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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Autores principales: Storni, M.M., Zaccaro, M.C., Capano, A., Stella, A.M., Zulpa, G.
Formato: JOUR
Materias:
Bioremediation
Catalase activity
Cyanobacteria
Nickel
Stress
Toxicity
Biofilters
Biomass
Concentration (process)
Tolypothrix tenuis stress
Algae
Calothrix sp. PCC 7101
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09593993_v23_n6_p833_Storni
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09593993_v23_n6_p833_Storni
record_format dspace
spelling todo:paper_09593993_v23_n6_p833_Storni2023-10-03T15:52:51Z Tolypothrix tenuis stress response to nickel Storni, M.M. Zaccaro, M.C. Capano, A. Stella, A.M. Zulpa, G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Storni, M.M.
Zaccaro, M.C.
Capano, A.
Stella, A.M.
Zulpa, G.
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.
format JOUR
author Storni, M.M.
Zaccaro, M.C.
Capano, A.
Stella, A.M.
Zulpa, G.
author_facet Storni, M.M.
Zaccaro, M.C.
Capano, A.
Stella, A.M.
Zulpa, G.
author_sort Storni, M.M.
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
url http://hdl.handle.net/20.500.12110/paper_09593993_v23_n6_p833_Storni
work_keys_str_mv AT stornimm tolypothrixtenuisstressresponsetonickel
AT zaccaromc tolypothrixtenuisstressresponsetonickel
AT capanoa tolypothrixtenuisstressresponsetonickel
AT stellaam tolypothrixtenuisstressresponsetonickel
AT zulpag tolypothrixtenuisstressresponsetonickel
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