1. Universität Konstanz, Mathematisch‐Naturwissenschaftliche Sektion, Fachbereich Biologie, D‐78457 Konstanz, Germany;
2. Faculty of Biological Sciences and Institute of Physical Biology, University of South Bohemia, Branišovská 31, CZ‐370 05 České Budejovice, Čzech Republic;
3. Photon Systems Instruments Ltd, Koláčkova 31, CZ‐62100 Brno, Czech Republic;
4. Microbiological Institute, ASCR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ‐37981 Třeboň, Czech Republic