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Article Dans Une Revue Plants Année : 2020

Unravelling Chemical Composition of Agave Spines: News from Agave fourcroydes Lem.

Dalia C Morán-Velázquez
  • Fonction : Auteur
Juan L Monribot-Villanueva
Matthieu Bourdon
  • Fonction : Auteur
  • PersonId : 1138062
John Z Tang
  • Fonction : Auteur
  • PersonId : 1138063
Luis F Maceda-López
Lorena Rodríguez-López
  • Fonction : Auteur
Parastoo Azadi
  • Fonction : Auteur
  • PersonId : 1106889
José A Guerrero-Analco

Résumé

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 Agave fourcroydes 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 A. fourcroydes 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.
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Dates et versions

hal-03377904 , version 1 (14-10-2021)

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Dalia C Morán-Velázquez, Juan L Monribot-Villanueva, Matthieu Bourdon, John Z Tang, Itzel López-Rosas, et al.. Unravelling Chemical Composition of Agave Spines: News from Agave fourcroydes Lem.. Plants, 2020, 9 (12), pp.1642. ⟨10.3390/plants9121642⟩. ⟨hal-03377904⟩
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