Producton of Yeast Spores from Rice Wine Cake.

주박으로부터 효모포자의 생산

  • Im, Yong-Sung (Department of Bioscience and Biotechnology, The University of Suwon) ;
  • Bae, Sang-Myeon (KookSoonDang Co., Ltd.) ;
  • Kim, Geun (Department of Bioscience and Biotechnology, The University of Suwon)
  • Published : 2004.06.01

Abstract

Rice wine cake (RWC) is the solid waste obtained after rice wine fermentation. For the mass production of the spores of yeast Saccharomyces from RWC, the optimum pretreatment condition of RWC, the optimum composition of culture medium, and the optimum culture condition were examined. For sporulation, yeast cells were grown in the pre sporulation medium (PSM), transferred into sporulation medium (SM) containing 1 % potassium acetate, and incubated in a rotary shaking incubator at $25^{\circ}C$ for 4 days. The supernatant of the mixture of RWC and water was used as the presporulation medium (PSM). The optimum temperature and time for the pre-incubation of the mixture of RWC and water (1:2) to obtain maximum sporulation yield were $V^{\circ}C$ and 24 hr, respectively, and optimum culture time in PSM was 48 hr. Using these optimum conditions, the asci number obtained was 0.72$ 1.06${\times}$10^{8}$$m\ell$. The addition of wheat coat koji into SM increased the final number of asci to beTEX>$10^{8}$ $m\ell$. Spores were formed in the SM with the initial pH of 7-11, but no spores were formed in the SM with the initial pH of 5. To save the time and effort to pretreat the RWC, 2% and 0.5% RWC without any pretreatment were directly added into PSM containing 1 % brown sugar and SM, respectively, and the maximum asci number of $1.27${\times}$10^{8}$ /$m\ell$ was obtained.

쌀 양조 후 남은 고체찌꺼기인 주박을 사용하여 Saccharomyces 효모 포자의 대량생산을 위하여 주박의 최적 전 처리과정, 최적 배지조성과 배양조건을 조사하였다. 포자형성을 위하여서는 주박으로 제조한 전포자형성배지(PSM)에서 효모를 배양한 추 1% potassium acetate로 구성된 포자형성배지(SM)에 10%를 재접종한 후 $25^{\circ}C$에서 4일간 포자형성을 시켰다. 주박과 물을 1:2 로 혼합한 후 $51^{\circ}C$에서 24시간 preincubation한 후 그 원심분리 상등액을 PSM으로 사용하여 48시간 배양하고 이를 다시 SM에 접종하여 4일 배양하였을 때 최대 포자 자낭 수 $0.72${\times}$10^{8}$ $m\ell$ 를 얻었다. SM배지에 1.4% 밀기울 국(koji)을 영양원으로 첨가하였을 때 형성된 자낭수는 $1.06${\times}$10^{8}$$m\ell$ 증가하였다 초기 SM pH가 5에서는 포자가 형성되지 않았으며, pH 7∼11에서 포자가 형성되었다. 한편 주박의 전 처리에 소요되는 시간과 노력을 절감하기 위하여, 전 처리 하지 않은 주박을 직접 사용하여 포자형성을 시켜보았는데, 1% 갈색설탕을 함유하는 PSM에 2% 그리고 SM에 0.5%의 전 처리 하지 않은 주박을 각각 첨가하였을 때, 최대 포자 자낭수 $1.27${\times}$10^{ 8}$ $m\ell$를 얻었다.

Keywords

References

  1. Methods Enzymol v.1 Amylases α and β Bernfeld, P.
  2. Appl. Environ. Micobiol. v.61 Factors which affect the frequency of sporulation and tetrad formation in Saccharomyces cerevisiae Bakers yeast Codon, A. C.;J. M. Gasint-Rairez;T. Benitez
  3. Can. J. Microbiol. v.42 A comparative study on the conditions of growth and sporulation of three strains of Clostridium perfringens type A. Decaudin M.;J. L. Tholozan https://doi.org/10.1139/m96-044
  4. J. Bacteriol. v.100 Acetate utilization and macromolecular synthesis during sporulation of yeast Esposito, M. S.;R.E. Esposito;M. Arnaud;H. O. Halvorson
  5. J. Bacteriol. v.116 Sporulation synchrony of Sacchromyces cerevisiae grown in various carbon sources Fast D.
  6. The yeasts v.Ⅰ Sporulation and hybridization of yeasts Fowell, R. R.;A. H. Rose(ed.);J. S. Harrison(ed.)
  7. J. Bacteriol. v.149 Initiation of yeast sporulation by partial carbon, nitrogen or phosphate deprivation Freese, E. B.;M. I. Chu;E. Freese
  8. FEMS Microbiol. Rev. v.32 Catabolite repression mutants of yeast Gancedo, J. M.;C. Gancedo
  9. Arch. Biochem. Biophy. v.63 Loss of cell constituents on reconstruction of active dry yeast Herrera, T.;W. H. Peterson;E. J. Cooper;H. J. Peppler https://doi.org/10.1016/0003-9861(56)90017-0
  10. Kor. J. Biotechnol. Bioeng. v.14 Yeast cell cultivation to produce active dry yeast with improved viability Kim, K.;J. Y. Kim
  11. The yeasts v.3 Sporulation in Saccharomyces cerevisiae Miller, J. J.;A. H. Rose(ed.);J. S. Harrison(ed.)
  12. Crit. Rev. Biotechnol. v.13 Use of microbial spores as a biocatalyst Murata, K. https://doi.org/10.3109/07388559309041318
  13. Yeast v.14 Bicarbonate-mediated social communication stimulates meiosis and sporulation of Saccharomyces cerevisiae Ohkuni, K.;M. Hayashi;I. Yamashita https://doi.org/10.1002/(SICI)1097-0061(199805)14:7<623::AID-YEA264>3.0.CO;2-D
  14. Curr. Genet. v.23 Mitochondrial activity is required for the expression of IME1, a regulator of meiosis in yeast Treinin, M.;G. Simchen https://doi.org/10.1007/BF00351500
  15. J. Ferment. Bioeng. v.75 Resistance of yeast and bacterial spores to high voltage electric pulses Yonemoto, Y.;T. Yamashita;M. Muraji;W. Tatebe https://doi.org/10.1016/0922-338X(93)90217-V