Unravelling Chemical Composition of Agave Spines: News from <i>Agave fourcroydes</i> Lem.
2020
Dalia C. Morán-Velázquez | Juan L. Monribot-Villanueva | Matthieu Bourdon | John Z. Tang | Itzel López-Rosas | Luis F. Maceda-López | José L. Villalpando-Aguilar | Lorena Rodríguez-López | Adrien Gauthier | Laura Trejo | Parastoo Azadi | Francisco Vilaplana | José A. Guerrero-Analco | Fulgencio Alatorre-Cobos
Spines are key plant modifications developed to deal against herbivores; however, its physical structure and chemical composition have been little explored in plant species. Here, we took advantage of high-throughput chromatography to characterize chemical composition of <i>Agave fourcroydes</i> Lem. spines, a species traditionally used for fiber extraction. Analyses of structural carbohydrate showed that spines have lower cellulose content than leaf fibers (52 and 72%, respectively) but contain more than 2-fold the hemicellulose and 1.5-fold pectin. Xylose and galacturonic acid were enriched in spines compared to fibers. The total lignin content in spines was 1.5-fold higher than those found in fibers, with elevated levels of syringyl (S) and guaiacyl (G) subunits but similar S/G ratios within tissues. Metabolomic profiling based on accurate mass spectrometry revealed the presence of phenolic compounds including quercetin, kaempferol, (+)-catechin, and (−)-epicatechin in <i>A. fourcroydes</i> spines, which were also detected in situ in spines tissues and could be implicated in the color of these plants’ structures. Abundance of (+)-catechins could also explain proanthocyanidins found in spines. Agave spines may become a plant model to obtain more insights about cellulose and lignin interactions and condensed tannin deposition, which is valuable knowledge for the bioenergy industry and development of naturally dyed fibers, respectively.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Directory of Open Access Journals
Découvrez la collection de ce fournisseur de données dans AGRIS