Seasonal variation of neutral lipids in Pinus sylvestris L. sapwood and heartwood

被引：0
|
作者：
Saranpaa, Pekka [1 ]
Nyberg, Harri [1 ]
机构：
[1] Univ Helsinki, Dept Bot, SF-00170 Helsinki, Finland
来源：
TREES-STRUCTURE AND FUNCTION | 1987年 / 1卷 / 03期
关键词：
Fatty acids; Heartwood; Pinus sylvestris; Sapwood; Seasonal variation;
D O I：
暂无
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
The lipid levels and fatty acid composition of three fractions ( free fatty acids, triacylglycerols and sterol/triterpenoid esters) extracted from the sapwood and heartwood of three stems of Pinus sylvestris were determined to investigate both seasonal changes in sapwood and possible metabolic changes related to heartwood formation. Seasonal changes were observed only in the amount of the free fatty acids in the sapwood: the level of free fatty acids was greatest at the beginning and end of the growing season. In the January and March samples the amount of the free fatty acid fraction in the sapwood was very small. The amount of the other fractions remained at the same level throughout the study. Marked seasonal changes in the fatty acid composition occurred only in the free fatty acid fraction of the sapwood: the saturation grade increased during the winter.
引用
收藏
页码：139 / 144
页数：6
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