Fuente: WIPO "tomato" The present disclosure generally relates to modified Pooideae cereal grass plants that are modified to overexpress a nicotianamine synthase (NAS) protein or a functional variant thereof, wherein the NAS protein is of a Pooideae cereal grass plant; and plant parts thereof. The present disclosure also extends to methods of generating the modified plants and methods of increasing the nicotianamine (NA), 2' deoxymugineic acid (DMA), iron and/or zinc levels in a Pooideae cereal grass plant.