Ian Brookman Ferguson, Scientist, Postharvest Science Group, HortResearch, Auckland, is a plant physiologist recognised as a world authority on calcium in plants whose applied research on the uptake, movement and accumulation of calcium in fruit (particularly pip fruit) has made a major impact in improving fruit quality. Results from his work have provided the basis of current production and postharvest management practices designed to minimise calcium-related disorders such as bitter pit and lenticel blotch and to maintain fruit quality during storage and transport. Dr Ferguson’s calcium and mineral research and development is a cornerstone of the $500 million pipfruit industry of New Zealand. He has also been involved in fundamental studies on plant senescence, particularly aspects of programmed cell death and oxidative metabolism. He was awarded a Royal Society Science and Technology Medal in 1996.