  We propose that reactor experiments could be used to constrain the
environment dependence of neutrino mass and mixing parameters, which could be
induced due to an acceleron coupling to matter fields. There are several
short-baseline reactor experiment projects with different fractions of air and
earth matter along the neutrino path. Moreover, the short baselines, in
principle, allow the physical change of the material between source and
detector. Hence, such experiments offer the possibility for a direct comparison
of oscillations in air and matter. We demonstrate that for $\sin^2 2
\theta_{13} \gtrsim 0.04$, two reactor experiments (one air, one matter) with
baselines of at least 1.5 km can constrain any oscillation effect which is
different in air and matter at the level of a few per cent. Furthermore, we
find that using the same experiment while physically moving the material
between source and detector improves systematics.
