title: Application of the freeze-dried bioluminescent bioreporter Pseudomonas putida mt-2 KG1206 to the biomonitoring of groundwater samples from monitoring wells near gasoline leakage sites.
abstract: This study examined the applicability of a freeze-dried bioluminescent bioreporter, Pseudomonas putida mt-2 KG1206 (called KG1206), to the biomonitoring of groundwater samples. Samples were collected from the monitoring wells of gas station tanks or old pipeline leakage sites in Korea. In general, the freeze-dried strain in the presence of pure inducer chemicals showed low bioluminescence activity and a different activity order compared with that of the subcultured strain. The effects of KNO3as a bioluminescence stimulant were observed on the pure inducers and groundwater samples. The stimulation rates varied according to the type of inducers and samples, ranging from 2.2 to 20.5 times (for pure inducers) and from 1.1 to 11 times (for groundwater samples) the total bioluminescence of the control. No considerable correlations were observed between the bioluminescence intensity of the freeze-dried strain and the inducer concentrations in the samples (R2< 0.1344). However, samples without a high methyl tertiary butyl ether (MTBE) level and those from the gas station leakage site showed reasonable correlations with the bioluminescence activity with R2values of 0.3551 and 0.4131, respectively. These results highlight the potential of using freeze-dried bioluminescent bacteria as a rapid, simple, and portable tool for the preliminary biomonitoring of specific pollutants at contaminated sites.
authors.affiliation: Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 34132, South Korea.
authors.forename: Kyung-Seok
authors.initials: KS
authors.lastname: Ko
authors.affiliation: Department of Environmental Engineering, Yeungnam University, Kyungbuk, 38541, South Korea. ickong@ynu.ac.kr.
authors.forename: In Chul
authors.initials: IC
authors.lastname: Kong
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D005742:Gasoline; D016958:Pseudomonas putida / Q000378:metabolism*; D014874:Water Pollutants, Chemical
chemical_list: D005742:Gasoline; D014874:Water Pollutants, Chemical
keywords: Bioluminescence; Bioreporter; Freeze-dried strain; Gasoline; Groundwater; Inducers