1. Laboratory of Molecular and Cellular Biology All‐Russia Research Institute for Agricultural Microbiology Podbelsky chaussee 3, Pushkin 8 196608 Saint‐Petersburg Russia
2. Laboratory of Anatomy and Morphology Komarov Botanical Institute Russian Academy of Sciences Prof. Popov street 2 197376 Saint‐Petersburg Russia
3. Department of Genetics and Biotechnology Saint‐Petersburg State University Universitetskaya Embankment 7‐9 199034 Saint‐Petersburg Russia
4. Laboratoire des Interactions Plantes–Microorganismes (LIPM) INRA, UMR441 F‐31326 Castanet‐Tolosan France
5. Laboratoire des Interactions Plantes–Microorganismes (LIPM) CNRS UMR2594 F‐31326 Castanet‐Tolosan France