  The existence of minimal length scale has motivated the proposal of
generalized uncertainty principle, which provides a potential routine to probe
quantum gravitational effects in low-energy quantum mechanics experiment.
Hitherto, the tabletop experiment of testing deviations from ordinary quantum
mechanics are mostly based on microscopic objects. However, the feasibility of
these studies are challenged by the recent study of spacetime quantization for
composite macroscopic body. In this paper, we propose a scheme to probe quantum
gravity effects by revealing the deviations from predictions of Heisenberg
uncertainty principle. Our scheme focus on manipulating the interaction
sequences between external laser fields and a single trapped ion to seek
evidence of spacetime quantization, therefore reduce the complicity induced by
large bodies to some extent. The relevant study for microscopic particles is
crucial considering the lack of satisfactory theories regarding basic
properties for multi-particles in the framework of quantum gravity. Meanwhile,
we are managed to set a new upper limit for deformation parameter.
