1. Laboratory of General Microbiology, Section of Genetics, Development and Molecular Biology, School of Biology, Aristotle University, Thessaloniki 54006, Greece, Laboratory of Systematic Botany and Phytogeography, Section of Botany, School of Biology, Aristotle University, Thessaloniki 54006, Greece, and Department of Botany, Aristotle University, P.O. Box 109, Thessaloniki 54006, Greece