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<p>The research objective is to analyze the potential use of açaí stones in the production of ligninolytic enzymes (LMEs) by fungi isolated from the leaf litter of Amazonian riparian forests. The investigation used solid (SSF) and submerged (SmF) fermentation to evaluate the enzymatic activity of the isolates, with results showing that SSF favored the production of Lacase (Lac) in isolates of <i>Trametes</i> spp., while <i>Syncephalastrum sympodiale</i> had activity only of manganese peroxidase (MnP) and lignin peroxidase (LiP). A1SSI02 was the isolate that achieved the greatest reduction in residual biomass loss (39.8%) in SSF and the greatest reduction in the lignin content of the stone degraded (24.3%). Microscopic observations revealed structural changes in the cell wall of the açaí stones caused by the enzymatic action of the fungi. FTIR analysis confirmed the degradation of lignin, with changes in the functional groups of the substrate. The findings suggest that using the açaí stone as a substrate for producing LMEs might be a sustainable strategy for managing this agro-industrial waste and potential source for biotechnological applications, especially given the high Lac production observed in SFF with isolates of <i>Trametes</i>. This study also highlights the first report of <i>S. sympodiale</i> in Amazonian leaf litter.</p>

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Açaí stone valorization as a substrate for the production of ligninolytic enzymes by Amazonian litter fungi

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Iêda Alana Leite de Sousa,
  • Renan C. e Silva,
  • Elesandra da S. Araujo,
  • Alessandra de J. Boari,
  • Lina Bufalino,
  • Nelson R. Ferreira,
  • Alberdan S. Santos

摘要

The research objective is to analyze the potential use of açaí stones in the production of ligninolytic enzymes (LMEs) by fungi isolated from the leaf litter of Amazonian riparian forests. The investigation used solid (SSF) and submerged (SmF) fermentation to evaluate the enzymatic activity of the isolates, with results showing that SSF favored the production of Lacase (Lac) in isolates of Trametes spp., while Syncephalastrum sympodiale had activity only of manganese peroxidase (MnP) and lignin peroxidase (LiP). A1SSI02 was the isolate that achieved the greatest reduction in residual biomass loss (39.8%) in SSF and the greatest reduction in the lignin content of the stone degraded (24.3%). Microscopic observations revealed structural changes in the cell wall of the açaí stones caused by the enzymatic action of the fungi. FTIR analysis confirmed the degradation of lignin, with changes in the functional groups of the substrate. The findings suggest that using the açaí stone as a substrate for producing LMEs might be a sustainable strategy for managing this agro-industrial waste and potential source for biotechnological applications, especially given the high Lac production observed in SFF with isolates of Trametes. This study also highlights the first report of S. sympodiale in Amazonian leaf litter.