The effect of nitrogen fertilization on fungistatic phenolic compounds in roots of beech (Fagus sylvatica L.) and Norway spruce (Picea abies L. [Karst.])
2002
Tomova, L. | Braun, S. | Fluckiger, W. (Institute for Applied Plant Biology, Schonenbuch, (Switzerland))
The phenolic compounds showed different responses to fertilization. Fine roots of beech showed a significant decrease of (-) epicateching (84-99%) and pecatannol (78-98%) with nitrogen fertilization. Fine roots of fertilized Norway spruce showed decreased concentrations of 4-hydroxyacetophenone (33-48%), p-coumaric acid (44-64%), and pecatannol (36-61%). Concentration of p-hydroxybenzoic acid and protocatechuic acid were significantly higher in no fertilized roots. However in both tree species fertilization had no effect on vanillin and quercetin concentration in fine roots. It is suggested that roots of beech and Norway spruce are more susceptible to attacks of pathogens when they are exposed to impact of nitrogen
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