泥火山是台灣珍貴的地質地形,其中在台灣東部雷公火泥火山中,其前人的研究文獻之數量相當稀少,因此必須為此地區做菌種保留。 藉由化學分析部分,了解雷公火泥火山的地質環境、水質品質、陰離子和微量元素的含量,而分析結果顯示,此地區的為鹹性水質,其水質鹽度較高,提供了一個讓微生物成長的良好環境,主要的微生物族群,可能以嗜中性微生物為主,而此地區的砷含量偏高,其氯離子濃度也異常偏高。 藉由SRB培養基所培養的菌株,利用16S rRNA之基因序列,進行聚合酵素連鎖反應(PCR) 、膠電泳實驗以及DNA之定序動作,來初步確認雷公火泥火山所培養的菌株的品種,其中有成功培養出Vibrio furnissii (NCBI:KC884610)、Shewanella haliotis (NCBI:FN997635)、Pseudomonas oryzihabitans (NCBI:JX082200)之品種,接著進行菌種之生長速率與砷濃度的關係分析,確認菌種降低砷濃度的能力,並且藉由轉換砷之目標基因(arrA、arsB、arsC、aoxB),來證實菌種之生長速率與砷濃度的關係分析實驗,再利用最小抑菌濃度,來了解各個菌株容忍砷濃度的能力。
Mud volcano in Taiwan is valuable geological terrain. In this study I investigated the water chemistry and geomicrobiology for Lei-Gong-Huo volcano of eastern Taiwan. By chemical analysis for Lei-Gong-Huo mud volcano geological environment, water, anions and trace elements analysis showed that this region is alkaline water that contains higher salinity which might provide a suitable environment for microbial growth. Microbial analysis revealed that there are mainly microbial populations of neutrophilic microorganisms. Also there are high levels of arsenic in this region with unusually high concentration of chloride ions. The use of the 16S rRNA gene sequences showed that cultured species were Vibrio furnissii (NCBI: KC884610), Shewanella haliotis (NCBI: FN997635), Pseudomonas oryzihabitans (NCBI: JX082200) respectively. The bacterial growth in arsenic concentration analysis confirmed bacteria could reduce arsenic. Moreover, the target genes for converting arsenic were arsB which confirm the relationship between the concentration of arsenic and the bacterial growth. The minimum inhibitory concentration demonstrated the tolerate arsenic concentration capability of different strains.