“Non-toxic” cyclic peptides induce lysis of cyanobacteria-an effective cell population density control mechanism in cyanobacterial blooms
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[1] Tel Aviv University
Tel Aviv University
Israel
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- Localización: Microbial ecology, ISSN-e 1432-184X, ISSN 0095-3628, Vol. 56, Nº. 2, 2008, págs. 201-209
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
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.
