Biological Activities and Cultural Characteristics of an Entomogenous fungus, Paecilomyces tenuipes (Peck) Samson

눈꽃동충하초의 배양적 특성 및 생리활성

  • Ha, Nam-Gyu (Plant Environment Research Division, Gyeogsangnam-do agricultural Research & Extension Services) ;
  • Kim, Seung-Yul (Plant Environment Research Division, Gyeogsangnam-do agricultural Research & Extension Services) ;
  • Kang, Jin-Ho (College of Agriculture and Life Since, Gyeongsang National University) ;
  • Kang, Pil-Don (Department of Sericulture and Entomology, National Institute of Agricultural Science and Technology, R.D.A.) ;
  • Sung, Gyoo-Byung (Department of Sericulture and Entomology, National Institute of Agricultural Science and Technology, R.D.A.) ;
  • Hong, In-Pyo (Department of Sericulture and Entomology, National Institute of Agricultural Science and Technology, R.D.A.)
  • Published : 2005.06.01

Abstract

To develop technique for the production of P. tenuipes stromata on a large scale, the infection of P. tenuipes and the growth of stroma were investigated by silkworm (Bombyx mori) variety. Also, studied about biological activites of fruiting body formed on silkworm. Infection rate of the 5th instar larvae of the silkworm with P. tenuipes was the highest in Yangwonjam, followed by Hachojam, Baegokjam and Chilbojam in that order. Also, as the inoculation times was increased, infection rate tended to be raised. The rate of fruiting body formation of the silkworm pupae infected with P. tenuipes was the highest in Baegokjam, followed by Yangwonjam and Chilbojam in the order. But, actually the fruiting body formation of the 5th instar larvae of the silkworm tested was good in Chilbojam, followed by Yangwonjam and Baegokjam in that order in 3 times spraying inoculation. The fruiting bodies of Yangwonjam and Chilbojam infected with P. tenuipes had high amount of Mannitol, but Baegokjam and Hachojam had high concentration of Glucose on a dry weight basis. The mean content of total amino acid in the fruiting bodies of P. tenuipes was 1.03 ${\mu}mole/g$. The distribution rate of amino acid components decreased in the order of Arginine (12.2%)>Glycine (10.5%)> Proline (9.6)>Tyrosine (8.9%)>Serine>Leucine>Threonine. The most abundant amino acid in the fruiting bodies of the Baegokjam, Chilbojam and Hachojam infected with P. tenuipes was arginine, while Yangwonjam was Glycine. The most abundant fatty acid in P.tenuipes was Oleic acid on a dry weight basis. The unsaturated fatty acids such as Oleic acid, Linoleic acid and Linolenic acid accounted for more than 78% of the total fatty acids.

경제적 가치가 매우 높은 눈꽃동충하초를 안정적 대량 생산이 가능하도록 균의 배양적 특성과 누에 품종별 생리활성에 관한 연구를 수행한 결과를 요약하면 다음과 같다. 1. 눈꽃동충하초 감염률은 3회 분무 접종시 양원밤과 하초잠이 90% 이상으로 가장 높았으며, 칠보잠은 1회 접종시 71%에서 3회 접종시 88%로 접종 회수가 증가함에 따라 동충하초 감염률이 상승하는 경향을 나타내었다. 자실체 동충하초 감염률이 상승하는 경향을 나타내었다. 자실체 발생률은 3회 분무 접종시 칠보잠이 가장 양호하였으며, 양원잠, 백옥자 순이었다. 2. 눈꽃동충하초의 유리당 함량은 백옥잠과 하초잠에서는 Glucose 함량이 가장 높았으며, 칠보잠과 양원잠에서는 Mannitol 함량이 많았다. 3. 눈꽃동충하초에 함유된 아미노산의 총 평균 함량은 10.3 ${\mu}mole/g$이며, 백옥잠이 10.7 ${\mu}mole/g$로 가장 높았으며 하초잠과 칠보잠이 10.5 ${\mu}mole/g$, 양원잠이 0.96 ${\mu}mole/g$로 가장 낮은 함량을 나타내었다. 16종의 구성 아미노산 분포비율은 Arginine이 12.2%로 가장 높았으며, 다음으로 Glycine(10.5%) > Proline(9.6) > Tyrosine(8.9%) 순이었으며, Methionine이 2.1%로 가장 낮게 분포하였다. 4. 눈꽃동충하초의 유리 지방산 조성은 누에 품종에 관계없이 Oleic acid함량이 가장 높았으며, 다음이 Linolenic acid, Palmitic acid, Linoletic acid 순이었다.

Keywords

References

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