Tebuconazole Regulates Fatty Acid Composition of Etiolated Winter Wheat Seedlings

Korsukova, A.V.; Gornostai, T.G.; Grabelnych, O.I.; Dorofeev, N.V.; Pobezhimova, T.P.; Sokolova, N.A.; Dudareva, L.V.; Voinikov, V.K.

Journal of Stress Physiology & Biochemistry, Vol. 12 No. 2 2016, pp. 72-79 ISSN 1997-0838
Original Text Copyright (cc) 2016 by Korsukova, Gornostai, Grabelnych, Dorofeev, Pobezhimova, Sokolova, Dudareva and Voinikov

ORIGINAL ARTICLE

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QueryDate : 2016-12-24
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Tebuconazole Regulates Fatty Acid Composition of Etiolated Winter Wheat Seedlings

A.V. Korsukova^1,2*, T.G. Gornostai¹, O.I. Grabelnych^1,2, N.V. Dorofeev¹, T.P. Pobezhimova¹, N.A. Sokolova¹, L.V. Dudareva¹, V.K. Voinikov¹

¹ Siberian Institute of Plant Physiology and Biochemistry, SB RAS, Irkutsk, Russia
² Irkutsk State University, Irkutsk, Russia

*E-Mail: avkorsukova@gmail.com

Received May 12, 2016

The fatty acid composition of shoots of unhardened and hardened to cold etiolated winter wheat seedlings grown from seeds treated with tebuconazole-based protectant «Bunker» (content of tebuconazole 60 grams per liter, g/L), and the seedlings frost resistance has been studied. It is shown that treatment of winter wheat seeds by «Bunker» preparation (1,5 microliter per gram of seeds, µl/g) is accompanied by an increase of the fatty acids unsaturation in the shoots and increase of the seedlings frost resistance (–8°C, 24 h). The most pronounced decrease in the content of saturated palmitic acid and increase in the content of unsaturated α-linolenic acid were observed during cold hardening of winter wheat seedlings grown from seeds treated by tebuconazole-based protectant.
It is concluded that the seeds treatment with tebuconazole-based protectant causes changes of fatty acid composition of winter wheat seedlings to increase their frost resistance.

Key words: triazole, tebuconazole, winter wheat, Triticum aestivum L., fatty acid composition, α-linolenic acid, Double Bond Index, frost-resistance