1. Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl von Linné Weg 10, D-50829 Köln, Germany.
2. Department of Plant Biology, Carnegie Institute of Washington, Stanford, CA 94305, USA.
3. Department of Stress and Developmental Biology.
4. Department of Bioorganic Chemistry, Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany.
5. Laboratorio de Bioquímica y Biología Molecular, Departamento de Biotecnología-Universidad Politécnica de Madrid Escuela Técnica Superior de Ingenieros Agrónomos, Avenida Complutense s/n, E-28040 Madrid, Spain.