1 Siberian Institute of Plant
Physiology and Biochemistry, Siberian Branch of RAS, Irkutsk, Russia 2 Irkutsk State University, Irkutsk, Russia
*E-Mail: grolga@sifibr.irk.ru
Received July 11, 2013
Influences of low temperatures (4
and 8 ° С) on the frost tolerance and fatty acid compositions of
cells in a winter wheat suspension
culture have been studied. It has been
found that treatment of the culture with 4 °C (7 days) did not
protect cells from subsequent freezing temperature action (-8 °С, 6 h)
and was not accompanied significant changes in the fatty acid
composition. On the contrary, the treatment of the culture with the
temperature 8 °C (7 days) prevented the death caused by freezing
temperature and the content of saturated fatty acids decreased:
pentadecanoic acid (by 35,0%), palmitic acid (by 19,9%) and stearic
acid (by 65,4%), and the content of α-linolenic acid increased by 94%.
That was the cause of the double bond index (DBI) increase by 16%. The
role of fatty acids composition changes in the process of increasing
frost tolerance in plants are discussed.
