1. RG Molecular Biology of Plant-Microbe Interactions; Albrecht-von-Haller-Institute for Plant Sciences; University of Goettingen; Julia-Lermontowa-Weg 3 37077 Goettingen Germany
2. Department of Molecular Microbiology and Genetics; Institute for Microbiology and Genetics; University of Goettingen; Grisebachstrasse 8 37077 Goettingen Germany