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| Calgaroto,Nicéia Spanholi; Nicoloso,Fernando Teixeira; Pereira,Luciane Belmonte; Cargnelutti,Denise; Antes,Fabiane Goldschmidt; Dressler,Valderi Luiz. |
| ABSTRACT: The mineral nutritional homeostasis in response to different concentrations of Hg (0, 25 and 50μM) was evaluated in Pfaffia glomerata plant. The exposure to the highest level of Hg (50µM) caused a decreasing in shoot and root fresh weights of 15.5% and 20%, respectively. Both shoot and root Hg concentrations increased linearly with increasing external Hg concentrations. Ca concentration decreased in shoot only at 50µM Hg, whereas shoot K and Mg concentrations decreased at both 25 and 50µM Hg, when compared to the control. A significant decrease in Cu, Zn, Fe and Mn concentrations in plants exposed to Hg was observed, but most Zn, Mn, and Cu in the roots. On the other hand, P concentration increased in both root and shoot of plants exposed at 25... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Ginseng; Nutritional homeostasis; Macronutrients; Micronutrients; Hg toxicity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000200279 |
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| Tabaldi,Luciane Almeri; Ruppenthal,Raquel; Pereira,Luciane Belmonte; Cargnelutti,Denise; Gonçalves,Jamile Fabbrin; Morsch,Vera Maria; Schetinger,Maria Rosa Chitolina. |
| Acid phosphatases (3.1.3.2) are a group of enzymes widely distributed in nature, which catalyze the hydrolysis of a variety of phosphate esters in the pH range of 4-6. We confirmed the presence of acid phosphatases in seedlings of cucumber (Cucumis sativus), radish (Raphanus sativus) and rocket salad (Eruca vesicaria) under different assay conditions using a rapid and simple preparation. The results showed that the optimum pH and temperature used for all species were close to 5.5 and 35°C, respectively. The enzyme was inhibited by molybdate, fluoride, azide, levamisole, orthovanadate, Zn2+ and Cu2+. Suramin had no effect on enzyme activity. The acid phosphatase from cucumber, radish and rocket salad hydrolyzed a wide variety of phosphate esters and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Raphanus sativus; Eruca vesicaria; Phosphatases. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000300009 |
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| Scapinelli,Alex; Deina,Filipe Rafaeli; Valadão Junior,Daniel Dias; Valadão,Franciele Caroline Assis; Pereira,Luciane Belmonte. |
| RESUMO Objetivou-se neste trabalho verificar alterações morfológicas e anatômicas no sistema radicular do girassol, bem como nos seus atributos produtivos em função da compactação adicional provocada pelo tráfego de trator em um Latossolo Vermelho distrófico típico. A pesquisa foi realizada a campo, sendo os tratamentos referentes a 5 níveis de compactação: sem tráfego adicional (C0); 1 (C1); 3 (C3); 6 (C6) e 11 (C11) passadas de trator. Foram avaliadas as propriedades físicas do solo e a distribuição das raízes nas camadas de 0 – 0,05; 0,05 – 0,10; 0,10 – 0,15 e 0,15 – 0,20 m de profundidade, além das características vegetativas e reprodutivas e as alterações anatômicas das raízes. A compactação do solo pelo tráfego de máquinas promove diminuição do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annuus; Alterações anatômicas; Índice de área radicular. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400474 |
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