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Título: | Variations in the composition and structure of the lignins of oat (Avena sativa L.) straws according to variety and planting season |
Autor: | Rencoret, Jorge CSIC ORCID; Marques, Gisela CSIC ORCID; Rosado, Mario J. CSIC ORCID; Benito Jareño, Javier; Barro Losada, Francisco CSIC ORCID ; Gutiérrez Suárez, Ana CSIC ORCID ; Río Andrade, José Carlos del CSIC ORCID | Fecha de publicación: | 1-jul-2023 | Editor: | Elsevier | Citación: | International Journal of Biological Macromolecules 242 Part 2: 124811 (2023) | Resumen: | The differences in the composition and structure of the lignins from straws of different oat (Avena sativa L.) varieties, planted in two seasons (winter and spring), were studied in detail by different analytical techniques such as pyrolysis coupled to gas chromatography–mass spectrometry (Py-GC/MS), two-dimensional nuclear magnetic resonance (2D-NMR), derivatization followed by reductive cleavage (DFRC), and gel permeation chromatography (GPC). Overall, the analyses revealed that oat straw lignins were enriched in guaiacyl (G; 50–56 %) and syringyl (S; 39–44 %) units, with relatively lower amounts of p-hydroxyphenyl (H; 4–6 %) units. The lignins also incorporated significant quantities of p-coumarates (8–14 % of total lignin units), which are acylating the γ-OH of the lignin side chains, and predominantly over the S units. Furthermore, oat straw lignins also incorporated considerable amounts of the flavone tricin (5–12 % of total lignin units). Interestingly, this study revealed that the lignin content and composition of the oat straws vary with genotype and planting season. Since p-coumarates and tricin are high-value aromatic compounds especially attractive from a biorefinery point of view, the information disclosed here is highly relevant to plant breeding programs aimed at developing functional foods and lignin modifications for improved biorefinery applications | Descripción: | 13 páginas.- 6 figuras.- 5 tablas.- 60 referencias.- Supplementary data to this article can be found online at https://doi.org/10.1016/j.ijbiomac.2023.124811 | Versión del editor: | http://dx.doi.org/10.1016/j.ijbiomac.2023.124811 | URI: | http://hdl.handle.net/10261/309738 | DOI: | 10.1016/j.ijbiomac.2023.124811 | ISSN: | 0141-8130 | E-ISSN: | 1879-0003 |
Aparece en las colecciones: | (IRNAS) Artículos (IAS) Artículos |
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