Abstract
This study was attempted to observe the effect of crude ginseng saponin on the cell growth, lipid contents of Rhodotolula glutinis cells and fatty acid composition of the lipids from the yeast. The results obtained were as follows; The weight of dry yeast cells was increased by the addition of ginseng saponin and was noticeably increased in the treatment containing 10$^{-2}$ ％ ginseng saponin. With the increase of ginseng saponin concentration, lipids contents in Rhodotorula glutinis were increased but it's contents were decreased at the concentration of 10$^{-1}$ ％ ginseng saponin. The crude lipids of Rhodotorula glutinis were identified to be composed of palmitic, stearic, oleic, linoleic acid. Un-saturated fatty acid contents were greater than those of saturated fatty acids. Fatty acid contents were increased in the order of oleic, linoleic, palmitic and stearic acid, but palmitic acid was increased more than linoleic acid in the lipids of cells obtained at the higher than 10$^{-2}$ ％ ginseng saponin. As the ginseng saponin concentration was increased fatty acid contents were also increased, while they were considerably decreased in case of the addition of 10$^{-1}$ ％ ginseng saponin concentration.
인삼 Saponin의 첨가가 효모균체 증식과 균체 지방함량 및 지방산조성에 미치는 영향을 구명하기 위하여 기본배지에 인삼의 crude saponin을 각각 0 % (control) $10^{-4}$ %, $10^{-3}$%, $10^{-2}$ %, $10^{-1}$% 되게 넣고 Rhodotorula glutinis를 접종하여 8 일간 진탕배양한 후 효모의 수율 및 지방산 조성을 비교 조사하였다. 1) 균체수율은 인삼 Saponin로 증가하였으며 $10^{-2}$ % 첨가구 8.45mg/$m\ell$로 가장 높았다. 2) 인삼 Saponin 농도가 증가함에 따라 인삼 Saponin 처리구의 균체지질함량은 $10^{-1}$% 첨가구를 제외한 모든 처리구에서 대조구보다 증가하였으며 그중 $10^{-2}$ % 첨가구에서 49.8%로 가장 많았다. 3) Rhodotorula glutinis의 균체지방산은 Palmitic acid. stearic acid, oleic acid, linoleic acid, linolenic acid 등이었으며, 불포화지방산 함양이 포화지방산 함양보다 많았다. 4) 인삼 Saponin 농도에 관계없이 각 처리구의 지방산 함양은 oleic＞linoleic＞linolenic＞palmitic＞stearic acid 순으로 많았으며, Saponin 농도 $10^{-2}$ % 이상의 농도에서는 palmitic acid가 linolenic acid 보다 증가하였다. 5) 인삼 Saponin 농도가 증가함에 따라 각 처리구 균체지방산 함량은 증가하였으며, 그중 $10^{-2}$ % 및 $10^{-3}$% 첨가구에서 가장 많았으나 $10^{-1}$ 첨가구에서는 현저하게 감소하였다.