Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Characteristics of Cadmium Accumulating Mutant, Pseudomonas maltophilia H-8M

카드뮴 축적 변이주인 Pseudomonas maltophilia H-8M의 특성

  • Ryu, Beung-Ho (Dept. of Food Science and Technology, Kyungsung University) ;
  • Rho, Myung-Hoon (Dept. of Food Science and Technology, Kyungsung University) ;
  • Jung, Su-Ja (Dept. of Food and Nutrition, Pusan Woman's Junior College) ;
  • Bae, Ki-Chul (Institute of Pusan Public Health and Environment)
  • 류병호 (경성대학교 식품공학과) ;
  • 노명훈 (경성대학교 식품공학과) ;
  • 정수자 (부산여자전문대학 식품영양과) ;
  • 배기철 (부산시 보건환경연구원)
  • Published : 1992.03.01
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Abstract

This study was carried out to investigate the characteristics of a mutant, Pseudomonas maltophilia H-8M selected with the treatment of Pseudomonas maltophilia H-8 by N-methyl-N-nitro-N-nitrosoguanidine(MNNG). This mutant showed highest ability of cadmium accumulation. The growth rate of Pseudomonas maltophilia H-8M showed about 80% in 1000ppm Cd containing medium when compare with control for 36h at $30^{\circ}C$. Pseudomonas maltophilia H-8M not inhibited on the growth in addition of various heavy metal such as $Hg^{2+}$, $Zn^{2+}$, $Pb^{2+}$, $Cu^{2+}$, $Cr^{2+}$ and $Co^{2+}$, but inhibited in $Sn^{2+}$ containing medium, respectively. Pseudomonas maltophilia H-8M was accumulated the highest cadmium level of 62.3% on whole cell in the medium containing 50 ppm and 80% of accumulated cadmium was distributed in the cell wall.

본 연구는 cadmium의 축적균주인 Pseudomonas maltophilia H-8을 MNNG로 처리하여 cadmium축적능이 가장 우수한 변이균주인 Pseudomonas maltophilia H-8M을 얻었고 그 특성을 조사하였다. 변이주 Pseudomonas maltophilia H-8M은 카드뮴농도 1,000ppm에서 36시간 배양했을 시 대조구에 비해 약 80%정도의 성장률을 나타내었다. 카드뮴 이외의 중금속의 첨가에 따른 생육상은 $Pb^{2+}$, $Zn^{2+}$, $Hg^{2+}$, $Cu^{2+}$, $Cr^{2+}$, $Co^{2+}$ 등에는 별다른 성장 억제는 없었으나 $Sn^{2+}$에서는 생육억제가 나타났다. 또한 50ppm의 카드뮴을 배지에 첨가 하였을 때 균체내 카드뮴 축적율은 52.92%로 가장 높게 나타났으며 축적부위는 세포벽에 80.3%의 축적율을 나타내었다.

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