Peter John Davies is a professor emeritus of Plant Physiology in the Departments of Plant Biology and Horticulture at Cornell University. He is notable for his work on plant development, plant hormones, and in educating the public on agricultural technology and genetically modified organisms (GMOs) as a Jefferson Science Fellow from 2011 to 2014. As a Jefferson Science Fellow Davies monitored developments in agriculture and food security, monitored the status of biotech crops in Europe, and provided input to promote the acceptance of these crops on a scientific basis.