Invited lectures: University Paul Sabatier, Toulouse, France; University of Troms�, Norway; TULIP (INRA CNRS) Summer School, Ramonjuan, France; Edinburgh University, UK; NUI Galway Botany Society; Royal Holloway, University of London, UK; University of Rouen, France; ITQB, Lisbon, Portugal; University College Dublin, Ireland;� Trinity College Dublin, Ireland; Max Planck Institut f�r Pflanzenphysiologie, G�lm, Germany; Postgraduate cell wall course, University of Helsinki