  We investigate the influence of photon excitations on quantum correlations in
tripartite Glauber coherent states of Greenberger-Horne-Zeilinger type. The
pairwise correlations are measured by means of the entropy-based quantum
discord. We also analyze the monogamy property of quantum discord in this class
of tripartite states in terms of the strength of Glauber coherent states and
the photon excitation order.
