Isolation and Identification of Acebacter xylinum GS11 Producing Cellulose

Cellulose를 생산하는 Acetobacter xylinum GS11의 분리.동정

  • Published : 2000.06.01

Abstract

산업적으로 유용한 미생물 유래 셀룰로오스를 생산 이용하기 위해 전국 각지 양조식초의 덧으로부터 세룰로오스의 생산성이 높고 조질의 균일성을 나타내는 균주를 분리하였다 분리균 GS11은 gram 음성이고 간균(0.6$\times$2.2~3.2 $\mu\textrm{m}$)의형태를 하고 있으며 편모를 가지고 있어 운동성을 보였다. 또한 세포내 지방산 조성은 다량의 불포화 지방산 {{{{ {C}_{18:1} }}}}과 포화지반산 {{{{ {C}_{16:0 } }}}}, {{{{ {C}_{14:0 } }}}} 이 대부분을 차지하였고 DNA 염기조성 (G+C) 함량은 58.4% 이였으며 ubiqunone 은 {{{{ { Q}_{10 } }}}}을 갖는 것으로 나타났다 이러한 형태학적 생리.생화학적 특성의 결과에 따라 본 균주는 Acetobacter xylinum GS11으로 동정되었다 A. xylinum, GS11 의배양기간 동안 셀룰로오스 생산성을 검토하고자 250mL 삼각플라스크에 균주를 접종하여 $30^{\circ}C$에서 12일간 정치배양하였다 그결과 기질인 glucose의 소비는 접종 후 급소하게 감소하여 셀룰로오스 생산에 이용되었으며 셀룰오스의 생산은 배양 9일 경에 2.8g/l로 최대의 생산량을 나타냈다.

Keywords

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