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| Borella,Junior; Becker,Rafael; Lima,Milene Conceição; Oliveira,Denise dos Santos Colares de; Braga,Eugenia Jacira Bolacel; Oliveira,Ana Claudia Barneche de; Amarante,Luciano do. |
| ABSTRACT: In this work, we compared nitrate-supplied plants (non-nodulated) with non-nitrate-supplied plants (nodulated) under oxygen privation of root system (hypoxia) and re-oxygenation (post-hypoxia; recovery) in order to verify whether N sources affect the antioxidant system during oxidative stress caused by hypoxia and post-hypoxia conditions. Antioxidant enzymatic activities, ascorbate redox state, and reactive oxygen species (ROS) levels were analyzed in roots and leaves of two soybean genotypes, Fundacep 53 RR and BRS Macota at reproductive stage R2, during hypoxia and post-hypoxia in an experiment carried out in a hydroponic system. The antioxidant system was strongly induced in roots of nitrate-supplied plants of both genotypes, with high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Waterlogging; Oxidative stress; Antioxidative enzymes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100051 |
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| Rodrigues-Brandão,Isabel; Kleinowski,Alítcia Moraes; Einhardt,Andersom Millech; Lima,Milene Conceição; Amarante,Luciano do; Peters,José Antonio; Braga,Eugenia Jacira Bolacel. |
| This research investigates effects of salicylic acid (an abiotic elicitor) on the antioxidant activity and betacyan production from leaves of Alternanthera tenella cultured in vitro was evaluated. Plants were grown in a liquid MS medium and vermiculite substrate. After 35 days salicylic acid was added to the medium. Content of betacyanins, total phenols and flavonoids and non-enzymatic antioxidant capacity were determined in leaves of A. tenella after 0, 12, 36 and 48h of treatment. After 36h, concentration of betacyanins and total phenols increased. On the other hand, the increase of the treatment time caused a slight decrease in total flavonoids and reduced the DPPH free radical activity. As result the antioxidant activity of the leaves of A. tenella is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternanthera tenella; DPPH; Total flavonoids; Phenolic compounds; Betacyanins.. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001893 |
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| Lima,Milene Conceição; Amarante,Luciano do; Mariot,Márcio Paim; Serpa,Rosana. |
| A espécie Achillea millefolium L., conhecida como mil-folhas, é uma planta herbácea, rizomatosa e perene. Sua importância medicinal deve-se às suas atividades antibacterianas, antiinflamatórias, antitumorais, analgésicas e antioxidantes. O efeito da disponibilidade de luz e do nitrogênio sobre o crescimento e produção dessa espécie é pouco conhecido. O objetivo deste trabalho foi avaliar a resposta de A. millefolium L., cultivada sob diferentes níveis de sombreamento e doses de nitrogênio, quanto ao crescimento e à produção de pigmentos fotossintéticos. As plantas foram cultivadas sob três doses de nitrogênio (0, 75 e 150kg uréia ha-1) e submetidas a dois níveis de sombreamento 0% (luz plena) e 75% (sombrite 75%). Adotou-se o delineamento experimental de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mil-folhas; Disponibilidade de luz; Adubação. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000100008 |
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