Sucrose content, lignocellulose accumulation and in vitro digestibility of sugarcane internodes depicted in relation to internode maturation stage and Saccharum genotypes

Autor(es)

Collucci, Daniel ^[1] ; Bueno, Raphael C. A. ^[1] ; Milagres, Adriane M. F. ^[1] ; Ferraz, Andre ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biotecnol, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 139, NOV 1 2019.
• Citações Web of Science: 0

Resumo

Sugarcane hybrids acquired several characteristics through plant breeding, including high sucrose and lignocellulose production. Recently, biomass-based industries designed to produce high-value chemicals and fuels from whole plant biomass encouraged new breeding efforts to develop plants with high sucrose yields and low lignocellulose recalcitrance. The present study utilized four experimental sugarcane hybrids to evaluate the dynamics of sucrose and lignocellulose accumulation, lignocellulose composition, and enzymatic digestibility during internode development. During the internode maturation stages, the sucrose content increased while the lignocellulose fraction presented an increased lignin and decreased glucan content. Enzymatic digestibility and lignin content of the lignocellulose fraction displayed an inversely related pattern, and the first internode was two-fold more digestible than mature intemodes, indicating that digestibility decreases significantly with internode maturation and tissue lignification. Some sugarcane hybrids (H89 and H58) combined desirable phenotype characteristics (high sucrose yield and low lignocellulose recalcitrance) that were not detected in H140 and H321. Proper molecular markers discriminating these samples will help to further design breeding steps to produce sugarcane modern hybrids combining high sucrose yields and low lignocellulose recalcitrance. (AU)

• Processo FAPESP: 16/02985-2 - Avaliação da correlação entre o processo de acúmulo de sacarose em cana de açúcar e a digestibilidade da biomassa lignocelulósica
• Beneficiário: Raphael Cardoso de Assis Bueno
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 14/06923-6 - Recalcitrância da biomassa de cana-de-açúcar: fundamentos relacionados à formação da parede celular, ao pré-tratamento e à digestão enzimática, aplicados no desenvolvimento de novos modelos de biorrefinarias
• Beneficiário: Andre Luis Ferraz
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático