Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Production of Hydroxymethylfurfrual by Sesamum indicum L. Root Cultures

참깨 뿌리배양에 의한 hydroxymethylfurfrual 생산

  • 천재안 (동아대학교 생명공학과) ;
  • 이진우 (동아대학교 생명공학과) ;
  • 이영병 (동아대학교 분자생명공학과) ;
  • 홍성식 (국립원예특작과학원) ;
  • 조강진 (국립농업과학원 기능성식품과) ;
  • 정정한 (동아대학교 생명공학과)
  • Published : 2009.12.30
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Abstract

Recently, hydroxymethylfurfrual (HMF) has been highlighted as a key intermediate for the production of liquid biofuels and other valuable compounds. We used sesame roots as a biocatalyst to synthesize HMF using flask cultures. The synthesis of HMF was identified by GC-mass analysis. The highest root growth was observed in cultures with 1.0 mg/l NAA at $30^{\circ}C$, while root growth was not found in those without NAA treatment. When silver nitrate ($AgNO_3$) was added, the root growth was greatest in those treated with 0.5 mg/l $AgNO_3$ and cultured at $30^{\circ}C$. In the case of HMF synthesis, its highest yield was obtained in those treated with 0.5 mg/l NAA at $25^{\circ}C$, but low HMF was detected in those treated without naphthaleneacetic acid (NAA). The addition of $AgNO_$ to the culture medium showed a 8-10% reduction in HMF yield compared to that of the control, indicating its inhibitory effect on the synthesis of HMF. On the whole, an optimal culture temperature for HMF synthesis seemed to be between $25-30^{\circ}C$.

참깨의 뿌리를 바이오촉매로 이용한 뿌리 배양을 통하여 HMF를 생산하기 위하여 뿌리의 생장과 HMF의 합성에 적합한 뿌리배양 조건을 탐색하였으며, 이를 위하여 NAA(naphthalene acetic acid), silver nitrate의 적정 농도조건 및 적정 배양온도 조건에 대한 실험이 수행되었다. 뿌리의 생장이 가장 높은 처리구는 $30^{\circ}C$에서 NAA의 농도가 1.0 mg/l로 첨가된 처리구에서 측정되었으며, 평균적으로 볼 때 두 배양 온도($25^{\circ}C$와 $30^{\circ}C$)간에는 뿌리의 생장차이는 측정되지 않았다. NAA가 첨가되지 않은 처리에서는 두 배양온도 모두에서 참깨의 뿌리생장이 전혀 생기지 않은 반면에, NAA가 첨가된 배양에서는 두 배양온도에서 뿌리의 생장이 확인되었다. 그리고 0.5 mg/l의 질산은이 첨가된 처리구에서 참깨의 뿌리생장이 가장 높게 측정되었으며, $25^{\circ}C$에서 배양된 처리구 보다는 $30^{\circ}C$에서 배양된 뿌리의 생장이 약간 높게 나타났고, 질산은의 농도가 0.5 mg/l 이상의 높은 농도에서는 뿌리의 생장이 오히려 감소되는 경향이 있었다. 그리고 HMF의 합성의 경우 가장 높게 측정된 처리구는 배양온도 $25^{\circ}C$에서 NAA 0.5 mg/l이 첨가된 처리구에서 측정된 반면에 NAA 무처리구에서는 HMF 합성이 측정되지 않았다. 질산은이 첨가된 처리구에서는 HMF의 합성이 오히려 억제되는 경향을 보여준 반면에 질산은의 무처리구에서 HMF의 합성이 가장 높은 결과가 나타났다. 질산은의 농도가 0.5, 1.0 및 1,5 mg/l로 처리된 구에서는 질산은 무처리구에 비해서 약 8-10% 정도의 HMF 합성이 감소되는 경향이 나타났으며, 두 배양 온도($25^{\circ}C$와 $30^{\circ}C$ 배양) 간에도 HMF의 합성에는 차이가 보이지 않았다.

Keywords

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