Original scientific paper

https://doi.org/10.5552/drind.2015.1442

Lipophilic Extractives in Heartwood of European Larch (Larix decidua Mill.)

Janja Zule ; Pulp and Paper Institute, Ljubljana, Slovenia
Katarina Čufar ; University of Ljubljana, Biotechnical Faculty, Ljubljana, Slovenia
Vesna Tišler ; University of Ljubljana, Biotechnical Faculty, Ljubljana, Slovenia

Abstract

The heartwood of two European larch trees was examined for the content of lipophilic extractives. Hexane was used as a solvent for extractions, while gas chromatography with flame ionisation detection and gas chromatography coupled to mass spectrometry were applied for analyses. Different lipophilic groups of compounds, such as fatty acids, resin acids, diterpenoids, sterols, steryl esters and triglycerides were identified and quantitatively evaluated as well as individual low molecular mass components. Distribution of heartwood lipophilics in relation to the trunk heights was also determined and their most likely biological function in wood tissues discussed. The content of hexane extract increased with stem height. Various fatty and resin acids as well as diterpenoid alcohols and sterols were characterized. The predominating lipophilic compounds identified were isopimaric acid and diterpenoid alcohol larixyl acetate. Their average concentrations in examined samples was between 2.0 and 2.5 mg/g. Higher molecular mass lipophilics, e.g. steryl esters and triglycerides, were also present with concentrations between 0.5 and 2.2 mg/g.

Keywords

European larch; heartwood; lipophilic extractives; chromatographic techniques

Hrčak ID:

150808

URI

https://hrcak.srce.hr/150808

Publication date:

7.1.2016.

Article data in other languages: croatian

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