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Solubilization of Peroxidase Activity from Cotton Cell Walls by Endopolygalacturonases. Larry L. Strand, Boyce Thompson Institute, 1086 North Broadway, Yonkers, New York 10701; Harry Mussell, Boyce Thompson Institute, 1086 North Broadway, Yonkers, New York 10701. Phytopathology 65:830-831. DOI: 10.1094/Phyto-65-830.

Isolated cell walls from Gossypium hirsutum and G. barbadense contained peroxidase activity. Incubation of these wall fractions with purified endopolygalacturonases from either Verticillium albo-atrum or Fusarium oxysporum f. sp. lycopersici resulted in solubilization of a protein fraction that contained peroxidase activity. Exopolygalacturonase purified from V. albo-atrum did not solubilize the peroxidase activity.