Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems

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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.

Detalles Bibliográficos
Autores principales: Austin, Amy Theresa, Méndez, M. Soledad, Ballaré, Carlos Luis
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2016
Materias:
CARBON CYCLE
PLANT LITTER DECOMPOSITION
PHOTODEGRADATION
LIGNIN
UV RADIATION
Acceso en línea:http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2016austin
Aporte de:
FAUBA Digital - Facultad de Agronomía (UBA) de Universidad de Buenos Aires
id snrd:2016austin
record_format dspace
spelling snrd:2016austin2021-10-15T16:56:07Z Austin, Amy Theresa Méndez, M. Soledad Ballaré, Carlos Luis 2016 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 Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Buenos Aires, Argentina. Fil: Méndez, M. Soledad. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Méndez, M. Soledad. 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. 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 Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Buenos Aires, Argentina. A mechanistic understanding of the controls on carbon storage and losses is essential for our capacity to predict and mitigate human impacts on the global carbon cycle. Plant litter decomposition is an important first step for carbon and nutrient turnover, and litter inputs and losses are essential in determining soil organic matter pools and the carbon balance in terrestrial ecosystems Photodegradation, the photochemical mineralization of organic matter, has been recently identified as a mechanism for previously unexplained high rates of litter mass loss in arid lands; however, the global significance of this process as a control on carbon cycling in terrestrial ecosystems is not known. Here we show that, across a wide range of plant species, photodegradation enhanced subsequent biotic degradation of leaf litter. Moreover, we demonstrate that the mechanism for this enhancement involves increased accessibility to plant litter carbohydrates for microbial enzymes. Photodegradation of plant litter, driven by UV radiation, and especially visible (blue-green) light, reduced the structural and chemical bottleneck imposed by lignin in secondary cell walls. In leaf litter from woody species, specific interactions with UV radiation obscured facilitative effects of solar radiation on biotic decomposition. The generalized effect of sunlight exposure on subsequent microbial activity, mediated by increased accessibility to cell wall polysaccharides, suggests that photodegradation is quantitatively important in determining rates of mass loss, nutrient release, and the carbon balance in a broad range of terrestrial ecosystems application/pdf doi:10.1073/pnas.1516157113 issn:0027-8424 http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2016austin eng info:eu-repo/semantics/openAccess openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 Proceedings of the National Academy of Sciences of the United States of America Vol.113, no.16 4392-4397 http://www.pnas.org/ CARBON CYCLE PLANT LITTER DECOMPOSITION PHOTODEGRADATION LIGNIN UV RADIATION Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems info:eu-repo/semantics/article info:ar-repo/semantics/artículo publishedVersion info:eu-repo/semantics/publishedVersion
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-140
collection FAUBA Digital - Facultad de Agronomía (UBA)
language Inglés
orig_language_str_mv eng
topic CARBON CYCLE
PLANT LITTER DECOMPOSITION
PHOTODEGRADATION
LIGNIN
UV RADIATION
spellingShingle CARBON CYCLE
PLANT LITTER DECOMPOSITION
PHOTODEGRADATION
LIGNIN
UV RADIATION
Austin, Amy Theresa
Méndez, M. Soledad
Ballaré, Carlos Luis
Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
topic_facet CARBON CYCLE
PLANT LITTER DECOMPOSITION
PHOTODEGRADATION
LIGNIN
UV RADIATION
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.
format Artículo
Artículo
publishedVersion
publishedVersion
author Austin, Amy Theresa
Méndez, M. Soledad
Ballaré, Carlos Luis
author_facet Austin, Amy Theresa
Méndez, M. Soledad
Ballaré, Carlos Luis
author_sort Austin, Amy Theresa
title Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
title_short Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
title_full Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
title_fullStr Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
title_full_unstemmed Photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
title_sort photodegradation alleviates the lignin bottleneck for carbon turnover in terrestrial ecosystems
publishDate 2016
url http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2016austin
work_keys_str_mv AT austinamytheresa photodegradationalleviatestheligninbottleneckforcarbonturnoverinterrestrialecosystems
AT mendezmsoledad photodegradationalleviatestheligninbottleneckforcarbonturnoverinterrestrialecosystems
AT ballarecarlosluis photodegradationalleviatestheligninbottleneckforcarbonturnoverinterrestrialecosystems
_version_ 1827450747224064000

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