In case of simultaneous and alternate inoculation and infection of P. indica and B. cinerea, a decreased activity of GST, GR, CAT and SOD were found as compared to plant infected with B. cinerea, however, significant decreased activity was found in case of plants inoculated first with the P. indica and later infected with the B. cinerea as compared to the plants infected with the B. cinerea only (P < 0.05) (Fig. 7A–D). Here, CAT is linked to infection.