Journal
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
Volume 27, Issue 7, Pages 1316-1323Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
DOI: 10.4014/jmb.1702.02069
Keywords
Geosmin; 2-methylisoborneol; chemostat; cyanobacteria; Anabaena; Planktothrix
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Funding
- R&D Program and the Basic Core Technology Development Program for the Oceans
- Polar Regions of the National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning [2014M3C8A4030437, 2016M1A5A1027453]
- KRIBB Research Initiative Program
- National Research Foundation of Korea [2016M1A5A1027453, 2014M3C8A4030437] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Geosmin and 2-methylisoborneol 2-MIB), responsible for earthy or musty smell, are a major concern for safe drinking water supplies. This study investigated the effects of environmental factors on odorous compound production and cell growth in cyanobacterial strains. Anabaena sp. FACHB-1384, a 2-MIB producer, was sensitive to low temperature (<20 degrees C). However, geosmin producers, Anabaena sp. Chusori and Anabaena sp. NIER, were sensitive to high light intensity (>100 mu mol/m(2)/sec), but not to low temperature. Geosmin concentrations increased under higher nitrate concentrations, being linearly proportional to cell density. A P-limited chemostat showed that P-stress decreased the geosmin productivity and extracellular geosmin amount per cell in Anabaena sp. NIER. However, only 2-MIB productivity was reduced in Planktothrix sp. FACHB-1374 under P-limitation. The extracellular 2-MIB amount per cell remained constant at all dilution rates. In conclusion, high light intensity and P-stress can contribute to the lower incidence of geosmin, whereas 2-MIB reduction could be attainable at a lower temperature.
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