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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

Author(s): O.A. Borovik | O.I. Grabelnych | N.A. Koroleva | T.P. Pobezhimova | V.K. Voinikov

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

Volume: 9;
Issue: 4;
Start page: 241;
Date: 2013;
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Keywords: alternative pathway | carbohydrates | mitochondria | frost-resistance | Triticum aestivum L.

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.
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