Role of Changes in Cell Fatty Acids Composition in the Increasing of Frost Resistance of Winter Wheat Suspension Culture

Lyubushkina, I. V.; Kirichenko, K. A.; Grabelnych, O. I.; Pobezhimova, T. P.; Fedyaeva, A. V.; Stepanov, A. V.; Voinikov, V. K.
December 2013
Journal of Stress Physiology & Biochemistry;2013, Vol. 9 Issue 4, p219
Academic Journal
Influences of low temperatures (4 and 8 °C) 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 °C, 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.


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