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

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Author(s): I.V. Lyubushkina | K.A. Kirichenko | O.I. Grabelnych | T.P. Pobezhimova | A.V. Fedyaeva | A.V. Stepanov | V.K. Voinikov

Journal: Journal of Stress Physiology & Biochemistry
ISSN 1997-0838

Volume: 9;
Issue: 4;
Start page: 219;
Date: 2013;
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Keywords: Triticum aestivum L. | suspension culture | low positive temperatures | freezing temperatures | cold hardening | fatty acids composition

ABSTRACT
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.
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