Relationship between the molecular structure of duckweed starch and its in vitro enzymatic degradation kinetics

Autor(es)

de Souza Moretti, Marcia Maria ^{[1, 2]} ; Yu, Wenwen ^[2] ; Zou, Wei ^[2] ; Landi Franco, Celia Maria ^[1] ; Albertin, Liliane Lazzari ^[3] ; Schenk, Peer M. ^[4] ; Gilbert, Robert G. ^{[2, 5]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Inst Biosci Humanities & Exact Sci, Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Queensland, Ctr Nutr & Food Sci, Queensland Alliance Agr & Food Innovat, Brisbane, Qld 4072 - Australia

^[3] Sao Paulo State Univ UNESP, Sch Nat Sci & Engn, Ilha Solteira, SP - Brazil

^[4] Univ Queensland, Sch Agr & Food Sci, Brisbane, Qld 4072 - Australia

^[5] Yangzhou Univ, Coll Agr, Joint Int Res Lab Agr & Agri Prod Safety, Yangzhou 225009, Jiangsu - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Biological Macromolecules; v. 139, p. 244-251, OCT 15 2019.
• Citações Web of Science: 0

Resumo

Starch molecular structural effects in duckweed (Lemna minor and Landoltia punctata) controlling in vitro enzymatic degradation kinetics was studied. The molecular size distributions of fully-branched starches and the chain length distributions (CLDs) of enzymatically debranched duckweed starches were obtained using size-exclusion-chromatography (SEC). The CLDs of both debranched amylose and amylopectin were fitted with models using biologically-meaningful parameters. While there were no significant correlations between amylose content and starch degradation rate, the total amounts of amylose with shorter chain length negatively correlated with undigested starch content, and the amount of amylopectin long chains negatively correlated with the degradation rate coefficient. This provides new knowledge for the utilization of duckweed starches in bioethanol production. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/22136-0 - Estruturas moleculares e cristalinas e seus efeitos sobre a suscetibilidade enzimática de diferentes amidos granulares
• Beneficiário: Marcia Maria de Souza Moretti
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado