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| Registros recuperados: 42 | |
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| Zaccaro,María Cristina; Kato,Adriana; Zulpa,Gloria; Storni,Mónica Magdalena; Steyerthal,Noemí; Lobasso,Karina; Stella,Ana María. |
| Cyanobacteria produces bioactive compounds including plant growth regulators. Naphthalene acetic acid (NAA), a toxic substance, is a synthetic plant regulator used in micropropagation. The aim of this work was to evaluate morphogenetic and antioxidant effects produced by intra and extracellular substances from Scytonema hofmanni (Cyanobacteria) during the multiplication in vitro of Lilium alexandrae and to compare them to those produced by NAA. Intra and extracellular cyanobacterial products increased a) bulblets production reaching 83% and 78% of NAA effect, respectively; b) the bulblet diameter compared to NAA; and c) the bulblet survival due to the promotion of antioxidant activity measured as catalase, ascorbate peroxidase, and glutathione reductase... |
| Tipo: Journal article |
Palavras-chave: Ascorbate peroxidase; Bioactive substances; Bulb regeneration; Catalase; Cyanobacteria; Glutathione reductase; Lilium alexandrae; Scytonema hofmanni. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300007 |
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| Velini,Edivaldo Domingues; Trindade,Maria Lúcia Bueno; Alves,Elza; Catâneo,Ana Catarina; Marino,Celso Luis; Maia,Ivan de Godoy; Mori,Edson Seizo; Furtado,Edson Luiz; Guerrini,Iraê Amaral; Wilcken,Carlos Frederico. |
| This work was aimed at locating Eucalyptus ESTs corresponding to the PROTOX or PPO enzyme (Protoporphyrinogen IX oxidase, E.C. 1.3.3.4) directly related to resistance to herbicides that promote oxidative stress, changing the functionality of this enzyme. PROTOX, which is the site of action of diphenyl-ether (oxyfluorfen, lactofen, fomesafen), oxadiazole (oxadiazon and oxadiargyl), and aryl triazolinone (sulfentrazone and carfentrazone) herbicides, acts on the synthesis route of porphyrins which is associated with the production of chlorophyll a, catalases, and peroxidases. One cluster and one single read were located, with e-values better than e-70, associated to PROTOX. The alignment results between amino acid sequences indicated that this enzyme is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Protoporphyrinogen IX oxidase; Catalase; Peroxidase; Herbicide. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400009 |
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| Hu,Lifang; Yang,Yingui; Jiang,Lunwei; Liu,Shiqiang. |
| Abstract Catalase (CAT) is a common antioxidant enzyme in almost all living organisms. Currently, detailed reports on cucumber (Cucumis sativus L.) CAT (CsCAT) genes and tissue expression profiling are limited. In the present study, four candidate CsCAT genes were identified in cucumber. Phylogenetic analysis indicated that CsCAT1-CsCAT3 are closely related to Arabidopsis AtCAT1-AtCAT3, but no obvious counterpart was observed for CsCAT4. Intron/exon structure analysis revealed that only one of the 15 positions was completely conserved. Motif analysis showed that, unlike the CAT genes of other species, none of CsCAT genes contained all 10 motifs. Expression data showed that transcripts of all of the CsCAT genes, except CsCAT4, were detected in five tissues.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus L.; Catalase; Phylogenetic analysis; Gene family; Motif. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300408 |
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| Teixeira,Felipe Karam; Menezes-Benavente,Larissa; Galvão,Vinícius Costa; Margis-Pinheiro,Márcia. |
| Antioxidant metabolism protects cells from oxidative damage caused by reactive oxygen species (ROS). In plants, several enzymes act jointly to maintain redox homeostasis. Moreover, isoform diversity contributes to the fine tuning necessary for plant responses to both exogenous and endogenous signals influencing antioxidant metabolism. This study aimed to provide a comprehensive view of the major classes of antioxidant enzymes in the woody species Eucalyptus grandis. A careful survey of the FORESTs data bank revealed 36 clusters as encoding antioxidant enzymes: six clusters encoding ascorbate peroxidase (APx) isozymes, three catalase (CAT) proteins, three dehydroascorbate reductase (DHAR), two glutathione reductase (GR) isozymes, four monodehydroascorbate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Antioxidant metabolism; Catalase; Ascorbate-gluthatione cycle. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400007 |
