Artículo
Abstract:
Metal ions are both essential and potentially toxic. The aim of this work was to demonstrate that diazotrophic cyanobacterium Tolypothrix tenuis N°54 can tolerate toxic concentrations of Ni2+ in order to use the biomass in biofilters or as biofertilizer. For this purpose, growth, pigment and protein contents and catalase activity of T. tenuis growing in increasing concentrations of Ni2+ ranging from 10-10 to 10 -4 M were assesed. The strain did not grow at Ni2+ concentration of 10-4 M, but at lower concentrations there were no significant differences with the control; it was tolerant at 10-10 and 10-8 M. Nickel concentration of 10-6 M is toxic for this cyanobacterial strain, because dry weight decreased by 30%; allophycocyanin and phycoerythrin decreased by 92% and 98%, respectively and protein content increased by 42%. Chlorophyll a concentration was more than double the control value in 10-10 and 10-8M, but in 10-6M it decreased by 19%. Catalase (E.C. 1.11.1.6) activity doubled the control value in the lowest nickel concentration whereas in 10-8M there was no significant difference with the control and in 10-6, it decreased by 78%. The living biomass of this strain could be used as a step in the bioremediation process in waters contaminated with concentrations of nickel lower than 10-6 M and eventually as a biofertilizer. © 2007 Springer Science+Business Media B.V.
Registro:
| Documento: | Artículo |
| Título: | Tolypothrix tenuis stress response to nickel |
| Autor: | Storni, M.M.; Zaccaro, M.C.; Capano, A.; Stella, A.M.; Zulpa, G. |
| Filiación: | Laboratorio de Biología de Cyanobacteria Y Laboratorio de Ecoporfirinas, Facultad de Ciencias Exactas Y Naturales, Conicet, Intendente Güiraldes 2620, C1428EHA, Ciudad de Buenos Aires, Argentina |
| Palabras clave: | Bioremediation; Catalase activity; Cyanobacteria; Nickel; Stress; Toxicity; Biofilters; Biomass; Bioremediation; Concentration (process); Nickel; Toxicity; Catalase activity; Cyanobacteria; Tolypothrix tenuis stress; Algae; Calothrix sp. PCC 7101; Cyanobacteria |
| Año: | 2007 |
| Volumen: | 23 |
| Número: | 6 |
| Página de inicio: | 833 |
| Página de fin: | 836 |
| DOI: | http://dx.doi.org/10.1007/s11274-006-9306-2 |
| Título revista: | World Journal of Microbiology and Biotechnology |
| Título revista abreviado: | World J. Microbiol. Biotechnol. |
| ISSN: | 09593993 |
| CODEN: | WJMBE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09593993_v23_n6_p833_Storni |
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Citas:
---------- APA ----------
Storni, M.M., Zaccaro, M.C., Capano, A., Stella, A.M. & Zulpa, G. (2007) . Tolypothrix tenuis stress response to nickel. World Journal of Microbiology and Biotechnology, 23(6), 833-836.http://dx.doi.org/10.1007/s11274-006-9306-2
---------- CHICAGO ----------
Storni, M.M., Zaccaro, M.C., Capano, A., Stella, A.M., Zulpa, G. "Tolypothrix tenuis stress response to nickel" . World Journal of Microbiology and Biotechnology 23, no. 6 (2007) : 833-836.http://dx.doi.org/10.1007/s11274-006-9306-2
---------- MLA ----------
Storni, M.M., Zaccaro, M.C., Capano, A., Stella, A.M., Zulpa, G. "Tolypothrix tenuis stress response to nickel" . World Journal of Microbiology and Biotechnology, vol. 23, no. 6, 2007, pp. 833-836.http://dx.doi.org/10.1007/s11274-006-9306-2
---------- VANCOUVER ----------
Storni, M.M., Zaccaro, M.C., Capano, A., Stella, A.M., Zulpa, G. Tolypothrix tenuis stress response to nickel. World J. Microbiol. Biotechnol. 2007;23(6):833-836.http://dx.doi.org/10.1007/s11274-006-9306-2
