| 研究生: |
胡竣翔 Hu, Jyun-Siang |
|---|---|
| 論文名稱: |
不同鏈黴菌株生產抗生活性物質能力之比較 The comparison of the ability of producing antibiotic compounds by different species of Streptomyces |
| 指導教授: |
高銘木
Kao, Ming-Muh |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 環境工程學系 Department of Environmental Engineering |
| 論文出版年: | 2007 |
| 畢業學年度: | 95 |
| 語文別: | 中文 |
| 論文頁數: | 120 |
| 中文關鍵詞: | 鏈黴菌屬 、吸收光譜 、透明圈 、醱酵培養 、分子生物技術 |
| 外文關鍵詞: | spectrum, clear zone, fermentation, molecular biology technique, Streptomyces |
| 相關次數: | 點閱:158 下載:8 |
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本研究針對澄清湖水庫底泥中進行放線菌的篩選,搭配分子生物技術鑑定菌株,希望能經由醱酵培養後產生具抑制效果之活性物質,並藉由UV-Vis光譜分析及透明圈表現來建立抗菌圖譜。
經分子生物技術鑑定從底泥中篩選出之菌種,其結果顯示,共篩選出7株放線菌,其中4株屬於Streptomyces屬,分別為菌種B23、B31、B32、B35,而只有B31經比對後為Streptomyces hosalacineus,其餘3株均比對出許多親緣關係較相近之菌種;而菌種B38與菌種B41,為放線菌中Nocardia的Rhodococcus屬;另1株菌種A3,則為Cellulosimicrobium cellulans。
最適萃取劑部份,以甲、乙醇作為醱酵液萃取劑之效果明顯優於乙酸乙酯。UV-Vis吸收光譜部份,選購之純菌其最大吸收波長約257-260nm,而自篩之鏈黴菌最大吸收波長約在254-264nm之間,且亦進一步發現不同醱酵培養天數為造成最大吸收波長不同之主要的影響因子之一。
拮抗活性表現方面,選購純菌之透明圈表現普遍較自篩菌為佳,而在自篩菌方面,其對E. coli所展現之透明圈最大、Fungi居次,Bacillus亦有不錯效果,故可推論經醱酵培養所產生之活性物質對於革蘭氏陰性菌及絲狀真菌之拮抗效果較佳,而在Yeast及Staphylococus部份,由透明圈的觀察結果可發現,無論是選購純菌或自篩菌,對其展現之拮抗性皆較其餘測試菌株為低,顯示其產生之拮抗效果相當有限。
關鍵字:鏈黴菌屬、分子生物技術、醱酵培養、吸收光譜、透明圈
This study mainly investigated molecular biology technique to identify Actinomycetes were isolated from sediment of the Cheng-Ching reservoir and estimated the effectiveness of inhibition of the active compounds-produced during fermentation process. Then, the analysis of UV spectrum was accomplished to observe the range of clear zones and establish the antibacterial spectrum.
The results of molecular biology technique showed that there are seven kinds of Actinomycetes were isolated from the sediment. After we contrasted with the database from NCBI website, we found that the B23, B31, B32, B35 could be identified as Streptomyces. The results showed B31 is classified to Streptomyces hosalacineus, and the others have closed-relationship from the phylogenetic tree. At last, B38 and B41 are identified as Rhodococcus of Nocardia and A3 is confirmed as Cellulosimicrobium cellulans.
In the experiments of proper extraction solvent, we found methanol or ethanol as extract during fermentation procedure were better than ethyl acetate. In the analysis of UV spectrum, the highest absorbance was observed at 257nm to 260nm and 254nm to 264nm of the pure cultures from BCRC and bacteria isolated from sediment, respectively. The results of fermentation indicated that different fermentation periods are one of the major factors to induce the variations of the highest absorbance.
The performance of clear zone with pure culture is better than bacteria isolated from sediment. The orders of clear zone range of test organisms were E. coli、Fungi and Bacillus. The inhibited effects from active compounds of Gram negative and mycelium fungus after fermentation were better than other test organisms. Regardless of pure culture from BCRC or bacteria isolated from sediment, the inhibited effects of Yeast and Staphylococus were both lower than others.
Key words:Streptomyces, molecular biology technique, fermentation, spectrum, clear zone
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