Effects of freshwater bacterial siderophore on Microcystis and Anabaena |
| |
| Institution: | 1. Institute of Inorganic Chemistry, University of Vienna, Währingerstraße 42, 1090 Vienna, Austria;2. Division of Analytical Chemistry, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria;3. Department of Environmental Geosciences, University of Vienna, Althanstraße 14, 1090 Vienna, Austria;1. University of Technology Sydney, Plant Functional Biology and Climate Change Cluster, PO Box 123, Broadway 2007, NSW, Australia;2. University of Geneva, Faculty of Science, Earth and Environmental Sciences, Institute F.-A. Forel, Environmental Biogeochemistry and Ecotoxicology, 10 rte de Suisse, 1290 Versoix, Switzerland;3. CSIRO Marine and Atmospheric Research, PO Box 1538, Hobart 7001, TAS, Australia;4. Antarctic Climate and Ecosystems CRC, Private Bag 80, Hobart 7001, TAS, Australia;5. Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart 7001, TAS, Australia;6. CSIRO Materials Science & Engineering, c/o CSIRO Marine and Atmospheric Research, PO Box 1538, Hobart 7001, TAS, Australia;7. UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia;8. Central Science Laboratory, University of Tasmania, Private Bag 74, Hobart 7001, TAS, Australia;9. University of Geneva, Faculty of Science, Earth and Environmental Sciences, Institute F.-A. Forel, Marine and Lake Biogeochemistry, 10 rte de Suisse, 1290 Versoix, Switzerland;1. University of Geneva, Faculty of Science, Earth and Environmental Sciences, Institute F.-A. Forel, Marine and Lake Biogeochemistry, 10 rte de Suisse, 1290 Versoix, Switzerland;2. University of Technology Sydney, Plant Functional Biology and Climate Change Cluster, PO Box 123, Broadway 2007, NSW, Australia;3. CSIRO Materials Science and Engineering, c/o CSIRO Marine and Atmospheric Research, PO Box 1538, Hobart 7001, TAS, Australia;4. CSIRO Ocean and Atmosphere, PO Box 1538, Hobart 7001, TAS, Australia;5. Laboratory of Glaciology, Université Libre de Bruxelles, CP 160/03 Avenue F.D. Roosevelt, 50, B-1050 Bruxelles, Belgium |
| |
| Abstract: | Six siderophore-producing bacterial strains were isolated from the freshwater, in which five strains belonged to Pseudomona genus, and the other belonged to Stenotrophomonas genus. The strain, Stenotrophomonas maltophilia 15, which produced hydroxamate-type siderophore, was selected for siderophore preparation. Its siderophore production was inhibited by FeCl3, especially when FeCl3 concentration was higher than 20 μM. Effects of siderophore on cyanobacteria Microcystis aeruginosa FACHB-905 and Anabaena flos-aquae FACHB-245 were studied. Compared to the control, almost all the treated groups showed decrease in growth rate and chlorophyll a, carotenoids, phycocyanin, soluble protein, microcystin content, which was attributed the low iron bioavailability in the culture medium. In the study, S. maltophilia 15 showed algicidal activities by secreting siderophore and could inhibit cyanobacterial growth, especially when iron bioavailabity is very low. The two cyanobacterial strains showed distinct demand for iron. It was deduced that in the freshwater the competition between bacteria and cyanobacteria existed for the low-bioavailable iron, which may relate to the replacement of dominant cyanobacteria. |
| |
| Keywords: | Siderophore Iron |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
