Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw

Rosado, Mario J.; Rencoret, Jorge; Marques, Gisela; Gutiérrez Suárez, Ana; Río Andrade, José Carlos del; CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)

Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw

17 páginas.- 6 figuras.- 5 tablas.- referencias.- We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).

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Main Authors:	Rosado, Mario J., Rencoret, Jorge, Marques, Gisela, Gutiérrez Suárez, Ana, Río Andrade, José Carlos del
Other Authors:	CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Format:	artículo biblioteca
Language:	English
Published:	Frontiers Media 2021-02-19
Subjects:	Ferulates, Grasses, Lignin, p-coumarates, Sinapyl p-coumarates, Tricin,
Online Access:	http://hdl.handle.net/10261/235232 http://dx.doi.org/10.13039/501100000780
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spelling	dig-irnas-es-10261-2352322021-04-12T05:57:18Z Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw Rosado, Mario J. Rencoret, Jorge Marques, Gisela Gutiérrez Suárez, Ana Río Andrade, José Carlos del CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI) European Commission Ministerio de Ciencia, Innovación y Universidades (España) Rosado, Mario J. [0000-0001-6313-1890] Rencoret, Jorge [0000-0003-2728-7331] Marques, Gisela [0000-0002-6431-8267] Gutiérrez Suárez, Ana [0000-0002-8823-9029] Río Andrade, José Carlos del [0000-0002-3040-6787] Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin 17 páginas.- 6 figuras.- 5 tablas.- referencias.- We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI). Rice (Oryza sativa L.) is a major cereal crop used for human nutrition worldwide. Harvesting and processing of rice generates huge amounts of lignocellulosic by-products such as rice husks and straw, which present important lignin contents that can be used to produce chemicals and materials. In this work, the structural characteristics of the lignins from rice husks and straw have been studied in detail. For this, whole cell walls of rice husks and straw and their isolated lignin preparations were thoroughly analyzed by an array of analytical techniques, including pyrolysis coupled to gas chromatography-mass spectrometry (Py-GC/MS), nuclear magnetic resonance (NMR), and derivatization followed by reductive cleavage (DFRC). The analyses revealed that both lignins, particularly the lignin from rice husks, were highly enriched in guaiacyl (G) units, and depleted in p-hydroxyphenyl (H) and syringyl (S) units, with H:G:S compositions of 7:81:12 (for rice husks) and 5:71:24 (for rice straw). These compositions were reflected in the relative abundances of the different interunit linkages. Hence, the lignin from rice husks were depleted in β–O–4′ alkyl-aryl ether units (representing 65% of all inter-unit linkages), but presented important amounts of β–5′ (phenylcoumarans, 23%) and other condensed units. On the other hand, the lignin from rice straw presented higher levels of β–O–4′ alkyl-aryl ethers (78%) but lower levels of phenylcoumarans (β–5′, 12%) and other condensed linkages, consistent with a lignin with a slightly higher S/G ratio. In addition, both lignins were partially acylated at the γ-OH of the side-chain (ca. 10–12% acylation degree) with p-coumarates, which overwhelmingly occurred over S-units. Finally, important amounts of the flavone tricin were also found incorporated into these lignins, being particularly abundant in the lignin of rice straw. his study has been funded by the Spanish Project AGL2017-83036-R (financed by Agencia Estatal de Investigación, AEI, and Fondo Europeo de Desarrollo Regional, FEDER). MJR thanks the Spanish Ministry of Science, Innovation and Universities for a FPI fellowship (PRE2018-083267). We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI). Peer reviewed 2021-03-18T11:45:15Z 2021-03-18T11:45:15Z 2021-02-19 artículo http://purl.org/coar/resource_type/c_6501 Frontiers in Plant Science 12: 640475 (2021) http://hdl.handle.net/10261/235232 10.3389/fpls.2021.640475 1664-462X http://dx.doi.org/10.13039/501100000780 PMC7932998 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/AGL2017-83036-R Publisher's version http://dx.doi.org/10.3389/fpls.2021.640475 Sí open Frontiers Media
institution	IRNAS ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-irnas-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del IRNAS España
language	English
topic	Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin
spellingShingle	Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin Rosado, Mario J. Rencoret, Jorge Marques, Gisela Gutiérrez Suárez, Ana Río Andrade, José Carlos del Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
description	17 páginas.- 6 figuras.- 5 tablas.- referencias.- We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).
author2	CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
author_facet	CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI) Rosado, Mario J. Rencoret, Jorge Marques, Gisela Gutiérrez Suárez, Ana Río Andrade, José Carlos del
format	artículo
topic_facet	Ferulates Grasses Lignin p-coumarates Sinapyl p-coumarates Tricin
author	Rosado, Mario J. Rencoret, Jorge Marques, Gisela Gutiérrez Suárez, Ana Río Andrade, José Carlos del
author_sort	Rosado, Mario J.
title	Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
title_short	Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
title_full	Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
title_fullStr	Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
title_full_unstemmed	Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw
title_sort	structural characteristics of the guaiacyl-rich lignins from rice (oryza sativa l.) husks and straw
publisher	Frontiers Media
publishDate	2021-02-19
url	http://hdl.handle.net/10261/235232 http://dx.doi.org/10.13039/501100000780
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Structural Characteristics of the Guaiacyl-Rich Lignins From Rice (Oryza sativa L.) Husks and Straw

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