THE COMPOSITION OF TOTAL LIPID FRACTIONS AND FATTY ACIDS IN BUDS OF BIRCH SPECIES DURING BUD BREAK

In the process of bud break in downy birch Betula pubescens Ehrh., silver birch Betula pendula Roth, and Karelian birch Betula pendula var. carelica Merckl., total lipid (TL) content in buds varied within 27–45 % of absolute dry weight (a. d. w.). The chief TL fraction was neutral lipids, contributi...

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Bibliographic Details
Published in:Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
Main Authors: Nadezhda Chernobrovkina, Irina Morozova, Maria Ilyinova
Format: Article in Journal/Newspaper
Language:English
Russian
Published: Karelian Research Centre of the Russian Academy of Sciences 2018
Subjects:
betula pubescens ehrh
betula pendula roth
betula pendula roth var. carelica (mercklin) hämet-ahti
buds
bud break phases
total
neutral
phospho- and glycolipids
fatty acids
Science
Q
karelian
Online Access:https://doi.org/10.17076/eb782
https://doaj.org/article/768665b9268d4599b5e515f4c2a2cc22
Description
Summary:In the process of bud break in downy birch Betula pubescens Ehrh., silver birch Betula pendula Roth, and Karelian birch Betula pendula var. carelica Merckl., total lipid (TL) content in buds varied within 27–45 % of absolute dry weight (a. d. w.). The chief TL fraction was neutral lipids, contributing up to 42 % of a. d. w., whereas glyco- and phospholipids did not exceed 13 and 8 %, respectively. Unsaturated FA in birch buds contributed up to 85 % to total FA. They were primarily represented by linoleic and linolenic acids (up to 44 and 39 % of total FA, respectively). The most abundant saturated FA was palmitic acid (up to 32 %). Linoleic acid content declined further into the bud break period. Species-specific features of the lipid composition of breaking buds in the birches were identified.

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