Tolypothrix tenuis stress response to nickel

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...

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Detalles Bibliográficos
Autores principales:	Zaccaro, María Cristina, Stella de Rosellini, Ana María Cristina, Zulpa, Gloria
Publicado:	2007
Materias:	Bioremediation Catalase activity Cyanobacteria Nickel Stress Toxicity Biofilters Biomass Concentration (process) Tolypothrix tenuis stress Algae Calothrix sp. PCC 7101
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09593993_v23_n6_p833_Storni http://hdl.handle.net/20.500.12110/paper_09593993_v23_n6_p833_Storni
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09593993_v23_n6_p833_Storni
record_format	dspace
spelling	paper:paper_09593993_v23_n6_p833_Storni2023-06-08T15:56:52Z Tolypothrix tenuis stress response to nickel Zaccaro, María Cristina Stella de Rosellini, Ana María Cristina Zulpa, Gloria 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 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. Fil:Zaccaro, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Stella, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zulpa, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09593993_v23_n6_p833_Storni http://hdl.handle.net/20.500.12110/paper_09593993_v23_n6_p833_Storni
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	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
spellingShingle	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 Zaccaro, María Cristina Stella de Rosellini, Ana María Cristina Zulpa, Gloria Tolypothrix tenuis stress response to nickel
topic_facet	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
description	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.
author	Zaccaro, María Cristina Stella de Rosellini, Ana María Cristina Zulpa, Gloria
author_facet	Zaccaro, María Cristina Stella de Rosellini, Ana María Cristina Zulpa, Gloria
author_sort	Zaccaro, María Cristina
title	Tolypothrix tenuis stress response to nickel
title_short	Tolypothrix tenuis stress response to nickel
title_full	Tolypothrix tenuis stress response to nickel
title_fullStr	Tolypothrix tenuis stress response to nickel
title_full_unstemmed	Tolypothrix tenuis stress response to nickel
title_sort	tolypothrix tenuis stress response to nickel
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09593993_v23_n6_p833_Storni http://hdl.handle.net/20.500.12110/paper_09593993_v23_n6_p833_Storni
work_keys_str_mv	AT zaccaromariacristina tolypothrixtenuisstressresponsetonickel AT stelladerosellinianamariacristina tolypothrixtenuisstressresponsetonickel AT zulpagloria tolypothrixtenuisstressresponsetonickel
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Tolypothrix tenuis stress response to nickel

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