1. 1Department of Microbiology, University of Georgia, Athens, GA 30602, USA
2. 2Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, USA
3. 3Institut für Mikrobiologie, Veterinärmedizinische Universität Wien, Veterinärplatz 1 A-1210 Wien, Austria
4. 4Aix-Marseille Université, IRD, VITROME, IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005 Marseille, France
5. 5Department of Plant and Environmental Sciences, The Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401 Jerusalem, Israel
6. 6National Research Council of Italy, Institute of Ecosystem Study, I-50019 Sesto Fiorentino, Italy