Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins

Autores
Jasid, Sebastián; Simontacchi, Marcela; Bartoli, Carlos Guillermo; Puntarulo, Susana
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nitric oxide (NO) generation by soybean (Glycine max var. ADM 4800) chloroplasts was studied as an endogenous product assessed by the electron paramagnetic resonance spin-trapping technique. Nitrite and L-arginine (Arg) are substrates for enzymatic activities considered to be the possible sources of NO in plants. Soybean chloroplasts showed a NO production of 3.2 ± 0.2 nmol min-1 mg-1 protein in the presence of 1 mM NaNO 2. Inhibition of photosynthetic electron flow by 3-(3,4- dichlorophenyl)-1,1-dimethyl urea resulted in a lower rate (1.21 ± 0.04 nmol min-1 mg-1 protein) of NO generation. Chloroplasts incubated with 1 mM Arg showed NO production of 0.76 ± 0.04 nmol min -1 mg-1 protein that was not affected either by omission of Ca2+ or by supplementation with Ca2+ and calmodulin to the incubation medium. This production was inhibited when chloroplasts were incubated in the presence of NO synthase inhibitors Nω,-nitro- L-Arg methyl ester hydrochloride and Nω-nitro-L-Arg. In vitro exposure of chloroplasts to an NO donor (250 μM S-nitrosoglutathione) decreased lipid radical content in membranes by 29%; however, incubation in the presence of 25 μM peroxynitrite (ONOO-) led to an increase in lipid-derived radicals (34%). The effect of ONOO- on protein oxidation was determined by western blotting, showing an increase in carbonyl content either in stroma or thylakoid proteins as compared to controls. Moreover, ONOO- treatment significantly affected both O2 evolution and chlorophyll fluorescence in thylakoids. Data reported here suggest that NO is an endogenous metabolite in soybean chloroplasts and that reactive nitrogen species could exert either antioxidant or prooxidant effects on chloroplast macromolecules.
Instituto de Fisiología Vegetal
Materia
Ciencias Agrarias
Nitric oxide
Nitrogen
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82984

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spelling Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteinsJasid, SebastiánSimontacchi, MarcelaBartoli, Carlos GuillermoPuntarulo, SusanaCiencias AgrariasNitric oxideNitrogenNitric oxide (NO) generation by soybean (Glycine max var. ADM 4800) chloroplasts was studied as an endogenous product assessed by the electron paramagnetic resonance spin-trapping technique. Nitrite and L-arginine (Arg) are substrates for enzymatic activities considered to be the possible sources of NO in plants. Soybean chloroplasts showed a NO production of 3.2 ± 0.2 nmol min-1 mg-1 protein in the presence of 1 mM NaNO 2. Inhibition of photosynthetic electron flow by 3-(3,4- dichlorophenyl)-1,1-dimethyl urea resulted in a lower rate (1.21 ± 0.04 nmol min-1 mg-1 protein) of NO generation. Chloroplasts incubated with 1 mM Arg showed NO production of 0.76 ± 0.04 nmol min -1 mg-1 protein that was not affected either by omission of Ca2+ or by supplementation with Ca2+ and calmodulin to the incubation medium. This production was inhibited when chloroplasts were incubated in the presence of NO synthase inhibitors Nω,-nitro- L-Arg methyl ester hydrochloride and Nω-nitro-L-Arg. In vitro exposure of chloroplasts to an NO donor (250 μM S-nitrosoglutathione) decreased lipid radical content in membranes by 29%; however, incubation in the presence of 25 μM peroxynitrite (ONOO-) led to an increase in lipid-derived radicals (34%). The effect of ONOO- on protein oxidation was determined by western blotting, showing an increase in carbonyl content either in stroma or thylakoid proteins as compared to controls. Moreover, ONOO- treatment significantly affected both O2 evolution and chlorophyll fluorescence in thylakoids. Data reported here suggest that NO is an endogenous metabolite in soybean chloroplasts and that reactive nitrogen species could exert either antioxidant or prooxidant effects on chloroplast macromolecules.Instituto de Fisiología Vegetal2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1246-1255http://sedici.unlp.edu.ar/handle/10915/82984enginfo:eu-repo/semantics/altIdentifier/issn/0032-0889info:eu-repo/semantics/altIdentifier/doi/10.1104/pp.106.086918info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:45Zoai:sedici.unlp.edu.ar:10915/82984Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:45.98SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
title Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
spellingShingle Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
Jasid, Sebastián
Ciencias Agrarias
Nitric oxide
Nitrogen
