1. Botany Department, Faculty of Science, Ain Shams University, Abbassia Square-11566, Cairo, Egypt
2. Museo delle Scienze – MUSE, Limnology and Phycology Section, Corso del Lavoro e della Scienza 3, I-38123 Trento, Italy
3. Biology Centre of the CAS, v.v.i., Institute of Hydrobiology, Na Sádkách 7, CZ–37005 České Budějovice, Czech Republic
4. Institute of Botany of the CAS, v.v.i., Centre for Phycology, Dukelská 135, CZ–37982 Třeboň, Czech Republic
5. Faculty of Science, University of South Bohemia, Department of Botany, Branišovská 1760, CZ–37005 České Budějovice, Czech Republic
6. Department of Physics, Bioorganic Chemistry Lab, University of Trento, Via Sommarive 14, 38123 Povo, Trentino, Italy
7. CNR, Institute of Biophysics, Trento, Via alla Cascata 56/C, 38123 Povo, Trento, Italy