河南农业科学 ›› 2022, Vol. 51 ›› Issue (3): 118-126.DOI: 10.15933/j.cnki.1004-3268.2022.03.014

• 园艺 • 上一篇    下一篇

杏鲍菇液体菌种的细胞固定化技术及其保藏条件研究

周婷婷1,2,周荣翔1,张瑶1,陈文才3,李霁虹1,马桂珍1   

  1. (1.江苏海洋大学,江苏 连云港 222005;2.南京医科大学康达学院,江苏 连云港 222000;3.河北永清县农业农村局种植业技术推广站,河北 永清 065600)
  • 收稿日期:2021-08-03 出版日期:2022-03-15 发布日期:2022-05-23
  • 通讯作者: 马桂珍(1963-),女,河北唐山人,教授,博士,主要从事有益微生物开发与利用研究。E-mail:guizhenma@sohu.com
  • 作者简介:周婷婷(1989-),女,江苏连云港人,在读硕士研究生,研究方向:食用菌液体菌种制备与栽培技术。E-mail:tingzhou7@njmu.edu.cn
  • 基金资助:
    江苏省苏北科技专项(LYG-SZ201912);江苏省研究生实践创新计划项目(SJCX20_1298)

Study on Cell Immobilization Technology and Storage Conditions of Liquid Strains of Pleurotus eryngii

ZHOU Tingting1,2,ZHOU Rongxiang1,ZHANG Yao1,CHEN Wencai3,LI Jihong1,MA Guizhen1   

  1. (1.Jiangsu Ocean University,Lianyungang 222005,China;2.Kangda College of Nanjing Medical University,Lianyungang 222000,China)
  • Received:2021-08-03 Published:2022-03-15 Online:2022-05-23

摘要: 为解决杏鲍菇液体菌种不耐储存和不易运输等问题,通过筛选适宜的固定化载体种类及其质量浓度,分析液体菌种与固定化载体体积比、CaCl2质量浓度、交联时间等对固定化小球形成的影响,优化固定化条件,研究杏鲍菇液体菌种细胞固定化技术;通过测定不同温度条件下保藏不同时间固定化菌种的成活率、菌丝生长速度、呼吸强度、纤维素酶活性等,明确固定化菌种的生物活性和保藏稳定性。结果表明,杏鲍菇液体菌种的细胞固定化最佳条件为:将海藻酸钠与聚乙烯醇(质量比3∶7)作为固定化载体,固定化载体质量浓度为80 g/L,液体菌种与固定化载体溶液体积比5∶5,CaCl2质量浓度为20 g/L,交联时间6 h,制得的固定化菌种球形规则,传质性快,为15 min,机械强度适中,为60.1 g,菌丝增长率高达200.1%。固定化菌种在20、4℃条件下保藏30 d,随着保藏时间增加,成活率和菌丝生长速度无显著性变化,呼吸强度降低,纤维素酶活性升高,说明菌种仍具有较高的生物活性,利于固定化菌种生物活性稳定;-20℃保藏10 d成活率和菌丝生长速度分别降低50个百分点和72.73%,呼吸强度和纤维素酶活性显著降低,菌种生物活性降低,不利于菌种的保藏。

关键词: 杏鲍菇, 液体菌种, 固定化, 菌种保藏, 呼吸强度

Abstract: In order to solve the shortcomings of the liquid strains of Pleurotus eryngii that are not easy to be stored and transported,the immobilization technology of Pleurotus eryngii liquid strain cells was studied by screening suitable immobilization carrier types and their mass concentrations,determining the effects of the volume ratio of liquid strain to carrier,the mass concentration of CaCl2,and the crosslinking time on the formation of immobilized beads,and optimizing the immobilization conditions.The biological activity and storage stability of immobilized strains were determined by measuring the survival rate,mycelium growth rate,respiratory intensity and cellulase activity of immobilized strains stored at different temperatures for different time. The results showed that the immobilization conditions of Pleurotus eryngii liquid spawn were as follows:the mass ratio of sodium alginate to polyvinyl alcohol was 3∶7 as carrier,the mass concentration of carrier was 80 g/L,the volume ratio of liquid spawn to immobilization carrier solution was 5∶5,the mass concentration of CaCl2 was 20 g/L,and the crosslinking time was 6 h.The immobilized strain was produced with regular spherical shape and fast mass transferability of 15 min,the mechanical strength was 60.1 g,and the mycelial growth rate was 200.1%.The survival rate and mycelial growth rate of the immobilized strains did not change significantly after 30 days of storage at 20℃ or 4℃,but the respiratory intensity decreased and the cellulase activity increased,which indicated that the immobilized strains still had high biological activity and it was conducive to the stability of the biological activity of the immobilized strains. The survival rate and growth rate decreased by 50 percentage points and 72.73%,respectively,after 10 days of storage at -20℃.Under this condition,the respiration intensity and cellulase activity were significantly reduced,and the biological activity of the strain was reduced,which was not conducive to the preservation of the strain.


Key words: Pleurotus eryngii, Liquid strain, Immobilization, Strain storage, Respiration intensity

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