A. Anagnostopoulos (Botanical Institute, Department of Biology, University of Patras)
G. Hagedorn (Federal Biological Research Center, Institute for Microbiology, Berlin)
J. Jakupovic (Faculty of Chemistry, Technical University of Berlin and AnalytiCon GmbH, Berlin)
P. L. Nimis (Biology Department, University of Trieste)
B. Valdés (Department of Phytobiology and Ecology, University of Seville)