Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Isolation and Application of Phytate-Hydrolysing Lactic Acid Bacteria.

Phytate 분해 유산균의 분리 및 이용

  • Published : 2001.12.01
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Abstract

Among lactic acid bacteria isolated from young animal feces, a bacterium having high phytate degradation ability, identified as L. paracasei subsp. paracasei, was selected. When inoculated into soybean meal, wheat bran and rice bran, the bacterium showed phosphate group of phytate (phytate-P) degrad- ability of 27.07% for soybean meal and 12.18% for wheat bran. However, degradation of phytate-P was not observed for rice bran L. paracasei subsp, paracasei had good acid and bile juice tolerance, having 9.70, 9.66 and 8.80 (log CFU/ml) for control, acid and bile juice treatment. Feed efficiency increased from 3.71 to 3.21 with addi- tion of the bacterium at 0.4% (w/w) level in swine fattener\`s diets.

본 연구는 단위 가축 사료로 이용되는 곡류 등에 존재하는 항연인자인 Phytate 함유 환경하에서의 성장 및 phytate 분해력이 우수한 유산균을 분리하고 발효사료 제조 및 가축 생균제용 균주로의 이용성을 검토하기 위하여 실시하였다. 분리 유산균은 자돈 분변으로부터 얻은 유산균들중 phytate 함유 환경하에서의 성장 및 phytate 분해력이 가장 우수한 균으로 동정결과Lactobacillus paracasei subsp, paracasei로 동정되었다. 분리 규주는 내산성, 내담증섭이 높고, 사료원료를 배지성분으로 하여 순수배양한 결과 대두박 및 밀기울의 phytate-P 분해율이 각각 27.07및 12.18%로 나타났다. 또한 분리 균주를 비육돈 사료에 첨가하여 급여한 결과 중체량 개선효과는 나타나지 않았으나 사료효율 개선효과를 얻을 수 있었다.

Keywords

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