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Changes in Epicuticularwax, Peroxidase, Polyphenol Oxidase and Cellulase Content in Differentmustard Leaves Infected with Powdery Mildew Disease in both Naturally Infected and Fungicide Treated Plants

Author(s): Rathod PJ, Chatrabhuji PM and Vakharia DN

To examine the biochemical changes in leaves of five different cultivar with powdery mildew disease infected and treated with fungicides (hexaconezole ) results showed that It also showed greater activitity of enzyme peroxidase and polyphenol oxidase. In case of leaves obtained from naturally infected plants at S1 stage (no disease) recorded enzyme activity of peroxidase, polyphenol oxides and cellulase suppressed. At infectional stage of fungicide treated plants (S2- no disease), cultivar V1 and V2 showed similar results as deserved at pre infectional stage (S1). However in addition to the above parameter wax content and cellulase were also higher at stage S2.At post infectional stage (S3) controlled plants (no diseased) had higher activities of enzymes peroxidase and cellulase. Incase of diseased leaves at post infectional stage had greater amount of cellulase activity.Overall it may be concluded that mustard cultivars naturally infected with powderymildewfungus and treated with fungicide (Hexaconezole) showed differential biochemical response and enzyme activity in mustard plants.

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