  Models of galactic chemical evolution (CEMs) show that the shape of the
stellar initial mass function (IMF) and other assumptions regarding star
formation affect the resultant abundance gradients in models of late-type
galaxies. Furthermore, intermediate mass (IM) stars undeniably play an
important role in the buildup of nitrogen abundances in galaxies. Here I
specifically discuss the nitrogen contribution from IM/AGB stars and how it
affects the N/O-gradient. For this purpose I have modelled the chemical
evolution of a few nearby disc galaxies using different IMFs and star formation
prescriptions. It is demonstrated that N/O-gradients may be used to constrain
the nitrogen contribution from IM/AGB-stars.
