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Culture conditions of liquid spawn and the growth characteristics of Pleurotus ostreatus

느타리버섯의 액체종균 배양 조건과 생육 특성

  • Lee, Soo-Jung (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Kim, Hun-Hwan (Department of Food Science and Nutrition, Gyeongsang National University) ;
  • Kim, Seon-Ho (Guydam mushroom Co., Ltd.) ;
  • Kim, In-Soo (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Sung, Nak-Ju (Department of Food Science and Nutrition, Gyeongsang National University)
  • 이수정 (경상대학교 농업생명과학연구원) ;
  • 김훈환 (경상대학교 식품영양학과) ;
  • 김선호 ((주)귀담버섯) ;
  • 김인수 (경상대학교 농업생명과학연구원) ;
  • 성낙주 (경상대학교 식품영양학과)
  • Received : 2018.08.29
  • Accepted : 2018.09.19
  • Published : 2018.09.30

Abstract

To improve the productivity of Pleurotus ostreatus, different conditions of liquid spawn culture were tested. The optimum culture conditions were potato dextrose broth, incubation temperature of $22^{\circ}C$, and pH 6. Fifteen different media ('A' to 'O') containing 0.3% soybean meal (SM) were prepared by varying sugar and glucose contents. The cultures were propagated in SM media for 14 days, at $22^{\circ}C$, and pH 6. Their absorbances were higher after 14 days of incubation in the media containing both sugar and glucose. In particular, the absorbance of media containing 5 to 20% of glucose alone ('C', 'D', 'E', and 'F') tended to increase in the incubation period. Dry cell weight was lower in media containing less than 20% sugar or glucose alone than in media containing 30% sugar ('A') or 30% glucose ('B') alone. In sawdust media, in 900 mL-bottle, the optimum inoculation volume of liquid spawn was 15 to 20 mL. The texture of the mushroom cultivated with the liquid spawn was superior to that cultivated in the solid spawn.

느타리버섯의 생산성 향상을 위하여 액체종균 배양액의 조건을 설정하고자 하였다. Potato dextrose 배양액에서 균체 생장을 위한 최적 pH는 6이었다. 대두박 0.3%와 설탕 및 포도당 함량을 달리한 15가지의 배양액('A'~'O')은 $22^{\circ}C$ 및 pH 6의 조건에서 14일동안 배양되었을 때 설탕과 포도당이 각각 함유된 배양액에서 흡광도는 증가되었다. 특히 5~20%의 포도당만 함유된 배양액('C', 'D', E' 및 'F')은 배양기간의 경과에 따라 흡광도가 증가되는 경향이었다. 배양액의 건조 균체량은 20%이하의 설탕이나 포도당이 단독으로 함유된 배양액에서 감소되었으나, 30%의 설탕('A') 또는 포도당 ('B')이 각각 함유된 배양액에서 건조 균체량은 증가되었다. 1100 mL의 톱밥배지 병재배 시 액체종균의 최적 접종량은 15~20 mL이었다. 고체종균 및 액체종균으로 느타리버섯을 재배하여 조직감을 비교한 결과 고체종균에 비해 액체종균으로 재배된 버섯에서 우수한 경향이었다.

Keywords

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