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Yeasts are ideal for SCP production due to their high protein content, lack of cholesterol, rapid growth, and minimal nutritional needs. This study evaluated 216 yeast isolates from Brazilian biomes, sugarcane, wine, and sourdough for SCP potential. The isolates were tested for hydrogen sulfide, biogenic amines, gelatinase production, and growth on YPD agar under stress conditions. Of the 216, 66 produced hydrogen sulfide and 20 produced gelatinase, leading to their exclusion. None produced biogenic amines. The remaining 130 were analyzed further. All grew at 30 °C and in 20% glucose, but only 101 grew at 37 °C. In 8% ethanol, 75 isolates grew, reduced to 63 when combined with sucrose. Despite most being safe, some isolates showed traits unsuitable for consumption or product quality. The results highlight their industrial potential but also indicate the need for optimization for growth at higher temperatures and ethanol concentrations.

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Toxicity and Stress Evaluation of Yeasts Isolated from Different Ecosystems for the Production of Single-Cell Proteins

  • 章节

  • 发表日期：

    2025年

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  • Sílvio Jackson Félix Alves,
  • Bárbara Côgo Venturim,
  • Luiza Souza Neubaner,
  • Juliana Rodrigues de Oliveira Gomes,
  • Guilherme Batista Rodrigues,
  • Marcela Aparecida da Silva Alexandre,
  • Luiz Felipe Vieira Queiroz,
  • Daniela Aparecida Mendonça,
  • Elizabeth Bárbara Epalanga Pires,
  • Tiago Nogueira de Santana,
  • José Guilherme Prado Martin,
  • Monique Renon Eller

摘要

Yeasts are ideal for SCP production due to their high protein content, lack of cholesterol, rapid growth, and minimal nutritional needs. This study evaluated 216 yeast isolates from Brazilian biomes, sugarcane, wine, and sourdough for SCP potential. The isolates were tested for hydrogen sulfide, biogenic amines, gelatinase production, and growth on YPD agar under stress conditions. Of the 216, 66 produced hydrogen sulfide and 20 produced gelatinase, leading to their exclusion. None produced biogenic amines. The remaining 130 were analyzed further. All grew at 30 °C and in 20% glucose, but only 101 grew at 37 °C. In 8% ethanol, 75 isolates grew, reduced to 63 when combined with sucrose. Despite most being safe, some isolates showed traits unsuitable for consumption or product quality. The results highlight their industrial potential but also indicate the need for optimization for growth at higher temperatures and ethanol concentrations.