Environment Department, Public Works Research Institute, Ministry of Construction, Ohaza-Asahi 1, Tsukuba, Ibaraki 305, Japan.
Seasonal changes in ribosomal RNA of sulfate-reducing bacteria and sulfate reducing activity in a freshwater lake sediment
Article first published online: 17 JAN 2006
FEMS Microbiology Ecology
Volume 28, Issue 1, pages 31–39, January 1999
How to Cite
Li, J.-h., Purdy, K. J., Takii, S. and Hayashi, H. (1999), Seasonal changes in ribosomal RNA of sulfate-reducing bacteria and sulfate reducing activity in a freshwater lake sediment. FEMS Microbiology Ecology, 28: 31–39. doi: 10.1111/j.1574-6941.1999.tb00558.x
- Issue published online: 17 JAN 2006
- Article first published online: 17 JAN 2006
- Received 6 May 1998, Revised ******, Accepted 1 September 1998
- Freshwater lake;
- Sulfate reduction rate;
- Sulfate-reducing bacterium;
- Oligonucleotide probe;
- Population dynamics
Seasonal changes in the population of sulfate-reducing bacteria (SRB) in the profundal sediments of a freshwater lake, Lake Kizaki, Japan, were directly determined using oligonucleotide probes complementary to the 16S ribosomal RNA of the major phylogenetic groups of SRB. The results based on the hybridization indicated that relative 16S rRNA abundance (RNA index) of Bacteria and Gram-negative mesophilic SRB detected by probes EUB 338 and SRB 385 with respect to all known organisms as detected by probe UNIV 1400 in surface sediments (0–6 cm) were 71% and 4.1% on average for 15 months, respectively. The RNA indexes of the major SRB genera to all bacteria in the 0–3-cm and 3–6-cm layers, on average, were 1.4% for Desulfobulbus, 0.6% for Desulfobacterium, and 0.5% for Desulfovibrio. The RNA indexes of Desulfobulbus showed relatively high values in those of detected SRB during almost all of the study periods, while Desulfobacterium and Desulfovibrio exhibited low relative abundance. The RNA index of Desulfobulbus correlated with the rate of sulfate reduction in the sediment. Therefore, Desulfobulbus appears to be dominant in the active SRB population in the surface sediment.