Influence of the radial stem composition on the thermal behaviour of miscanthus and sorghum genotypes

Chupin Lucie, de Ridder Dieter, Clément-Vidal Anne, Soutiras Armelle, Gineau Emilie, Mouille Gregory, Arnoult Stéphanie, Brancourt-Hulmel Maryse, Lapierre Catherine, Pot David, Vincent Luc, Mija Alice, Navard Patrick. 2017. Influence of the radial stem composition on the thermal behaviour of miscanthus and sorghum genotypes. Carbohydrate Polymers, 167 : 12-19.

https://doi.org/10.1016/j.carbpol.2017.03.002

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Quartile : Q1, Sujet : CHEMISTRY, APPLIED / Quartile : Q1, Sujet : POLYMER SCIENCE / Quartile : Q1, Sujet : CHEMISTRY, ORGANIC

Résumé : The hypothesis made is that thermal resistance of sorghum and miscanthus stem pieces taken at well-defined positions of the stem is simply related to their biochemical composition. For miscanthus, two different genotypes and two internode levels were selected. For each region, the stem was divided into three radial layers. For sorghum, two different genotypes were selected and the stem was divided into the same three radial layers. The results show that the thermal analysis is only sensitive to very large variations of compositions. But aside of such large composition differences, it is impossible to correlate thermal effects to biochemical composition even on very small size, well-identified pieces of plant materials. The interplay between sugar-based components, lignin and minerals is totally blurring the thermal response. Extreme care must be exercised when willing to explain why a given plant material has a thermal behaviour different of another plant material.

Mots-clés Agrovoc : Sorghum bicolor, Miscanthus, génotype, composition chimique, propriété thermochimique, température, biomasse, lignocellulose, tige, propriété physicochimique

Mots-clés géographiques Agrovoc : France, Chine

Classification Agris : F60 - Physiologie et biochimie végétale

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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