Communicating Editor: R. Narikawa.
Stability of some microginins synthesized by the cyanobacterium Woronichinia naegeliana (Unger) Elenkin
Article first published online: 16 MAY 2014
© 2014 Japanese Society of Phycology
Volume 62, Issue 3, pages 228–231, July 2014
How to Cite
Bober, B., Kaminski, A., Chrapusta, E. and Bialczyk, J. (2014), Stability of some microginins synthesized by the cyanobacterium Woronichinia naegeliana (Unger) Elenkin. Phycological Research, 62: 228–231. doi: 10.1111/pre.12058
- Issue published online: 10 JUL 2014
- Article first published online: 16 MAY 2014
- Manuscript Accepted: 2 FEB 2014
- Manuscript Received: 4 SEP 2013
- Municipal Water and Sewage Enterprise in Krakow
- Woronichinia naegeliana.
Microginins are linear oligopeptides synthesized by cyanobacteria. The literature data on their characteristics are scant. This study examined the influence of abiotic factors including pH, temperature, visible and ultraviolet radiation on the stability of the microginins FR3 (MG-FR3), FR4 (MG-FR4) and 757 (MG-757) synthesized by Woronichinia naegeliana. In alkaline conditions (pH 9) only the concentration of MG-757 was reduced significantly, by 14.3%. The tested microginins were stable at room temperature (half-life 7–17 weeks). Boiling for one hour caused 26.1% decomposition of MG-FR4 and 26.8% decomposition of MG-757; MG-FR3 was not significantly affected. Under visible radiation the initial content of MG-FR4 declined 23.0%, but MG-FR3 and MG-757 proved insensitive to it. Treatment with a high dose of UV radiation (36 μmol m−2 s−1) caused the tested microginins to degrade by 13.8% to 21.4%. The study showed these microginins to be oligopeptides of high stability, the most stable of them being MG-FR3.