Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.

Reactive oxygen species such as hydrogen peroxide have the potential to alter metabolic rates of marine prokaryotes, ultimately impacting the cycling and bioavailability of nutrients and carbon. We studied the influence of H2O2 on prokaryotic heterotrophic production (PHP) and extracellular enzymati...

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Autores principales:	Federico Baltar, Thomas Reinthaler, Gerhard J Herndl, Jarone Pinhassi
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1077f5ad8e084ba5a7f7019c7dd86b74
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spelling	oai:doaj.org-article:1077f5ad8e084ba5a7f7019c7dd86b742021-11-18T07:49:36ZMajor effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.1932-620310.1371/journal.pone.0061051https://doaj.org/article/1077f5ad8e084ba5a7f7019c7dd86b742013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23593386/?tool=EBIhttps://doaj.org/toc/1932-6203Reactive oxygen species such as hydrogen peroxide have the potential to alter metabolic rates of marine prokaryotes, ultimately impacting the cycling and bioavailability of nutrients and carbon. We studied the influence of H2O2 on prokaryotic heterotrophic production (PHP) and extracellular enzymatic activities (i.e., β-glucosidase [BGase], leucine aminopeptidase [LAPase] and alkaline phosphatase [APase]) in the subtropical Atlantic. With increasing concentrations of H2O2 in the range of 100-1000 nM, LAPase, APase and BGase were reduced by up to 11, 23 and 62%, respectively, in the different water layers. Incubation experiments with subsurface waters revealed a strong inhibition of all measured enzymatic activities upon H2O2 amendments in the range of 10-500 nM after 24 h. H2O2 additions also reduced prokaryotic heterotrophic production by 36-100% compared to the rapid increases in production rates occurring in the unamended controls. Our results indicate that oxidative stress caused by H2O2 affects prokaryotic growth and hydrolysis of specific components of the organic matter pool. Thus, we suggest that oxidative stress may have important consequences on marine carbon and energy fluxes.Federico BaltarThomas ReinthalerGerhard J HerndlJarone PinhassiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 4, p e61051 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Federico Baltar Thomas Reinthaler Gerhard J Herndl Jarone Pinhassi Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
description	Reactive oxygen species such as hydrogen peroxide have the potential to alter metabolic rates of marine prokaryotes, ultimately impacting the cycling and bioavailability of nutrients and carbon. We studied the influence of H2O2 on prokaryotic heterotrophic production (PHP) and extracellular enzymatic activities (i.e., β-glucosidase [BGase], leucine aminopeptidase [LAPase] and alkaline phosphatase [APase]) in the subtropical Atlantic. With increasing concentrations of H2O2 in the range of 100-1000 nM, LAPase, APase and BGase were reduced by up to 11, 23 and 62%, respectively, in the different water layers. Incubation experiments with subsurface waters revealed a strong inhibition of all measured enzymatic activities upon H2O2 amendments in the range of 10-500 nM after 24 h. H2O2 additions also reduced prokaryotic heterotrophic production by 36-100% compared to the rapid increases in production rates occurring in the unamended controls. Our results indicate that oxidative stress caused by H2O2 affects prokaryotic growth and hydrolysis of specific components of the organic matter pool. Thus, we suggest that oxidative stress may have important consequences on marine carbon and energy fluxes.
format	article
author	Federico Baltar Thomas Reinthaler Gerhard J Herndl Jarone Pinhassi
author_facet	Federico Baltar Thomas Reinthaler Gerhard J Herndl Jarone Pinhassi
author_sort	Federico Baltar
title	Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
title_short	Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
title_full	Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
title_fullStr	Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
title_full_unstemmed	Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.
title_sort	major effect of hydrogen peroxide on bacterioplankton metabolism in the northeast atlantic.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/1077f5ad8e084ba5a7f7019c7dd86b74
work_keys_str_mv	AT federicobaltar majoreffectofhydrogenperoxideonbacterioplanktonmetabolisminthenortheastatlantic AT thomasreinthaler majoreffectofhydrogenperoxideonbacterioplanktonmetabolisminthenortheastatlantic AT gerhardjherndl majoreffectofhydrogenperoxideonbacterioplanktonmetabolisminthenortheastatlantic AT jaronepinhassi majoreffectofhydrogenperoxideonbacterioplanktonmetabolisminthenortheastatlantic
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Major effect of hydrogen peroxide on bacterioplankton metabolism in the Northeast Atlantic.

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