Fecha de publicación: 16/01/2025 Fuente: WIPO "tomato" Nitrogen is one of the primary nutrients essential to all forms of life. However, only a few plant species can live in a symbiotic relationship with nitrogen-fixing bacteria and nitrogen must first be converted to a form that plants can utilize. Accordingly, aspects of the present disclosure relate to providing nitrogen fixation to cereal plants using genetically engineered bacteria. In some embodiments, genetically engineered bacteria comprise engineered nucleic acids encoding one or more urea metabolism regulators and/or effect the activity of one or more urea metabolism regulators. In some embodiments, the genetically engineered bacterium release more extracellular urea compared to wildtype counterparts. In some embodiments, extracellular urea is ultimately broken down into ammonia and carbon dioxide which are subsequently used by a plant cell to produce amino acids and glucose, respectively.