Abstract
The presence of planktopeptin BL1125, anabaenopeptin B and anabaenopeptin F, two types of “non-toxic” cyclic peptide produced in bloom forming cyanobacteria, can provoke lysis of different non-axenic Microcystis aeruginosa cell lines via the induction of virus-like particles. The resulting particles are also able to infect the axenic M. aeruginosa cell line without lytic effects. Nevertheless, the presence of “non-toxic” cyclic peptides of cyanobacterial origin can induce lysis of these previously infected cells. This effect implies that a possible role of these peptides in the natural environment is the control of cyanobacterial population density. Lysogenic cyanobacteria can consequently act as hot-spots that, in the presence of cyanobacterial cyclic peptides, release numerous infectious particles. The process can be self-augmented with the simultaneous release of additional cyclic peptides from the producing lysogens, starting a forest fire effect that ends in collapse of cyanobacterial blooms.
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Acknowledgements
This study was supported by the Ministry of Higher Education, Science and Technology, Slovenian Research Agency by Basic Research grant (J1–7376) “How cyclic cyanobacterial peptides affect biodiversity?”, party by Program P1-0245 and by Ministry of Defence (214-00-167/2003-30). We thank Professor Roger Pain for critical reading of the manuscript.
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Sedmak, B., Carmeli, S. & Eleršek, T. “Non-Toxic” Cyclic Peptides Induce Lysis of Cyanobacteria—An Effective Cell Population Density Control Mechanism in Cyanobacterial Blooms. Microb Ecol 56, 201–209 (2008). https://doi.org/10.1007/s00248-007-9336-9
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DOI: https://doi.org/10.1007/s00248-007-9336-9