We are thankful to Dr Bertolt Gust and Plant Bioscience Limited (PBL) for providing strains and constructs for the Redirect PCR disruption method. Furthermore, we are grateful to Ietse Stokroos for technical assistance with scanning electron microscopy, Minie Rustema-Abbing and Henny van der Mei for performing zeta potential distribution measurements, and Vasillis Mersinias and Emma Laing for their help with the microarray data analysis. H.A.B. Wösten and L. Dijkhuizen are supported by project 816.02.009 of the Dutch Science Foundation NWO. A. Manteca and J. Sanchez are financially supported by Grant MEC-07-BIO2007-66313 from the DGI, Subdireccion General de Proyectos de Investigacion, MEC, Spain. D. Claessen was awarded EMBO and Marie Curie Long-Term Fellowships.