The activities of GST and GPx enzymes were subsequently
determined to assess potential alterations in the oxidative stress
defense mechanisms and detoxification processes mediated by
glutathione. Enzyme activities increased significantly in the roots
of plants exposed to A. ovalisporum cell extracts containing 2.5 mg/
L CYN (Fig. 2a and b). Nevertheless, GST and GPx leaf levels were
similar to control.