Changes in Sapwood of Roots of Norway Spruce, Attacked by Fomes annosus. Part I |
| |
Authors: | MARTIN JOHANSSON OLOF THEANDER |
| |
Institution: | Department of Forest Botany and Pathology, Royal College of Forestry, S-104 05 Stockholm, Sweden and Chemistry Department, Swedish Forest Products Research Laboratory, Box 5604, S-114 86 Stockholm, Sweden |
| |
Abstract: | Chemical and physiological changes occurring in root sapwood of Norway spruce (Picea abies L.] Karst.), when attacked by Fomes annosus (Fr.) Cke, were studied. The transformation of sapwood to reaction zone, induced by the fungal attack, implies a very sharp increase of carbonate content, correlated with higher amounts of potassium, calcium and magnesium. The buffer capacity of the reaction zone is strong, especially in the pH range 6–9. The high peroxidase activity in the rays of the sapwood is almost totally absent in the reaction zone, probably due to inactivating phenolic compounds. o-Diphenol oxidase was detectable only in the presence of microorganisms. p-Diphenol oxidase was active in connection with decaying wood but not in the reaction zone. |
| |
Keywords: | |
|
|