Dual role of lignin in plant litter decomposition in terrestrial ecosystems
- Autores
- Austin, Amy Theresa; Ballaré, Carlos Luis
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Austin, Amy Theresa. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Ballaré, Carlos Luis. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.
Plant litter decomposition is a critical step in the formation of soil organicmatter, themineralizationoforganic nutrients, andthe carbon balance in terrestrial ecosystems. Biotic decomposition in mesic ecosystems is generally negatively correlated with the concentration of lignin, a group of complex aromatic polymers present in plant cell walls that is recalcitrant to enzymatic degradation and serves as a structural barrier impeding microbial access to labile carbon compounds. Although photochemical mineralization of carbon has recently been shown to be important in semiarid ecosystems, litter chemistry controls on photodegradative losses are not understood. We evaluated the importance of litter chemistry on photodegradation of grass litter and cellulose substrates with varying levels of lignin (cellulose-lignin (CL) substrates) under field conditions. Using wavelength-specific light attenuation filters, we found that light-driven mass loss was promoted by both UV and visible radiation. The spectral dependence of photodegradation correlated with the absorption spectrumof ligninbut not of cellulose. Fieldincubationsdemonstrated that increasing lignin concentration reduced biotic decomposition, as expected, but linearly increased photodegradation. In addition, lignin content in CL substrates consistently decreased in photodegradative incubations. We conclude that lignin has a dual role affecting litter decomposition, depending on the dominant driver (biotic or abiotic) controlling carbon turnover. Under photodegradative conditions, lignin is preferentially degraded because it acts as an effective light-absorbing compound over a wide range of wavelengths. This mechanistic understanding of the role of lignin in plant litter decomposition will allow formoreaccurate predictions of carbon dynamics in terrestrial ecosystems. - Fuente
- Proceedings of the National Academy of Sciences of the United States of America
Vol.107, no.10
4618-4622
http://www.nasonline.org/ - Materia
-
CARBON CYCLE
PHOTODEGRADATION
SEMIARID GRASSLANDS
ULTRAVIOLET RADIATION
CARBON
CELLULOSE
LIGNIN
POLYMER
ABSORPTION SPECTROSCOPY
CARBON DYNAMICS
ECOSYSTEM
GRASS
GRASSLAND
LAND BIOME
LIGHT
NONHUMAN
PLANT LITTER
ARGENTINA
BIODEGRADATION, ENVIRONMENTAL
PLANT LEAVES
PLANTS
POACEAE
SOIL
SPECTROPHOTOMETRY - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- acceso abierto
- Repositorio
- Institución
- Universidad de Buenos Aires. Facultad de Agronomía
- OAI Identificador
- snrd:2010Austin
Ver los metadatos del registro completo
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snrd:2010Austin |
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spelling |
Dual role of lignin in plant litter decomposition in terrestrial ecosystemsAustin, Amy TheresaBallaré, Carlos LuisCARBON CYCLEPHOTODEGRADATIONSEMIARID GRASSLANDSULTRAVIOLET RADIATIONCARBONCELLULOSELIGNINPOLYMERABSORPTION SPECTROSCOPYCARBON DYNAMICSECOSYSTEMGRASSGRASSLANDLAND BIOMELIGHTNONHUMANPLANT LITTERARGENTINABIODEGRADATION, ENVIRONMENTALPLANT LEAVESPLANTSPOACEAESOILSPECTROPHOTOMETRYFil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.Fil: Austin, Amy Theresa. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.Fil: Ballaré, Carlos Luis. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina.Plant litter decomposition is a critical step in the formation of soil organicmatter, themineralizationoforganic nutrients, andthe carbon balance in terrestrial ecosystems. Biotic decomposition in mesic ecosystems is generally negatively correlated with the concentration of lignin, a group of complex aromatic polymers present in plant cell walls that is recalcitrant to enzymatic degradation and serves as a structural barrier impeding microbial access to labile carbon compounds. Although photochemical mineralization of carbon has recently been shown to be important in semiarid ecosystems, litter chemistry controls on photodegradative losses are not understood. We evaluated the importance of litter chemistry on photodegradation of grass litter and cellulose substrates with varying levels of lignin (cellulose-lignin (CL) substrates) under field conditions. Using wavelength-specific light attenuation filters, we found that light-driven mass loss was promoted by both UV and visible radiation. The spectral dependence of photodegradation correlated with the absorption spectrumof ligninbut not of cellulose. Fieldincubationsdemonstrated that increasing lignin concentration reduced biotic decomposition, as expected, but linearly increased photodegradation. In addition, lignin content in CL substrates consistently decreased in photodegradative incubations. We conclude that lignin has a dual role affecting litter decomposition, depending on the dominant driver (biotic or abiotic) controlling carbon turnover. Under photodegradative conditions, lignin is preferentially degraded because it acts as an effective light-absorbing compound over a wide range of wavelengths. This mechanistic understanding of the role of lignin in plant litter decomposition will allow formoreaccurate predictions of carbon dynamics in terrestrial ecosystems.2010articleinfo:eu-repo/semantics/articlepublishedVersioninfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfdoi:10.1073/pnas.0909396107issn:0027-8424http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2010AustinProceedings of the National Academy of Sciences of the United States of AmericaVol.107, no.104618-4622http://www.nasonline.org/reponame:FAUBA Digital (UBA-FAUBA)instname:Universidad de Buenos Aires. Facultad de AgronomíaengARGinfo:eu-repo/semantics/openAccessopenAccesshttp://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section42025-09-29T13:41:49Zsnrd:2010Austininstacron:UBA-FAUBAInstitucionalhttp://ri.agro.uba.ar/Universidad públicaNo correspondehttp://ri.agro.uba.ar/greenstone3/oaiserver?verb=ListSetsmartino@agro.uba.ar;berasa@agro.uba.ar ArgentinaNo correspondeNo correspondeNo correspondeopendoar:27292025-09-29 13:41:50.727FAUBA Digital (UBA-FAUBA) - Universidad de Buenos Aires. Facultad de Agronomíafalse |
