浙江农业学报 ›› 2017, Vol. 29 ›› Issue (11): 1903-1911.DOI: 10.3969/j.issn.1004-1524.2017.11.18

• 食品科学 • 上一篇    下一篇

黑木耳菌丝体液体发酵富硒条件优化及其多糖抗氧化活性

柴新义, 倪瓒鹏, 于士军, 张微微, 殷培峰   

  1. 滁州学院 生物与食品工程学院,安徽 滁州239000
  • 收稿日期:2017-05-10 出版日期:2017-11-20 发布日期:2017-12-05
  • 作者简介:柴新义(1978—),男,安徽萧县人,博士,副教授,研究方向为微生物资源与生物技术。E-mail:xinyianhui@163.com
  • 基金资助:
    安徽省教育厅自然科学研究重点资助项目(KJ2015A239)

Optimization of Se-rich liquid fermentation conditions and antioxidant activity of polysaccharide from Auricularia auricula mycelia

CHAI Xinyi, NI Zanpeng, YU Shijun, ZHANG Weiwei, YIN Peifeng   

  1. School of Biology and Food Engineering, Chuzhou University, Chuzhou 239000, China
  • Received:2017-05-10 Online:2017-11-20 Published:2017-12-05

摘要: 对黑木耳菌丝体液体发酵富硒条件及菌丝体多糖抗氧化活性进行了研究,旨在寻找新型富硒抗氧化物质并为其工业化生产提供参考资料。以黑木耳菌丝体的富硒量为测定指标,运用单因素和正交试验对黑木耳菌丝体液体发酵富硒条件进行优化,以DPPH(1,1-二苯基-2-苦基肼)自由基清除率为测定指标,采用DPPH还原法对黑木耳液体发酵菌丝体多糖的抗氧化活性进行初步研究。结果表明,黑木耳菌丝体液体发酵的最适富硒条件为:葡萄糖20 g·L-1,酵母膏2.5 g·L-1,硒浓度7.5 μg·mL-1,pH 6.5,温度28 ℃,转速140 r·min-1,培养时间5 d。该条件下黑木耳液体发酵的菌丝体富硒量可达853.16 μg·g-1,较优化前提高了66%。黑木耳菌丝体多糖对DPPH自由基的清除率达76.12%。优化后的培养条件较好地提升了黑木耳菌丝体液体发酵的富硒效果。

关键词: 黑木耳, 液体发酵, 富硒量, 多糖, 抗氧化活性

Abstract: The specific objectives of the study were to determine the optimal culture conditions of Se-accumulation and antioxidant activity of polysaccharide from Auricularia auricula mycelia in order to provide some references for liquid fermentation of Auricularia auricula and industrialization of its polysaccharide production. The single factor and orthogonal experiment was used to get the optimal culture conditions of Auricularia auricula by Se-accumulation of mycelia. The free radical scavenging activity of DPPH (1,1-phenyl-2-hydrazide) was used as the index to study the antioxidant activity of polysaccharide from Auricularia auricula mycelia. The results showed that the optimal culture conditions were as follows: glucose 20 g·L-1, yeast extract 2.5 g·L-1, selenium concentration 7.5 μg·mL-1, pH 6.5,temperature 28 ℃, rotational speed 140 r·min-1, and cultivation 5 d. Se-accumulation under the optimal culture conditions was 853.16 μg·g-1,which was 66% higher than that of the original conditions. The antioxidant activity of polysaccharide from Auricularia auricula mycelia in scavenging DPPH radical was 76.12%. Se-accumulation of Auricularia auricula was obviously improved with the optimal culture conditions.

Key words: Auricularia auricula, liquid fermentation, selenium accumulation, polysaccharide, antioxidant activity

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