Structural characterization of lignin in four cacti wood: Implications of lignification in the growth form and succulence

dc.creatorJorge Reyes Rivera
dc.creatorRamón Marcos Soto Hernández
dc.creatorGONZALO CANCHE ESCAMILLA
dc.creatorTeresa Terrazas
dc.date2018
dc.date.accessioned2023-07-21T19:18:40Z
dc.date.available2023-07-21T19:18:40Z
dc.identifierhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/1556
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7737116
dc.descriptionWood lignin composition strongly depends on anatomical features and it has been used as a marker for characterizing major plant groups. Wood heterogeneity in Cactaceae is involved in evolutionary and adaptive processes within this group; moreover, it is highly correlated to the species growth form. Here we studied the lignin structure from different types of woods in four Cactaceae species with different stem morphologies (Pereskia lychnidiflora, tree/fibrous wood; Opuntia streptacantha and Pilosocereus chrysacanthus, tree/succulent fibrous wood; Ferocactus hamatacanthus, cylindrical stem/dimorphic wood) in order to determine their relationship with the wood anatomy in an evolutionary-adaptive context. Dioxane lignin was isolated and analyzed by pyrolysis coupled with gas chromatography and mass spectrometry (Py-GC/MS), two-dimensional nuclear magnetic resonance spectroscopy (2D-NMR) and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). The main linkages are the β-O−4′ ether (67–85%), the β-β′ resinol (10–26%) and the β-5′ and α-O−4′ linkages of the phenylcoumaran structures (≤7%). Spirodienone structures have a considerable abundance (5%) in the dimorphic wood of F. hamatacanthus. In addition, low contents (≤3%) of α,β-diaryl ether, α-oxidized β-O−4′ ether and dibenzodioxocin structures were found. The sinapyl- and coniferyl acetates are not part of the wood lignin in any of the studied species. The low (≤5%) γ-acetylation in the F. hamatacanthus and P. chrysacanthus wood lignin is here interpreted as an evidence of a high specialization of the wood elements in the conduction/storage of water. The lignin of the studied Cactaceae is composed predominantly of guaiacyl and syringyl units (S/G: 0.9–16.4). High abundance of syringyl units (62–94%) in three of the four species is considered as a defense mechanism against oxidative agents, it is a very conspicuous trait in the most succulent species with dimorphic wood. Furthermore, it is also associated with ferulates and the herein called γ-acetylated guaiacyl-syringaresinol complexes acting as nucleation sites for lignification and as cross-links between lignin and carbohydrates at the wide-band tracheid-fiber junctions.
dc.formatapplication/pdf
dc.languageeng
dc.relationinfo:eu-repo/semantics/datasetDOI/10.3389/fpls.2018.01518
dc.relationcitation:Reyes-Rivera, J., Soto Hernandez, M., Canché-Escamilla, G., & Terrazas, T. (2018). Structural Characterization of Lignin in Four Cacti Wood: Implications of Lignification in the Growth Form and Succulence. Frontiers in plant science, 9, 1518, https://doi.org/10.3389/fpls.2018.01518.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceFrontiers in plant science, 9, 1518, https://doi.org/10.3389/fpls.2018.01518.
dc.subjectinfo:eu-repo/classification/Autores/CACTACEAE
dc.subjectinfo:eu-repo/classification/Autores/DIMORPHIC WOOD
dc.subjectinfo:eu-repo/classification/Autores/EVOLUTIONARY-ADAPTIVE PROCESSES
dc.subjectinfo:eu-repo/classification/Autores/S-RICH LIGNIN
dc.subjectinfo:eu-repo/classification/Autores/STRUCTURAL PROTECTION
dc.subjectinfo:eu-repo/classification/Autores/SUCCULENCE
dc.subjectinfo:eu-repo/classification/cti/2
dc.subjectinfo:eu-repo/classification/cti/2
dc.titleStructural characterization of lignin in four cacti wood: Implications of lignification in the growth form and succulence
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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