Journal of Stress Physiology & Biochemistry, Vol. 6 No. 4
2010, pp. 51-65 ISSN 1997-0838
Original Text Copyright (cc) 2010 by Zhivet’ev, Graskova, Dudareva,
Stolbikova, Voinikov
ORIGINAL
ARTICLE
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QueryDate : 2016-12-24
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Change of fatty-acid composition in
plants during adaptation to hypothermia
M.A. Zhivet’ev*, I.A. Graskova, L.V. Dudareva, A.V. Stolbikova, V.K.
Voinikov
Siberian Institute of Plant
Physiologi and Biochemistry, Siberian Division of the Russian Academy
of Sciences, Irkutsk, Russia *Corresponding Author: nik.19@mail.ru
Tel.: (395-2)42-50-09 Fax:
(395-2)51-07-54
Received October 30, 2010
The study of inter-species variability of fatty acid
composition in leaf tissues of three species of medicinal plants
growing in Predbaikal’ye showed that this composition has a
species-specific character. In the composition of unsaturated fatty
acids of all the species studied there prevail poly-unsaturated fatty
acids – linoleic and linolenic, which implies high values of double
bonds values (up to 2,19 in the yarrow). Along with high values of
desaturatioin ratio (up to 4.7 in yarrow), this fact proves high
potential of cold resistance in the species under study.
The analysis of seasonal changes in the fatty acid composition of the
three species of medicinal plants demonstrated that with the average
daily temperature going down, regular reduction in the content of
saturated fatty acids and increase in the content of unsaturated fatty
acids take place. Changes in fatty acid composition of lipids and the
level of ω9- and ω3-desaturases activity in leaf tissues in the course
of adaptation to reduction of average daily air temperature in the
plants under study were found to have inter-species differences as well.
The data acquired allow to presume that high cold resistance potential
in the species under study is, among other things, linked to the
processes of fatty acids biosynthesis within lipids.
