  We include instanton effects in QCD sum rules for coupled scalar glueballs
and mesons. We find a light glueball/sigma as in earlier studies without
instantons, but in a lattice-type pure instanton model the light glueball/sigma
is not found. In the 1-2 Gev region we now find that lightest I=0 meson, in the
region of the f$_o$(1370), has no direct glueball mixing, with the instanton
loop replacing the glueball component. The lightest scalar mainly glueball in
the region of the f$_o$(1500) is sensitive to the choice of nonperturbative
gluonic parameters.
