  We have investigated the Regge trajectories of exotic hadrons by considering
different possible pentaquark configurations with finite quark mass in the flux
tube model. Signifi- cant deviation is observed in the linear behavior of the
Regge trajectories for pentaquark systems in view of the universal value of the
Regge slope parameter for hadrons. The modified Regge trajectories are also
compared with the available experimental and lat- tice data. It is observed
that the non-linear Regge trajectories of such pentaqurk systems can be well
described by the relativistic corrections in view of the current quark masses
and the high rotational speed of the quarks at the end of flux tube structure.