title_short Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
title_full Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
title_fullStr Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
title_full_unstemmed Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
title_sort Chloroplasts as a nitric oxide cellular source : Effect of reactive nitrogen species on chloroplastic lipids and proteins
dc.creator.none.fl_str_mv Jasid, Sebastián
Simontacchi, Marcela
Bartoli, Carlos Guillermo
Puntarulo, Susana
author Jasid, Sebastián
author_facet Jasid, Sebastián
Simontacchi, Marcela
Bartoli, Carlos Guillermo
Puntarulo, Susana
author_role author
author2 Simontacchi, Marcela
Bartoli, Carlos Guillermo
Puntarulo, Susana
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Agrarias
Nitric oxide
Nitrogen
topic Ciencias Agrarias
Nitric oxide
Nitrogen
dc.description.none.fl_txt_mv Nitric oxide (NO) generation by soybean (Glycine max var. ADM 4800) chloroplasts was studied as an endogenous product assessed by the electron paramagnetic resonance spin-trapping technique. Nitrite and L-arginine (Arg) are substrates for enzymatic activities considered to be the possible sources of NO in plants. Soybean chloroplasts showed a NO production of 3.2 ± 0.2 nmol min-1 mg-1 protein in the presence of 1 mM NaNO 2. Inhibition of photosynthetic electron flow by 3-(3,4- dichlorophenyl)-1,1-dimethyl urea resulted in a lower rate (1.21 ± 0.04 nmol min-1 mg-1 protein) of NO generation. Chloroplasts incubated with 1 mM Arg showed NO production of 0.76 ± 0.04 nmol min -1 mg-1 protein that was not affected either by omission of Ca2+ or by supplementation with Ca2+ and calmodulin to the incubation medium. This production was inhibited when chloroplasts were incubated in the presence of NO synthase inhibitors Nω,-nitro- L-Arg methyl ester hydrochloride and Nω-nitro-L-Arg. In vitro exposure of chloroplasts to an NO donor (250 μM S-nitrosoglutathione) decreased lipid radical content in membranes by 29%; however, incubation in the presence of 25 μM peroxynitrite (ONOO-) led to an increase in lipid-derived radicals (34%). The effect of ONOO- on protein oxidation was determined by western blotting, showing an increase in carbonyl content either in stroma or thylakoid proteins as compared to controls. Moreover, ONOO- treatment significantly affected both O2 evolution and chlorophyll fluorescence in thylakoids. Data reported here suggest that NO is an endogenous metabolite in soybean chloroplasts and that reactive nitrogen species could exert either antioxidant or prooxidant effects on chloroplast macromolecules.
Instituto de Fisiología Vegetal
description Nitric oxide (NO) generation by soybean (Glycine max var. ADM 4800) chloroplasts was studied as an endogenous product assessed by the electron paramagnetic resonance spin-trapping technique. Nitrite and L-arginine (Arg) are substrates for enzymatic activities considered to be the possible sources of NO in plants. Soybean chloroplasts showed a NO production of 3.2 ± 0.2 nmol min-1 mg-1 protein in the presence of 1 mM NaNO 2. Inhibition of photosynthetic electron flow by 3-(3,4- dichlorophenyl)-1,1-dimethyl urea resulted in a lower rate (1.21 ± 0.04 nmol min-1 mg-1 protein) of NO generation. Chloroplasts incubated with 1 mM Arg showed NO production of 0.76 ± 0.04 nmol min -1 mg-1 protein that was not affected either by omission of Ca2+ or by supplementation with Ca2+ and calmodulin to the incubation medium. This production was inhibited when chloroplasts were incubated in the presence of NO synthase inhibitors Nω,-nitro- L-Arg methyl ester hydrochloride and Nω-nitro-L-Arg. In vitro exposure of chloroplasts to an NO donor (250 μM S-nitrosoglutathione) decreased lipid radical content in membranes by 29%; however, incubation in the presence of 25 μM peroxynitrite (ONOO-) led to an increase in lipid-derived radicals (34%). The effect of ONOO- on protein oxidation was determined by western blotting, showing an increase in carbonyl content either in stroma or thylakoid proteins as compared to controls. Moreover, ONOO- treatment significantly affected both O2 evolution and chlorophyll fluorescence in thylakoids. Data reported here suggest that NO is an endogenous metabolite in soybean chloroplasts and that reactive nitrogen species could exert either antioxidant or prooxidant effects on chloroplast macromolecules.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/82984
url http://sedici.unlp.edu.ar/handle/10915/82984
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0032-0889
info:eu-repo/semantics/altIdentifier/doi/10.1104/pp.106.086918
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1246-1255
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