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  • Authors: Nguyễn, Thị Tuyền; Đinh, Thúy Hằng (2009)

  • Fe(II)-oxydizing NO3--reducing bacteria in sediment samples collected from freshwater aquifer, flooded paddy soil and estuarine area were quantified and analysed on species composition. The MPN results showed that among the three studied environments, flooded paddy soil had the highest number of these bacteria (9.3 • 103.g-1), five and two times higher than that of freshwater aquifer and estuarine sediment, respectively. Based on distinguish colony characteristics, 12 strains of Fe(II)-oxidizing, NO3-- reducing bacteria were isolated from MPN series and were set into five genetically different groups as proposed by ARDRA analyses with two restricition enzymes HaeIII and MspI, showing relatively high diversity of this bacterial group in the studied environments. Analysing species com...