On Friday, 20th of April, Christoffer Johnsson successfully defended his thesis titled “Elucidating the phytohormonal control of xylem development”. He could show in his thesis that the plant hormones auxin and gibberellin are important signals for normal wood development in poplar trees. The public defence took place in P-O Backströms sal at SLU Umeå. Faculty opponent was Andrea Polle from the Buesgen Institut, Georg-August University Göttingen, Germany. His academic supervisor was Urs Fischer.
Link to the doctoral thesis: http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4828
You can find more background information about Christoffer Johnsson’s work here (in Swedish):