Dr. Osmond's research in Crassulacean acid metabolism and C4 photosynthesis is widely recognized as providing a major component of present day knowledge of these processes and has raised important ecological implications related to adaptation and acclimation. His work in photorespiration, together with collaborators, goes further than any other studies to tie together biochemistry, physiology and plant performance to environmental conditions. In addition he has made important contributions to several specific aspects of ion absorption and metabolism, to the physiology of salt tolerant plants, and to the photosynthetic physiol.ogy of marine plants. Apart from bis substantial personal contributions, a feature of his work is the ability to integrate his own research and that of his colleagues into broad advances in basic plant physiology.