Studied Medicine at the University of Zurich UZH and switched as a cand. med. to Plant Biology UZH, where he got his PhD with a thesis on heterochromatin and DNA replication (Exptl Cell Res 64/2 (1971) 323-330).
After a Molecular Biology training in Charles Weissmann's Lab he did his first steps as a Plant Physiologist at UZH studying the role of caffeine in plant species producing it.
He made his post-doc at USC in LA, where he investigated the Cell Physiology in Wilms' tumor (Proff. John W Beierle and Sam Allerton). Then, he returned to the Plant Biology at UZH to become Assistant, Docent, and finally Associate Professor of Plant Physiology. A list of his scientific publications is here
Since his retirement he acts as a book author inspired and artistically assisted by his wife Beatrice Häsler