Trees

, Volume 8, Issue 5, pp 228–231

Variation in the amount of triacylglycerols and steryl esters in the outer sapwood of Pinus sylvestris L.

  • Pekka Saranpää
  • Riikka Piispanen
Article

DOI: 10.1007/BF00196626

Cite this article as:
Saranpää, P. & Piispanen, R. Trees (1994) 8: 228. doi:10.1007/BF00196626

Abstract

Variation in the amount of triacylglycerols and steryl esters was analysed enzymatically in the outer sapwood of Scots pine (Pinus sylvestris L.). Increment borings were taken at breast height from 40 stems of different diameter. Wood samples from outer sapwood (10 mm from the cambium) were extracted with acetone. Triacylglycerols and steryl esters were separated on TLC and the levels of glycerol and sterol were analysed enzymatically. The average amount of triacylglycerols and steryl esters was approximately 25 and 0.83 mg/g dry weight, respectively. However, variation between the stems studied was fairly large. The sapwood of young and small-diameter stems was not found to store larger amounts of either triacylglycerols or steryl esters than the sapwood of old stems. Neither was there any relationship between the amount of triacylglycerols and steryl esters in the outer sapwood. The possible role of these compounds in heartwood formation is discussed.

Key words

Heartwood formationPinus sylvestrisSapwoodSteryl estersTriacylglycerols

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Pekka Saranpää
    • 1
  • Riikka Piispanen
    • 2
  1. 1.The Finnish Forest Research InstituteHelsinkiFinland
  2. 2.Department of BotanyUniversity of HelsinkiHelsinkiFinland