Abstract
It was shown in [13], in the context of bosonic theory
that the IR singular terms that arise as a result of integrating out
high momentum modes in nonplanar diagrams of noncommutative gauge
theory can be recovered from low lying tree-level closed string
exchanges. This follows as a natural consequence of world-sheet
open-closed string duality. Here using the same setup we study the
phenomenon for noncommutative 
= 2 gauge theory realised on a
D3 fractional brane localised at the fixed point of 
2/
2. The IR singularities from the massless closed
string exchanges are exactly equal to those coming from one-loop gauge
theory. This is as a result of cancellation of all contributions from
the massive modes.
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