Abstract
Abstract Histopathology of cankers on Cupressus caused by Seiridium cardinale. The purpose of this work was to understand host defense reactions of cypress trees against S. cardinale canker to improve selection of clones resistant to the disease. Following infection, bark recovery depends on the neophellogenic efficiency to build a necrophylactic periderm (NP) that compartmentalizes the diseased tissue. The thicker the NP the more resistant the bark. Neophellogenic activity can be estimated by measuring the thickness of constitutive phelloderm of the bark of trees from natural plantings or seedlings. Potentially resistant clones having phelloderms thicker than 100μm will be selected for further experiments.
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