SEASONAL-VARIATION OF PEROXIDASE-ACTIVITY IN CHESTNUT TREES

Peroxidase (E.C.1.11.1.7) activity in twigs of American (Castanea dent ata), Chinese (C. mollissima), and Japanese (C. crenata) chestnut was determined monthly over an eight month period. The total amount of per oxidase activity was highest in December and April for most trees. An inhibitor of peroxidase activity was present in the extracts which cou ld be removed by gel filtration. Extracts from healthy twigs had consi stent major bands on IEF gels. However, a new band was detected in bar k of American chestnut after wounding or infection with chestnut bligh t fungus (Cryphonectria parasitica). (C) 1998 Elsevier Science Ltd. Al l rights reserved.