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Detoxification of Cr[VI] in Salvinia minima is related to seasonal-induced changes of thiols, phenolics and antioxidative enzymes

Por: Prado, C.
Colaborador(es): Pagano, E. A | Prado, F. E | Rosa, M.
ISSN: 0304-3894.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): CHROMIUM | OXIDATIVE STRESS | PHENOLICS | SALVINIA MINIMA | THIOLS | ACTIVITY PATTERNS | ANTI-OXIDATIVE ENZYMES | BIOCHEMICAL RESPONSE | FIELD CONDITIONS | GUAIACOL PEROXIDASE | MALONDIALDEHYDE | MEASURED PARAMETERS | PLANTS GROWING | SOLUBLE PHENOLICS | SUPEROXIDE DISMUTASES | UNDERLYING MECHANISM | WINTER SEASONS | ALDEHYDES | AMINO ACIDS | CHROMIUM COMPOUNDS | DETOXIFICATION | ENZYMES | OXYGEN | PLANTS [BOTANY] | PROTEINS | PHENOLS | ANTIOXIDANT | CATALASE | GUAIACOL PEROXIDASE | MALONALDEHYDE | PHENOL DERIVATIVE | PROLINE | SUPEROXIDE DISMUTASE | THIOL | ALCOHOL | CONCENTRATION [COMPOSITION] | ENVIRONMENTAL STRESS | ENZYME ACTIVITY | FERN | OXIDATION | PHENOLIC COMPOUND | PROTEIN | SEASONAL VARIATION | SUBMERGED VEGETATION | TOXICITY | BIOCHEMISTRY | DETOXIFICATION | NONHUMAN | OXIDATIVE STRESS | PLANT | PLANT LEAF | SALVINIA MINIMA | SUMMER | WINTER | CATALASE | FERNS | OXIDATIVE STRESS | PLANT LEAVES | PLANT PROTEINS | PROLINE | SEASONS | SULFHYDRYL COMPOUNDS | SUPEROXIDE DISMUTASE | WATER POLLUTANTS, CHEMICAL | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR. En: Journal of Hazardous Materials Vol. 239-240 (2012) 355-361Resumen: In this study, protein- and non-protein-thiol-containing compounds [THCC], soluble phenolics [SP], proline [Pro], proteins and malondialdehyde [MDA] contents, and antioxidative enzyme activities were analyzed in floating and submerged leaves of Salvinia minima to establish their role against Cr-induced oxidative stress. We analyzed relationships among biochemical responses to different Cr[VI] concentrations to explore underlying mechanisms of Cr detoxification in plants growing under field conditions during summer and winter seasons. Significant increases in THCC were observed in submerged leaves from both seasons, while in floating leaves THCC increased only in summer being decreased in winter. Contrarily SP increased in floating leaves and decreased in submerged ones. MDA increased significantly in winter-leaves, but in summer-leaves remained unchanged. Antioxidative enzymes, i.e. guaiacol peroxidase [G-POD], superoxide dismutase [SOD] and catalase [CAT] showed different activity patterns. G-POD significantly increased in Cr-treated leaves from both seasons, while SOD increased in submerged leaves only, remaining practically unchanged in floating ones. CAT activity increased in floating leaves from both seasons, whereas in submerged ones was decreased or increased. Proteins increased in both leaf types during summer whereas decreased or remained unchanged in winter. Pro increased in winter-submerged leaves only. Results show that seasonal-induced changes occur in all measured parameters.
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In this study, protein- and non-protein-thiol-containing compounds [THCC], soluble phenolics [SP], proline [Pro], proteins and malondialdehyde [MDA] contents, and antioxidative enzyme activities were analyzed in floating and submerged leaves of Salvinia minima to establish their role against Cr-induced oxidative stress. We analyzed relationships among biochemical responses to different Cr[VI] concentrations to explore underlying mechanisms of Cr detoxification in plants growing under field conditions during summer and winter seasons. Significant increases in THCC were observed in submerged leaves from both seasons, while in floating leaves THCC increased only in summer being decreased in winter. Contrarily SP increased in floating leaves and decreased in submerged ones. MDA increased significantly in winter-leaves, but in summer-leaves remained unchanged. Antioxidative enzymes, i.e. guaiacol peroxidase [G-POD], superoxide dismutase [SOD] and catalase [CAT] showed different activity patterns. G-POD significantly increased in Cr-treated leaves from both seasons, while SOD increased in submerged leaves only, remaining practically unchanged in floating ones. CAT activity increased in floating leaves from both seasons, whereas in submerged ones was decreased or increased. Proteins increased in both leaf types during summer whereas decreased or remained unchanged in winter. Pro increased in winter-submerged leaves only. Results show that seasonal-induced changes occur in all measured parameters.

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