M. Tyagi et al., The role of peroxidase and polyphenol oxidase isozymes in wheat resistanceto Alternaria triticina, BIOL PLANT, 43(4), 2000, pp. 559-562
Polyphenol oxidase activity was higher in resistant wheat cultivar ACC-8226
than in susceptible cultivar MP-845 in control sets and after inoculation
of Alternaria triticina. However, similar polyphenol oxidase isozyme patter
n was found in control and inoculated sets of both the cultivars, but the b
and intensity was higher after inoculation. Three and four peroxidase isozy
mes were found in ACC-8226 and MP-845, respectively. An extra peroxidase is
ozyme band was observed in both the cultivars after inoculation. The result
s suggest an active role of peroxidase and polyphenol oxidase in defence me
chanism of wheat plants.