[Mg/Fe] as a function of [Fe/H] (right panel) and [Mg/H] (left panel) for our bulge red clump sample (red points) compared with thick (blue) and thin (black) discs stars. In the two upper panels, the disc reference samples are from the main sequence stars studies of Bensby et al. (2005) (triangles), Reddy et al. (2006) (squares), Fuhrmann (2008) (crosses), whereas the two lower panels show the solar neighbourhood disc giants by Alves-Brito et al. (2010), as well as their bulge giants (large filled cyan circles). In the low metallicity range ([Fe/H] <  −0.3 and  [Mg/H] < 0), the thick disc and the bulge show similar [Mg/Fe] ratios, higher than in thin disc stars.