My group has studied root development in response to nutritional deficiencies, salinity or drought stress. We have developed novel devices, D-Root and TGRooZ (patented), to grow plants in vitro with the root system in the dark and to generate soil temperature gradients to study the responses of plant roots to heat, mimicking conditions natural. With these systems we are studying the responses of plants to nutritional deficiencies and high temperatures, two factors that threaten food security.