Document Detail


Neutral lipids and phospholipids in Scots pine (Pinus sylvestris) sapwood and heartwood.
MedLine Citation:
PMID:  12069923     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Variations in the concentration and composition of triacylglycerols, free fatty acids and phospholipids were analyzed in Scots pine (Pinus sylvestris L.) trees at five sites. Disks were taken at breast height or at a height of 4 m from the stems of 81 trees differing in diameter and growth rate. The mean concentration of triacylglycerols in sapwood was 26 mg g(-1) dry mass; however, variation among trees was large (16-51 mg g(dm)(-1)). The concentration of triacylglycerols was slightly larger at 4 m height in the stem than at breast height. Concentrations of triacylglycerols did not differ between the sapwood of young and small-diameter stems (DBH < 12 cm) and the sapwood of old stems (DBH > 36 cm). Concentrations of free fatty acids were negligible in the outer sapwood, but ranged between 5 and 18 mg g(dm)(-1) in the heartwood. The most abundant fatty acids of triacylglycerols were oleic (18:1), linoleic (18:2omega6, 18:2Delta5,9), linolenic (pinolenic, 18:3Delta5,9,12 and 18:3omega3) and eicosatrienoic acid (20:3Delta5,11,14 and 20:3omega6). The concentration of linoleic acid comprised 39-46% of the triacylglycerol fatty acids and the concentration was higher in the slow-growing stem from northern Finland than in the stems from southern Finland. Major phospholipids were detected only in sapwood, and only traces of lipid phosphorus were detected in heartwood.
Authors:
R Piispanen; P Saranpää
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Tree physiology     Volume:  22     ISSN:  0829-318X     ISO Abbreviation:  Tree Physiol.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-18     Completed Date:  2003-03-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100955338     Medline TA:  Tree Physiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  661-6     Citation Subset:  IM    
Affiliation:
The Finnish Forest Research Institute, P.O. Box 18 (Jokiniemenkuja 1), FIN-01301 Vantaa, Finland. riikka.piispanen@metla.fi
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MeSH Terms
Descriptor/Qualifier:
Eicosanoids / analysis
Fatty Acids, Nonesterified / analysis*
Linoleic Acid / analysis
Oleic Acid / analysis
Phospholipids / analysis*
Pinus / chemistry*
Pinus sylvestris
Plant Stems / chemistry*
Triglycerides / analysis*
Wood
alpha-Linolenic Acid / analysis
Chemical
Reg. No./Substance:
0/Eicosanoids; 0/Fatty Acids, Nonesterified; 0/Phospholipids; 0/Triglycerides; 112-80-1/Oleic Acid; 2197-37-7/Linoleic Acid; 463-40-1/alpha-Linolenic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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