Metallicity dependence of turbulent pressure and macroturbulence in stellar envelopes L. Grassitelli, L. Fossati, N. Langer, S. Simón-Díaz, N. Castro and D. Sanyal A&A, 593 (2016) A14 Published online: 29 August 2016 DOI: 10.1051/0004-6361/201628912