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| Dellali, M; Romeo, M; Aissa, P. |
| The variations of catalase activity, which is a biochemical biomarker of exposure to an oxidative stress, were followed month by month (from May 1998 to May 1999) in Mediterranean clams (Ruditapes decussatus) collected at three stations (J, A and F), and mussels (Mytilus galloprovincialis) collected at two stations (J and C) in Lake Bizerte (Tunisia). Several oceanographic parameters were measured together with catalase activity in the animals to evaluate the quality of waters in the lake. Whatever the station taken into consideration, catalase activity in clams significantly varied as a function of the season, with marked increases in September, when the quality of waters was poor. Clams originating from station A presented the highest mean activity... |
| Tipo: Text |
Palavras-chave: Biomarqueur; Catalase; Lagune de Bizerte; Moule; Palourde; Biomarker; Catalase; Lake Bizerte; Mussel; Clam. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43354/42859.pdf |
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| Garcia,Luciano de O.; Okamoto,Marcelo H.; Riffel,Ana Paula K.; Saccol,Etiane M.; Pavanato,Maria A.; Sampaio,Luís André N.. |
| The aim of this study was to determine oxidative stress parameters in the liver and gill of Brazilian flounder juveniles (307.0 ± 16.0 g and 30.0 ± 4.0 cm) submitted to different water temperature (17.1, 23.0 and 28.8ºC) for 72 h and maintained at salinity 25‰. After the acclimation of 7 days, in 23ºC, fish were transferred to 200 L tanks containing seawater (salinity 25‰) at 28.8ºC (heat shock), 17.1ºC (cold shock) or 23.0ºC (control), five replicates (five fish tank-1). The sampled collection occurred in 0 (pre-challenge), 3, 24, 48 and 72 h after temperature shock. Flounder exposed to 17.1ºC and 28.8ºC showed significantly higher TBARS levels and GST activity in the liver post-exposition (PE) in relation to the control (23ºC). CAT activity in liver... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catalase; GST; Lipid peroxidation; TBARS; Thermal shocks. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300607 |
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| 大和田, 琢二; 三浦, 賢紀; 南, 里栄; 白川, 雪香; 井川, 香子; 佐藤, 哲也; OHWADA, Takuji; MIURA, Takanori; MINAMI, Rie; SHIRAKAWA, Yukika; IGAWA, Keiko; SATO, Tetsuya. |
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Palavras-chave: 根粒菌; 過酸化水素（H2O2）; カタラーゼ; ペルオキシダーゼ; Rhizobium; Hydrogen peroxide(H2O2); Catalase; Peroxidase. |
| Ano: 1998 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1286 |
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| Pereira,Fabricio José; Magalhães,Paulo César; Souza,Thiago Corrêa de; Castro,Evaristo Mauro de; Alves,José Donizeti. |
| Este trabalho teve como objetivo avaliar a influência de sucessivos ciclos de seleção do milho 'Saracura' na atividade das enzimas do sistema antioxidante, e a relação dessas enzimas com a capacidade dessa variedade em desenvolver aerênquima. Sementes de 18 ciclos de seleção intercalados do milho 'Saracura' e da cultivar BR 107, sensível à hipoxia, foram semeadas em vasos e em casa de vegetação. As plantas foram submetidas ao alagamento intermitente de dois em dois dias. As amostras de raízes foram coletadas após 60 dias e analisaram-se as atividades das enzimas peroxidase do guaiacol, peroxidase do ascorbato e catalase, além da capacidade das plantas de cada ciclo desenvolverem aerênquima. Ao longo dos ciclos, as plantas apresentaram modificações na... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Catalase; Peroxidases; Seleção massal; Tolerância ao alagamento. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000500003 |
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| Marques,Douglas José; Broetto,Fernando; Ferreira,Mozart Martins; Lobato,Allan Klynger da Silva; Ávila,Fabricio William de; Pereira,Fabricio José. |
