Journal of Stress Physiology & Biochemistry, Vol. 9 No. 4 2013, pp. 241-250 ISSN 1997-0838
Original Text Copyright (cc) 2013 by   Borovik, Grabelnych, Koroleva, Pobezhimova, Voinikov



ORIGINAL ARTICLE
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The Relationships Among an Activity of the Alternative Pathway Respiratory Flux, a Content of Carbohydrates and a Frost-Resistance of Winter Wheat

O.A. Borovik*, O.I. Grabelnych, N.A. Koroleva, T.P. Pobezhimova, V.K. Voinikov

Siberian Institute of Plant Physiology and Biochemistry, Siberian Branch of RAS, Irkutsk, Russia

*E-Mail:  ol.borovik@mail.ru


Received July 14, 2013


A content of carbohydrates and dehydrins in the leaves, activities of the alternative (AP) and the cytochrome (CP) pathways of respiration in mitochondria, isolated from leaves, during cold hardening continuous light (5 °C) and dark conditions with sucrose (2 °C) and relationships among these parameters and a frost-resistance of winter wheat have been investigated. The direct relationship among the content of carbohydrates, the activity of AP and frost-resistance of winter wheat has been detected. It has been concluded that the activity of the alternative oxidase  during  cold  hardening  of  winter  wheat  depends  on  the  content  of  soluble carbohydrates and is necessary to maintain metabolic (red/ox) homeostasis in the cell at low temperatures.

Key words:   alternative pathway, carbohydrates, mitochondria, frost-resistance, Triticum aestivum L.

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