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DIGITAL.CSIC
Conference object . 2018 . Peer-reviewed
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Caracterización molecular de la fracción orgánica del suelo Glomalina Fácilmente Extraible (GFE)

Authors: Lozano, Elena; Mataix-Solera, Jorge; Arcenegui, V.; González-Vila, Francisco Javier; González-Pérez, José Antonio;

Caracterización molecular de la fracción orgánica del suelo Glomalina Fácilmente Extraible (GFE)

Abstract

[ES]: Glomalina Fácilmente Extraible (GFE) es un término operacional aplicado a una fracción orgánica del suelo que se supone contiene principalmente proteínas del suelo relacionadas con glomalina (PSRG), una glicoproteina abundante en los suelos y producida en las hifas y esporas de hongos micorrícicos arbusculares (HMA). La fracción GFE es la más inmunoreactiva al anticuerpo monoclonal MAb32B11 de glomus y está relacionada con características relavantes de los suelos, como su estabilidad y resiliencia a la degradación, formación de agregados y estabilización de carbono orgánico. En este estudio realizamos una caracterización molecular detallada “fingerprint” de los productos de pirólisis de la fracción GFE extraidas de un suelo mediterráneo bajo diferentes cubiertas vegetales, afectado y no afectado por un incendio y en distintas épocas del año. Se identificaron un total de 139 compuestos que se agruparon dependiedo de su probable origen biogénico. Se observa escasa variación entre muestras, indicando que la GFE es una fracción estructuralmente estable, compuesta principalmente de polisacáridos (42 ± 5 %), compuestos aromáticos no específicos (24 ± 3 %) e hidroaromáticos (12 ± 3 %). El 20 % restante lo componen hidrocarburos policíclicos aromáticos (8 %), lípidos (7 % ácidos grasos y pares alcano/alqueno), lignina (5 %) y derivados de proteina/péptidos (2 %).

[EN]: Easily Extractable Glomalin (EEG) is an operational term applied to an organic fraction of the soil supposed to contain mainly glomalin-related soil proteins (GRSP), a glycoprotein abundantly found in soils that is produced in the hyphae and spores of arbuscular mycorrhizal fungi (AMF). The EEG fraction is the most immunoreactive to glomus monoclonal antibody MAb32B11 and is related to relavant soil characteristics, such as its stability and resilience to degradation, formation of aggregates and stabilization of organic carbon. In this study we carried out a detailed molecular characterization >fingerprint> of the pyrolysis products of the GFE fraction extracted from a Mediterranean soil beneath different plant covers, affected and not affected by fire and at different times of the year. A total of 139 compounds were identified and grouped according to their probable biogenic origin. There is little variation between samples, indicating that the EEG is a structurally stable soil organic fraction, composed mainly of polysaccharides (42 ± 5%), non-specific aromatic compounds (24 ± 3%) and hydro-aromatics (12 ± 3%). The remaining 20% contains aromatic polycyclic hydrocarbons (8%), lipids (7% fatty acids and alkane/alkene pairs), lignin (5%) and protein/peptide derivatives (2%).

4 páginas.-- 2 figuras.-- 7 referencias.-- Comunicación presentada en el VIII Congreso Ibérico de las Ciencias del Suelo. VIII Congresso Ibérico de Ciências do Solo. DONOSTIA-SAN SEBASTIÁN. 20 - 22 junio 2018..-- El documento completo se encuentra para su descarga en http://www.cics2018.com/libro-de-abstracts/

Los autores agradecen la financiación de los proyectos “POSTFIRE” (CGL2013- 47862-C2-1-R), “POSTFIRE_CARE” (CGL2016-75178-C2-1-R) e “INTERCARBON” (CGL2016-78937-R) financiados por la Agencia Estatal de Investigación (AEI) y por la Unión Europea a través del Fondo Europeo de Desarrollo Regional (FEDER),

Peer Reviewed

Country
Spain
Keywords

Glomalinas, Pirólisis analítica, PSRG, Py-GC/MS, Materia orgánica

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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