1. Department of Microbiology; Karlsruhe Institute of Technology; Institute for Applied Biosciences; Hertzstrasse 16 D-76187 Karlsruhe Germany
2. Centre for Plant Biotechnology and Genomics (CBGP) U.P.M. - I.N.I.A.; Campus de Montegancedo; Autopista M-40 (Km 38) 28223 Pozuelo de Alarcón, Madrid Spain