1. Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road; London; E1 4NS; UK
2. Institute of Biophysics; Academy of Sciences of the Czech Republic; v.v.i. Kralovopolska 135; CZ-61265; Brno; Czech Republic
3. Biology Centre ASCR; Institute of Plant Molecular Biology; Branišovská 31; České Budějovice; CZ-37005; Czech Republic
4. Jodrell Laboratory; Royal Botanic Gardens; Richmond; Surrey; TW9 3DS; UK
5. Institute Jean-Pierre Bourgin; Institut National de la Recherche Agronomique; Versailles; 78026; France