Brancourt-Hulmel Maryse, Arnoult Stéphanie, Cezard L., El Hage F., Gineau Emilie, Girones Jordi, Griveau Yves, Jacquemont M.P., Jaffuel Sylvie, Mignot E., Mouille Gregory, Lapierre Catherine, Legée F., Méchin Valérie, Navard Patrick, Vo Loan T.T., Reymond Matthieu. 2022. A comparative study of maize and miscanthus regarding cell-wall composition and stem anatomy for conversion into bioethanol and polymer composites. BioEnergy Research, 15 (2) : 777-791.
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Résumé : Due to an increasing demand for environmentally sustainable products, miscanthus and maize stover represent interesting lignocellulosic resources for conversion into biofuels and biomaterials. The overall purpose was to compare miscanthus and maize regarding cell-wall composition and stem anatomy for conversion into bioethanol and polymer composites using partial least squares regressions. For each of the two crops, six contrasted genotypes were cultivated in complete block design, and harvested. Internodes below the main cob for maize, and on the first aboveground internode for miscanthus, were analyzed for biochemistry and anatomy. Their digestibility was predicted using crop-specific near infrared calibrations, and the mechanical properties were evaluated in stem-based composites. On average, the internode cross-section of miscanthus anatomy was characterized by a thick rind (26.2%) and few but dense pith-bundles (3.5 nb/mm2), while cell-wall constituted 95.2% of the dry matter with high lignin (243.2 mg/g) and cellulose concentrations (439.7 mg/g). Maize internode-anatomy showed large cross-sections (397.5 mm2), pith with the presence of numerous bundles and non-lignified-pith fractions (22.3% of the section). Its cell-wall biochemistry displayed high concentrations of hemicelluloses, galactose, arabinose, xylose, and ferulic acid. Cell-wall, lignin, and cellulose concentrations were positively correlated with rind-fraction and pith-bundle-density, which explained strong mechanical properties as shown in miscanthus. Hemicelluloses, galactose, arabinose, and ferulic acid concentrations were positively correlated with pith fraction and stem cross-section, revealing high digestibility as shown in maize. This underlines interesting traits for further comparative genetic studies, as maize represents a good model for digestibility and miscanthus for composites.
Mots-clés Agrovoc : propriété mécanique, maïs, Miscanthus, biocarburant, biochimie, durabilité, tige, bioéthanol, polymère
Mots-clés libres : Energy crops, Lignocellulosic biomass, Biomaterials, Polysaccharides, Enzymatic hydrolysis, Biofuels
Agences de financement hors UE : Agence Nationale de la Recherche
Projets sur financement : (FRA) Biomasse pour le futur
Auteurs et affiliations
- Brancourt-Hulmel Maryse, INRAE (FRA) - auteur correspondant
- Arnoult Stéphanie, INRAE (FRA)
- Cezard L., Institut Jean-Pierre Bourgin (FRA)
- El Hage F., Institut Jean-Pierre Bourgin (FRA)
- Gineau Emilie, INRAE (FRA)
- Girones Jordi, CEMEF (FRA)
- Griveau Yves, Institut Jean-Pierre Bourgin (FRA)
- Jacquemont M.P., Institut Jean-Pierre Bourgin (FRA)
- Jaffuel Sylvie, CIRAD-BIOS-UMR AGAP (FRA)
- Mignot E., INRAE (FRA)
- Mouille Gregory, Institut Jean-Pierre Bourgin (FRA)
- Lapierre Catherine, Institut Jean-Pierre Bourgin (FRA)
- Legée F., Institut Jean-Pierre Bourgin (FRA)
- Méchin Valérie, Institut Jean-Pierre Bourgin (FRA)
- Navard Patrick, CEMEF (FRA)
- Vo Loan T.T., CEMEF (FRA)
- Reymond Matthieu, Institut Jean-Pierre Bourgin (FRA)
Source : Cirad-Agritrop (https://agritrop.cirad.fr/606563/)
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