Original Paper

Trees

, Volume 27, Issue 1, pp 131-139

First online:

Variation of stilbene glucosides in bark extracts obtained from roots and stumps of Norway spruce (Picea abies [L.] Karst.)

  • Harri Latva-MäenpääAffiliated withThe Finnish Forest Research Institute (Metla)Laboratory of Organic Chemistry, Department of Chemistry, University of Helsinki Email author 
  • , Tapio LaaksoAffiliated withThe Finnish Forest Research Institute (Metla)
  • , Tytti SarjalaAffiliated withThe Finnish Forest Research Institute (Metla)
  • , Kristiina WähäläAffiliated withLaboratory of Organic Chemistry, Department of Chemistry, University of Helsinki
  • , Pekka SaranpääAffiliated withThe Finnish Forest Research Institute (Metla)

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Abstract

Acetone-soluble compounds found in different root zones and stumps of Norway spruce (Picea abies [L.] Karst), which were grown on either peatland or a mineral soil site, were studied. Samples from stumps and roots of different sizes and ages were collected a day after the trees were felled. The wood and bark of stumps and three zones of the roots were separated and extracted with acetone in an ultrasonic bath. Extracts were silylated and analysed by gas chromatography–mass spectrometry. The stilbene glucosides astringin and isorhapontin were major compounds in the spruce bark samples. The resveratrol glucoside piceid and the flavonoid catechin were also extracted from spruce bark. We also found the lignan hydroxymatairesinol in some wood extracts. Total concentrations of stilbene glucosides in bark of stumps and different root zones varied between 0.53 and 8.29 % (w/w, dry weight) with isorhapontin being the major compound. Isorhapontin concentrations were highest in the spruce samples grown on mineral soil. The bark of the roots close to the stem is a rich source of stilbenes for commercial utilisation.

Keywords

Norway spruce Picea abies Roots Stump Bark Stilbene glucosides