  Aspects of the supersymmetric extension of the Pohlmeyer invariants are
studied, and their relation to superstring boundary states for non-abelian
gauge fields is discussed. We show that acting with a super-Pohlmeyer invariant
with respect to some non-abelian gauge field A on the boundary state of a bare
D9 brane produces the boundary state describing that non-abelian background
gauge field on the brane. Known consistency conditions on that boundary state
equivalent to the background equations of motion for A hence also apply to the
quantized Pohlmeyer invariants.
