Chemical factors affecting the brown-rot decay resistance of Scots pine heartwood |
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| Authors: | Email author" target="_blank">Anni?M?HarjuEmail author Martti?Ven?l?inen Seija?Anttonen Hannu?Viitanen Pirjo?Kainulainen Pekka?Saranp?? Elina?Vapaavuori |
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| Institution: | (1) Punkaharju Research Station, Finnish Forest Research Institute, 58450 Punkaharju, Finland;(2) Suonenjoki Research Station, Finnish Forest Research Institute, 77600 Suonenjoki, Finland;(3) VTT Building and Transport, P.O. Box 1806, 02044 VTT, Finland;(4) Department of Ecology and Environmental Science, University of Kuopio, P.O. Box 1627, 70211 Kuopio, Finland;(5) Vantaa Research Centre, Finnish Forest Research Institute, P.O. Box 18, 01301 Vantaa, Finland |
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| Abstract: | The cell wall chemistry (amount of hemicellulose, f-cellulose, and total lignin) and the concentration of extractives (total acetone-soluble extractives, resin acids, pinosylvins and the total phenolics quantified as tannin acid equivalents) were studied in brown-rot resistant and susceptible juvenile heartwood of Scots pine (Pinus sylvestris L.). The study material consisted of a total of 18 trees from two 34-year-old progeny trials at Korpilahti and Kerimäki. The trees were selected from among 783 trees whose decay rate had previously been screened in a laboratory test using a brown-rot fungus, Coniophora puteana. Samples from neither location showed any significant difference in the concentration (mg/cm3) of hemicellulose, f-cellulose and total lignin between the decay resistant and susceptible trees. At both locations only the concentration of total phenolics was higher in the decay-resistant heartwood than in the decay-susceptible heartwood. At Korpilahti, the amount of acetone-soluble extractives and the concentration of pinosylvin and its derivatives were higher in the resistant than in the susceptible trees. |
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