracnose severity caused by Colletotrichum lagenarium, and an increase in peroxidase activity in the leaves. With the aim of obtaining molecules of agronomic interest, the crude aqueous extract from L. edodes basidiocarp was fractioned with ammonium sulfate. The fraction corresponding to 40-80% of saturation (p40-80), the most effective in reducing anthracnose on cucumber cotyledons, was submitted to anion exchange chromatography (AEC). After AEC, six protein peaks were obtained and the peak V, containing 34% of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shiitake; Anthracnose; Peroxidase. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200015 |
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| Registros recuperados: 78 | |
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