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국내산 사과로부터 분리된 Penicillium crustosum의 액상배지에서의 Patulin 생성능 평가

Patulin Producing Capacity in Broth Culture Media of Penicillium crustosum Isolated from Korean Apple

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참고문헌

주제분류식품과학

초록

국내산 사과로부터 분리, 동정한 P. crustosum과 patulin 생성균주인 P. griseofulvum(ATCC 46037)에 대하여 malt extract broth (MEB), sucrose yeast broth (SY) 및 5% glucose, yeast extract, peptone (5-GYEP) broth를 이용하여 생육정도와 독소 생성능을 비교하였다. 또한 균체 생육도와 독소 생성능과의 상관성을 검토하고, 배양액의 pH에 따른 균체생장과 patulin 생성능을 조사하였다. P. griseofulvum (ATCC 46037)의 균체성장은 SY배지에서 가장 높았으나 patulin은 SY, MEB, 5-GYEP 배지 모두에서 2,000-3,000 ppm의 높은 생산능을 보여주었다. P. crustosum의 균체생장 역시 SY배지에서 가장 높았으나 patulin 생성능은 5-GYEP broth에서 배양 3주에 2,794 ppm으로 가장 높게 나타났다. P. crustosum과 P. griseofulvum 모두 균체생장과 patulin 생산능과의 상관관계는 매우 낮은 것으로 나타났다. 배지의 pH에 따른 patulin 생산능은 P. griseofulvum은 경우 pH 3-11의 넓은 범위에서 patulin 생성능을 나타내었으나, P. crustosum은 pH 3-5의 산성조건에서 높은 patulin 생성능을 나타내었다. 탄소원에 따른 patulin 생산능은 P. griseofulvum은 glycerol에서, P. crustosum은 fructose에서 가장 높았다.

Abstract

The patulin producing capacity of Penicillium crustosum, an isolate from Korean apple, in various broth culture media, was investigated, and compared with patulin production by the standard strain P. griseofulvum (ATCC 46037). The maximal patulin production capacity of the P. griseofulvum ATCC 46037 was 2,029-2,829 ppm in 5-GYEP, SY and MEB broth media. The patulin-producing capacity of the isolated fungus (P. crustosum) attained 2,794 ppm in a 5-GYEP broth medium, but was only 324 and 11 ppm in SY and MEB media, respectively. There were no significant correlations between mycelial growth levels and patulin-producing ability in either P. crustosum or P. griseofulvum. The patulin production of P. griseofulvum was induced in the wide pH range of pH 3.0-11.0, while that of P. crustosum was induced in the acidic pH range pH 3.0-5.0. Patulin production levels were dependent on the carbon sources in the media and maximal patulin production by P. griseofulvum and P. crustosum was observed in media containing glycerol and fructose, respectively.

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