Iowa State University researcher studies relationship between freezing and ‘natural thermometer’ of some plants
January 28th, 2026January 27, 2026 Iowa State Professor of Horticulture Rajeev Arora with a couple of Rhododendron hybrids displaying rolled and drooping leaves typical of cold-weather thermonasty. Photo by Paul Christiansen. AMES, Iowa — The mystery of how plants survive freezing temperatures and rebound after winter has long fascinated scientists, including Iowa State University professor of horticulture, Rajeev Arora,…