Understanding how plants sense and respond to N is the first step towards developing strategies that intervene in molecular networks for biotechnological purposes such as improving N use efficiency in plants. Our research involves the study of N-controlled regulatory genes which may influence phenotypes with agronomical value, such as enhanced growth when N is limited. Whereas our project relates specifically to Arabidopsis, the functional genomic tools available in this model organism makes it the most efficient first step towards engineering traits of interest in plant species with agronomic importance. This is of great interest in Chile, a country with a strong agricultural industry.