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<p><i>Β</i>-phenylethanol, also known as 2-phenylethanol (2-PE), is a valuable higher alcohol highly sought after by the perfumery, cosmetics, and food industries. Microbial production of 2-PE is a promising alternative that heavily depends on the types of strains. <i>Pichia kudriavzevii</i> YJQ-1, isolated from jiuqu of Guangdong rice-flavor baijiu, exhibits robustness under 4&#xa0;g/L 2-PE or 8% (v/v) ethanol stress and has the ability to produce 2-PE under different carbon sources via the Ehrlich pathway. The production condition of <i>Pichia kudriavzevii</i> YJQ-1 for 2-PE was optimized, and results indicated that the optimal condition for 2-PE production is with 90&#xa0;g/L glucose, 1&#xa0;g/L yeast extract, 1% (w/v) P2 biochar, 42&#xa0;g/L Triton X-100 and 12&#xa0;g/L L-phenylalanine (L-phe), at a loading volume of 50&#xa0;mL/250&#xa0;mL, a rotation speed of 200&#xa0;rpm, a temperature of 30&#xa0;°C, and with 2% inoculation. Finally, 4.81&#xa0;g/L 2-PE with a yield of 0.72&#xa0;g/g L-phe was achieved through batch fermentation, suggesting that <i>Pichia kudriavzevii</i> YJQ-1 is a potential candidate producer of 2-PE.</p>

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Investigation of β-phenylethanol production by a wild-type Pichia kudriavzevii isolated from jiuqu of rice-flavor baijiu

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Chunyun Qu,
  • Maoxiu Tian,
  • Ziyi Cai,
  • Yiyin Xu,
  • Yu Zeng,
  • Weidong Bai,
  • Gongliang Liu

摘要

Β-phenylethanol, also known as 2-phenylethanol (2-PE), is a valuable higher alcohol highly sought after by the perfumery, cosmetics, and food industries. Microbial production of 2-PE is a promising alternative that heavily depends on the types of strains. Pichia kudriavzevii YJQ-1, isolated from jiuqu of Guangdong rice-flavor baijiu, exhibits robustness under 4 g/L 2-PE or 8% (v/v) ethanol stress and has the ability to produce 2-PE under different carbon sources via the Ehrlich pathway. The production condition of Pichia kudriavzevii YJQ-1 for 2-PE was optimized, and results indicated that the optimal condition for 2-PE production is with 90 g/L glucose, 1 g/L yeast extract, 1% (w/v) P2 biochar, 42 g/L Triton X-100 and 12 g/L L-phenylalanine (L-phe), at a loading volume of 50 mL/250 mL, a rotation speed of 200 rpm, a temperature of 30 °C, and with 2% inoculation. Finally, 4.81 g/L 2-PE with a yield of 0.72 g/g L-phe was achieved through batch fermentation, suggesting that Pichia kudriavzevii YJQ-1 is a potential candidate producer of 2-PE.