Produção e caracterização de celulases e hemicelulases por um consórcio entre Pleurotus ostreatus e Aspergillus niger cultivados em resíduos agroindustriais

Autores

DOI:

https://doi.org/10.33448/rsd-v10i10.19020

Palavras-chave:

Fermentação em estado sólido; Ascomiceto; Basidiomiceto; Enzimas (Hemi) celulolíticas; Prospecção.

Resumo

A biossíntese de enzimas utilizando resíduos agrícolas por fermentação em estado sólido (SSF) e o estudo de suas propriedades físico-químicas são abordagens significativas para melhorar a hidrólise da biomassa. Dentre elas, as β-glicosidases e β-xilosidases são enzimas-chave na despolimerização da lignocelulose, que atuam na clivagem de oligossacarídeos em monossacarídeos. Neste estudo, foi investigada a produção de hemicelulases e celulases por monoculturas de Pleurotus ostreatus e Aspergillus niger ou em consórcio, utilizando bagaço de cana-de-açúcar (SB) e farelo de trigo (WB) como substratos. As maiores atividades enzimáticas foram observadas no extrato bruto produzido pelo consórcio P. ostreatus PLO6 e A. niger SCBM4 com 98,5, 62,9, 3,8, 12,4, 13,3 e 20,2 U/g para β-glucosidase (β-glu), β-xilosidase (β-xyl), celulase de papel de filtro (FPase), xilanase (Xyl), exoglucanase (Exgl) e endoglucanase (Engl), respectivamente. Os efeitos do pH e da temperatura em β-glu e β-xyl foram caracterizados. As atividades ótimas foram obtidas em pH 4,0 e 45 °C para β-glu e 3,5 e 55 °C para β-xyl. Ambas as enzimas foram estáveis em pH ácido e apresentaram termoestabilidade. Os resultados indicaram que o coquetel enzimático demonstrou características potenciais para futuras aplicações em sacarificações. A utilização do bagaço da cana-de-açúcar e do farelo de trigo para o crescimento microbiano contribuiu para agregar valor a esses subprodutos.

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Publicado

14/08/2021

Como Citar

MARTINS, I. M. N. B. R. .; GOMES, L. S. V. O. .; PASQUINI, D. .; BAFFI, M. A. . Produção e caracterização de celulases e hemicelulases por um consórcio entre Pleurotus ostreatus e Aspergillus niger cultivados em resíduos agroindustriais. Research, Society and Development, [S. l.], v. 10, n. 10, p. e396101019020, 2021. DOI: 10.33448/rsd-v10i10.19020. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/19020. Acesso em: 27 jul. 2024.

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Seção

Ciências Agrárias e Biológicas