dc.title.none.fl_str_mv |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
title |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
spellingShingle |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems Austin, Amy Theresa CARBON CYCLE PHOTODEGRADATION SEMIARID GRASSLANDS ULTRAVIOLET RADIATION CARBON CELLULOSE LIGNIN POLYMER ABSORPTION SPECTROSCOPY CARBON DYNAMICS ECOSYSTEM GRASS GRASSLAND LAND BIOME LIGHT NONHUMAN PLANT LITTER ARGENTINA BIODEGRADATION, ENVIRONMENTAL PLANT LEAVES PLANTS POACEAE SOIL SPECTROPHOTOMETRY |
title_short |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
title_full |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
title_fullStr |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
title_full_unstemmed |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
title_sort |
Dual role of lignin in plant litter decomposition in terrestrial ecosystems |
dc.creator.none.fl_str_mv |
Austin, Amy Theresa Ballaré, Carlos Luis |
author |
Austin, Amy Theresa |
author_facet |
Austin, Amy Theresa Ballaré, Carlos Luis |
author_role |
author |
author2 |
Ballaré, Carlos Luis |
author2_role |
author |
dc.subject.none.fl_str_mv |
CARBON CYCLE PHOTODEGRADATION SEMIARID GRASSLANDS ULTRAVIOLET RADIATION CARBON CELLULOSE LIGNIN POLYMER ABSORPTION SPECTROSCOPY CARBON DYNAMICS ECOSYSTEM GRASS GRASSLAND LAND BIOME LIGHT NONHUMAN PLANT LITTER ARGENTINA BIODEGRADATION, ENVIRONMENTAL PLANT LEAVES PLANTS POACEAE SOIL SPECTROPHOTOMETRY |
topic |
CARBON CYCLE PHOTODEGRADATION SEMIARID GRASSLANDS ULTRAVIOLET RADIATION CARBON CELLULOSE LIGNIN POLYMER ABSORPTION SPECTROSCOPY CARBON DYNAMICS ECOSYSTEM GRASS GRASSLAND LAND BIOME LIGHT NONHUMAN PLANT LITTER ARGENTINA BIODEGRADATION, ENVIRONMENTAL PLANT LEAVES PLANTS POACEAE SOIL SPECTROPHOTOMETRY |
dc.description.none.fl_txt_mv |
Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Austin, Amy Theresa. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Ballaré, Carlos Luis. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Ballaré, Carlos Luis. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. Plant litter decomposition is a critical step in the formation of soil organicmatter, themineralizationoforganic nutrients, andthe carbon balance in terrestrial ecosystems. Biotic decomposition in mesic ecosystems is generally negatively correlated with the concentration of lignin, a group of complex aromatic polymers present in plant cell walls that is recalcitrant to enzymatic degradation and serves as a structural barrier impeding microbial access to labile carbon compounds. Although photochemical mineralization of carbon has recently been shown to be important in semiarid ecosystems, litter chemistry controls on photodegradative losses are not understood. We evaluated the importance of litter chemistry on photodegradation of grass litter and cellulose substrates with varying levels of lignin (cellulose-lignin (CL) substrates) under field conditions. Using wavelength-specific light attenuation filters, we found that light-driven mass loss was promoted by both UV and visible radiation. The spectral dependence of photodegradation correlated with the absorption spectrumof ligninbut not of cellulose. Fieldincubationsdemonstrated that increasing lignin concentration reduced biotic decomposition, as expected, but linearly increased photodegradation. In addition, lignin content in CL substrates consistently decreased in photodegradative incubations. We conclude that lignin has a dual role affecting litter decomposition, depending on the dominant driver (biotic or abiotic) controlling carbon turnover. Under photodegradative conditions, lignin is preferentially degraded because it acts as an effective light-absorbing compound over a wide range of wavelengths. This mechanistic understanding of the role of lignin in plant litter decomposition will allow formoreaccurate predictions of carbon dynamics in terrestrial ecosystems. |
description |
Fil: Austin, Amy Theresa. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 |
dc.type.none.fl_str_mv |
article info:eu-repo/semantics/article publishedVersion info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
doi:10.1073/pnas.0909396107 issn:0027-8424 http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2010Austin |
identifier_str_mv |
doi:10.1073/pnas.0909396107 issn:0027-8424 |
url |
http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2010Austin |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
ARG |
dc.source.none.fl_str_mv |
Proceedings of the National Academy of Sciences of the United States of America Vol.107, no.10 4618-4622 http://www.nasonline.org/ reponame:FAUBA Digital (UBA-FAUBA) instname:Universidad de Buenos Aires. Facultad de Agronomía |
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Universidad de Buenos Aires. Facultad de Agronomía |
repository.name.fl_str_mv |
FAUBA Digital (UBA-FAUBA) - Universidad de Buenos Aires. Facultad de Agronomía |
repository.mail.fl_str_mv |
martino@agro.uba.ar;berasa@agro.uba.ar |
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13.070432 |