乳业科学与技术 ›› 2023, Vol. 46 ›› Issue (5): 1-9.DOI: 10.7506/rykxyjs1671-5187-20230920-047

• 基础研究 •    下一篇

一株植物乳杆菌的分离鉴定及其对红曲霉产红曲色素的影响

伍忠玲,高红艳,刘振民   

  1. 乳业生物技术国家重点实验室,上海乳业生物工程技术研究中心,光明乳业股份有限公司乳业研究院,上海 200436
  • 出版日期:2023-10-01 发布日期:2024-05-21
  • 基金资助:
    上海市国资委企业创新发展和能级提升项目(2022013)

Isolation and Identification of Lactobacillus plantarum and Its Effect on Pigment Production by Monascus

WU Zhongling, GAO Hongyan, LIU Zhenmin   

  1. Shanghai Engineering Research Center of Dairy Biotechnology, State Key Laboratory of Dairy Biotechnology, Dairy Research Institute, Bright Dairy and Food Co. Ltd., Shanghai 200436, China
  • Published:2023-10-01 Online:2024-05-21

摘要: 以红腐乳为原料分离到1 株乳酸菌菌株BD-1,研究BD-1菌株与BD-1菌株发酵上清液对紫色红曲霉(Monascus purpureus)ATCC 16365菌株产红曲色素(Monascus pigments,MPs)的影响。结果表明:通过革兰氏染色、生理生化和16S rRNA基因测序鉴定该BD-1菌株为植物乳杆菌(Lactobacillus plantarum);通过设置0.2%、0.4%、0.6%、0.8%、1.0%的BD-1菌株活菌接种量及ATCC 16365菌株培养0、24、48 h后接种BD-1菌株分析发现,相比于对照组,在ATCC 16365菌株培养24 h后加入0.6% BD-1菌株,胞外红曲色素(extracellular Monascus pigments,EMPs)色价及合成促进率显著提高,分别达(6.24±0.05) U/mL与(146.55±7.84)%,胞内红曲色素(intracellular Monascus pigments,IMPs)色价及合成促进率显著提高,分别达(288.14±6.82) U/g与(16.07±0.30)%;此外,相比于对照组,BD-1菌株发酵上清液加入ATCC 16365菌株培养,EMPs色价及合成促进率显著提高,分别达(4.20±0.08) U/mL与(29.85±5.40)%。综上,0.6% BD-1菌株活菌接种量为产MPs的最佳接种量。

关键词: 乳酸菌分离;植物乳杆菌;红曲霉;红曲色素

Abstract: A lactic acid bacteria (LAB) strain BD-1 was isolated from red fermented bean curd, and the effect of BD-1 and its fermentation supernatant on the production of Monascus pigments (MPs) by Monascus purpureus ATCC 16365 was studied. The results showed that BD-1 was identified as Lactobacillus plantarum through Gram staining, physiological and biochemical profiles and 16S rRNA gene sequencing. Five different inoculum sizes of 0.2%, 0.4%, 0.6%, 0.8% and 1.0% were tested for strain BD-1 and ATCC 16365 was cultured for 0, 24 or 48 h. It was found that adding 0.6% BD-1 to the fermented medium with ATCC 16365 after culture for 24 h markedly increased the color value and synthesis of extracellular Monascus pigments (EMPs) and intracellular Monascus pigments (IMPs). Under this condition, the color values of EMPs and IMPs were (6.24 ± 0.05) and (288.14 ± 6.82) U/mL, and their synthesis was increased by (146.55 ± 7.84)% and (16.07 ± 0.30)% compared with the control group, respectively. In addition, adding the fermentation supernatant of BD-1 to ATCC 16365 also remarkably increased the color value and synthesis of EMPs, which were increased to 4.20 U/mL and by (29.85 ± 5.40) % compared to the control group, respectively. In summary, the optimal inoculum size of BD-1 for MPs production was 0.6%.

Key words: isolation of lactic acid bacteria; Lactobacillus plantarum; Monascus; Monascus pigments

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