| Potassium participates in the essential processes in plant physiology, however, the effects of K sources on plant metabolism have been little studied. Also, in certain cases, K sources and concentrations may cause undesirable effects, e.g., soil salinization. The objective was to evaluate the effect of K sources and levels on the enzyme activity of the antioxidant system and protein content in eggplant (Solanum melongena L.) leaves and to determine the most suitable K sources for these physiological characteristics. The experiment was conducted in randomized blocks, in a 2 × 4 factorial design, consisting of two K sources (KCl and K2SO4) and rates (250, 500, 750, and 1000 kg ha-1 K2O), with four replications. The following variables were evaluated: plant... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Solanum melongena L.; Potassium; Superoxide dismutase; Catalase; Protein. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600018 |
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| Rosa,Sttela Dellyzete Veiga Franco da; Von Pinho,Édila Vilela Resende; Vieira,Elisa Serra Negra; Veiga,Ruben Delly; Veiga,Adriano Delly. |
| Sementes de milho tornam-se tolerantes à dessecação à medida que secam naturalmente no campo e, após a maturidade fisiológica, pré-secagem a 35ºC pode induzir tolerância à temperatura de secagem de 50ºC. Nesse trabalho, sementes da cultivar BRS-3060, colhidas com teor de água de 42,2%, submetidas a períodos crescentes de pré-condicionamento apresentaram tolerância crescenteà temperatura de 50ºC, até atingirem o teor de água de 25,9%, quando exibiram o máximo desempenho fisiológico, avaliado por meio de testes de germinação, vigor e atividade de enzimas a-amilase. O presente trabalho teve o objetivo de investigar o padrão eletroforético de enzimas removedoras de radicais livres e de proteínas lea, em sementes tolerantes e intolerantes a alta temperatura de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Tolerância à dessecação; Peroxidase; Superoxidase; Catalase. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222005000200014 |
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| Vasconcelos,Ana Carolina Feitosa de; Zhang,Xunzhong; Ervin,Erik H.; Kiehl,Jorge de Castro. |
| Water stress is one of the most important environmental factors inducing physiological changes in plants, such as decrease in the water potential of the cells, the stomatal closure; and the development of oxidative processes mediated by reactive oxygen species (ROS). Antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) are efficient scavengers of ROS. The aim of this research was to examine how the application of biostimulant based on humic substances and aminoacids may affect activity levels of SOD, CAT, and APX of maize and soybean plants under well-watered or drought stress conditions. Pots (4.5 L) were filled with a Typic Hapludult soil where the biostimulants doses were applied. It was taken leaf samples in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Superoxide dismutase; Catalase; Ascorbate peroxidase; Water status. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300015 |
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| ALVES,CARLA; COSTA,EDUARDA; SOFIATTI,JESSICA R.; FORTE,CESAR T.; WINTER,FÁBIO L.; HOLZ,CINTHIA M.; KAIZER,ROSILENE R.; GALON,LEANDRO. |
| ABSTRACT Most herbicides applied in crop field, stay in the soil for a period, affecting next crop or even the plants using as green manure. Nowadays, the use of herbicides grow to increase productivity, mainly in the grain producing region north of Rio Grande do Sul state. The objective of this study was to evaluate the effects of herbicides fomesafen and sulfentrazone on antioxidant system in Avena sativa1, Vicia sativa2, Raphanus sativus and Lupinus albus. The plants were exposed to varying concentrations of fomesafen3 (0, 0.125, 0.25 and 0.5 kg ha -1) and sulfentrazone (0, 0.3, 0.6 and 1.2 kg ha-1). For this, the activities of, ascorbat peroxidase, catalase and guaiacol enzymes were analyzed, and the levels of MDA were quantificated. Fomesafen and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catalase; Enzymes; Agricultural plants; PROTOX system. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401533 |
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| Registros recuperados: 42 | |
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