  Unusual constituent quark axial current couplings to light vector mesons,
$\rho$ and $\omega$, are derived in the vacuum and under weak magnetic field by
considering a quark-antiquark interaction mediated by a non perturbative gluon
exchange. Similarly, light axial mesons are found to couple anomalously with
the constituent quark vector current. These interactions are of the type of the
Wess-Zumino-Witten terms, being strongly anisotropic and dependent on the
vector (or axial) meson polarization. They also provide axial (vector) form
factors for the vector (axial) mesons and are quite small, suppressed nearly by
$1/{M^*}^2$ with respect to the vector mesons minimal coupling to the quark
vector current. Some three leg meson vertices are also presented:
$\pi-\rho-A_1$ and $V_1V_2 A$ (where $V_1,V_2$ are vector mesons and $A$ an
axial meson). A vector and axial-vector mesons mixing is identified at non zero
magnetic field which however can contribute only in the presence of a third
particle or in a medium. Numerical results are presented for different
effective gluon propagators.
