Monolignol acylation and lignin structure in non-woody plants: A 2D-NMR study.
2008
Martínez, Ángel T. | Rencoret, Jorge | Marques, Gisela | Gutiérrez Suárez, Ana | Ibarra, David | Jiménez-Barbero, Jesús | Río Andrade, José Carlos del
2D NMR revealed a correspondence between the molecular structure of lignins and their degree of acylation in several nonwoody angiosperms characterized by different lignin acylation types (acetate and/or p-coumarate esters) and extents (up to more that 90% of units). Some of the lignin substructures identified showed that acylation is produced at the monolignol level. Direct evidence was also provided by GC-MS identification of γ-acetylated sinapyl alcohol among plant extractives. Taking the above findings together, it is proposed that some angiosperms could use monolignol acylation as a mechanism to regulate the structure of lignin. In this way, acylation would result in lower presence of resinols and other β-β' interunit linkages in S-rich lignins, promoting formation of a highly-etherified (β-O-4' linked) and more labile lignin polymer. In contrast, low (or null) acylation would result in lignins with higher content of C-C interunit linkages, that will be more recalcitrant towards chemical and/or biological degradation.
اظهر المزيد [+] اقل [-]The study was funded by the BIORENEW EU-project (NMP2-CT-2006-26456), and the Spanish projects BIO2005-3569, BIO2007-28719-E, BIO2007-28720-E and AGL2005-01748.
اظهر المزيد [+] اقل [-]Peer reviewed
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Instituto de Recursos Naturales y Agrobiología Sevilla