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Effect of pH on Cr(III) accumulation, biomass production and phenolic profile in two Salvinia species

Colaborador(es): Chocobar Ponce, Silvana. Instituto de Bioprospección y Fisiología Vegetal. San Miguel de Tucumán, Argentina. CONICET - Universidad Nacional de Tucumán (UNT). San Miguel de Tucumán, Argentina Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Cátedra de Fisiología Vegetal. San Miguel de Tucumán, Argentina | Prado, Carolina. Instituto de Bioprospección y Fisiología Vegetal. San Miguel de Tucumán, Argentina. CONICET - Universidad Nacional de Tucumán (UNT). San Miguel de Tucumán, Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Cátedra de Fisiología Vegetal. San Miguel de Tucumán, Argentina | Pagano, Eduardo Antonio. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina | Prado, Fernando E. Instituto de Bioprospección y Fisiología Vegetal. San Miguel de Tucumán, Argentina. CONICET - Universidad Nacional de Tucumán (UNT). San Miguel de Tucumán, Argentina Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Cátedra de Fisiología Vegetal. San Miguel de Tucumán, Argentina | Rosa, Mariana. Instituto de Bioprospección y Fisiología Vegetal. San Miguel de Tucumán, Argentina. CONICET - Universidad Nacional de Tucumán (UNT). San Miguel de Tucumán, Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Cátedra de Fisiología Vegetal. San Miguel de Tucumán, Argentina.
ISSN: 1552-8618.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): PH | BIOMASS PRODUCTION | CR(III) ACCUMULATION | SALVINIA SPECIES | PHENOLIC COMPOUNDS | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: Environmental Toxicology and Chemistry vol.38, no.1 (2019), p.167–176, grafs., tbls.Resumen: We analyzed the effect of pH on Cr(III) accumulation, biomass production, and phenolic profile of Salvinia rotundifolia and Salvinia minima plants grown in the presence of increasing concentrations of CrCl3. Biomass accumulation, metal tolerance index, and photosynthetic pigment contents indicate that Salvinia rotundifolia seems to be more tolerant of Cr(III) than S. minima at different pHs. Increased metal accumulation by Salvinia species under increasing pH could be explained by changes of the protonation status of cell wall functional groups because both the highest and the lowest pH values used in the present study were outside of the levels at which Cr(III) species start to precipitate. The metal translocation factor indicates that in buffered conditions S. rotundifolia tend to retain more Cr(III) in lacinias than S. minima, probably through the involvement of insoluble phenolics. The results of the present study could be useful to the management of solution pH to maximize the removal of Cr(III) by aquatic plants.
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We analyzed the effect of pH on Cr(III) accumulation, biomass production, and phenolic profile of Salvinia rotundifolia and Salvinia minima plants grown in the presence of increasing concentrations of CrCl3.
Biomass accumulation, metal tolerance index, and photosynthetic pigment contents indicate that Salvinia rotundifolia seems to be more tolerant of Cr(III) than S. minima at different pHs.
Increased metal accumulation by Salvinia species under increasing pH could be explained by changes of the protonation status of cell wall functional groups because both the highest and the lowest pH values used in the present study were outside of the levels at which Cr(III) species start to precipitate.
The metal translocation factor indicates that in buffered conditions S. rotundifolia tend to retain more Cr(III) in lacinias than S. minima, probably through the involvement of insoluble phenolics.
The results of the present study could be useful to the management of solution pH to maximize the removal of Cr(III) by aquatic plants.

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