shoots, but such up-regulation was abolished when Bt was coinoculated
with the fungi (Fig. 3). The genes ZmPIP2; 4 and
ZmPIP2; 6 were down regulated by either Bt or AM inoculation. In
roots, the inoculation of the AM fungi up-regulated the expression
of ZmPIP2; 3 and ZmPIP2; 4 and the double inoculation AM þ Bt upregulated
ZmPIP1; 1, ZmPIP1; 3, and ZmPIP2; 3 (Fig. 4).