Effects of light and temperature on the odor production of 2-methylisoborneol-producing Pseudanabaena sp. and geosmin-producing Anabaena ucrainica (cyanobacteria) |
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| Institution: | 1. Key Laboratory of Plant Germplasm Enhancement and Speciality Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China;2. Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;1. Aquatic Production Systems, Natural Resources Institute Finland (Luke), Survontie 9A, FI-40500 Jyväskylä, Finland;2. University of Jyväskylä, Department of Biological and Environmental Science, Box 35, FI-40014 University of Jyväskylä, Finland;3. University of Eastern Finland, Department of Environmental and Biological Sciences, P.O. Box 1627, FI-70211 Kuopio, Finland;1. Key Laboratory of Algal Biology, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, People’s Republic of China;2. University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China;3. Tianjin Hydraulic Research Institute, Tianjin 300061, People’s Republic of China;4. College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, People’s Republic of China;1. Environment and Climate Change Canada, Canada Centre for Inland Waters, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada;2. Healthscope Pathology, 1 Goodwood Road, Wayville, SA 5034, Australia;3. South Australian Water Corporation, 250 Victoria Square, Adelaide, SA 5000, Australia |
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| Abstract: | Frequent off-flavor events caused by geosmin and 2-methylisoborneol (MIB) have attracted research on the main producers, cyanobacteria. This study evaluated the effects of light and temperature on the odor production of MIB-producing Pseudanabaena sp. Lauterborn and geosmin-producing Anabaena ucrainica (Schhorb.) Watanabe. The maximum MIB production and lowest growth rate (indicated by the chlorophyll a (Chl a)) were observed at 35 °C compared with that at 10 °C and 25 °C. Cultures grown under a light intensity of 60 μmol photons m?2 s?1 demonstrated the highest MIB production and minimum growth rate, whereas the minimum MIB production and maximum growth rate were obtained under 10 μmol photons m?2 s?1. Similar patterns were observed for geosmin production. A. ucrainica had the highest geosmin production and lowest Chl a concentration under 10 °C and 60 μmol photons m?2 s?1. Moreover, greater proportions of geosmin and MIB were released into extracellular under growth-inhibiting temperatures and light intensities. An inverse correlation between odor production and the cell growth rate was suggested, and this relationship may reflect the competition for substrates of odor and Chl a synthesis. Thus, the accumulation of geosmin and MIB was probably the result of decreased cellular metabolic activity in cyanobacteria. |
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| Keywords: | Geosmin MIB Light Temperature Cyanobacteria |
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