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	Provedor de dados Braz. J. Plant Physiol. (2) BABT (1) Autor Panda,Sanjib Kumar (3) Choudhury,Shuvasish (1) Khan,Mohammad Hussain (1) Upadhyay,RishiKesh (1) Palavra-chave Oxidative stress (2) Antioxidants (1) Biochemical alterations (1) Chromium (1) Chromium stress (1) Copper (1) Growth (1) Heavy metals (1) Lipid peroxidation (1) Malondialdehyde (1) NaCl (1) Nitrate reductase (1) PEG (1) Pistia stratiotes L (1) Polytrichum commune (1) Reactive oxygen species (1) Superoxide dismutase (1) Temperature (1) Zinc (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2010 (1) 2005 (1) 2004 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Changes in growth and superoxide dismutase activity in Hydrilla verticillata L. under abiotic stress Braz. J. Plant Physiol. Panda,Sanjib Kumar; Khan,Mohammad Hussain. A study was made of the role of various heavy metals (chromium, zinc, copper and cadmium) together with the effects of NaCl-salinity, PEG-mediated water stress and temperature on growth and superoxide dismutase (SOD) activity in hydrilla (Hydrilla verticillata L.). Almost all metals studied reduced growth but presented a modulatory effect at lower concentrations. NaCl-salinity, water stress and temperature treatments also reduced growth. SOD activity was inhibited by both chromium and zinc but increased by copper and cadmium. NaCl-salinity increased SOD activity while water stress decreased it. SOD showed thermostability with a higher activity being recorded at 45ºC. Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth; Heavy metals; NaCl; PEG; Superoxide dismutase; Temperature. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000200007 Changes in nitrate reductase activity and oxidative stress response in the moss Polytrichum commune subjected to chromium, copper and zinc phytotoxicity Braz. J. Plant Physiol. Panda,Sanjib Kumar; Choudhury,Shuvasish. The main aim of this paper was to investigate the effect of chromium (Cr), copper (Cu) and zinc (Zn) on nitrate reductase (NR) activity and oxidative stress responses in the moss Polytrichum commune. Cr, Cu and Zn resulted in the inhibition of NR activity. A decline in total chlorophyll content was observed after 24 and 48 h of metal treatment. Accumulation of the metals showed a dose and time dependent increase. High accumulation of Cu, Cr and Zn were seen in moss shoots after 24 and 48 h of treatment. Treatment of Cr, Cu and Zn for 24 or 48 h resulted in the increase of malondialdehyde (MDA) content in moss shoots. The highest increase was observed in shoots under Cu treatment followed by Cr and Zn. The MDA content was significantly higher after 48h.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidants; Chromium; Copper; Malondialdehyde; Nitrate reductase; Oxidative stress; Polytrichum commune; Zinc. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000200001 Influence of chromium salts on increased lipid peroxidation and differential pattern in antioxidant metabolism in Pistia stratiotes L BABT Upadhyay,RishiKesh; Panda,Sanjib Kumar. In this work, the changing effect of different concentrations (0, 0.01, 0.1, 1, 10mM) of hexavalent and trivalent chromium on different biochemical parameters along with antioxidant enzymes was investigated on water lettuce (Pistia stratiotes L.) in order to know the possible involvement of this metal in oxidative injury, besides the activities of antioxidant enzymes leading to biochemical and oxidative aberration induced by elevated concentrations. Both in roots and shoots, Cr produced a significant increase in enzymic and non-enzymic antioxidants, except in catalase (CAT) activity where a strong accumulation of hydrogen peroxide was indicated, suggesting an imposition of oxidative stress. The observation showed an uptake of chromium by P. stratiotes L.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical alterations; Chromium stress; Lipid peroxidation; Oxidative stress; Pistia stratiotes L; Reactive oxygen species. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500018 Registros recuperados: 3 Primeira ... 1 ... Última

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