Journal of Stress Physiology & Biochemistry, Vol. 7, No. 4, 2011, pp. 97- 112. ISSN 1997-0838
Original Text Copyright (cc) 2011 by Lyubushkina, Grabelnych, Pavlovskaya, Pobezhimova, Koroleva, Voinikov


ORIGINAL ARTICLE

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The role of mitochondria in response of wild grass Elymus sibiricus L. seedlings to temperature stress, water deficiency and hydrogen peroxide exposure 

Lyubushkina I.V., Grabelnych O.I., Pavlovskaya N.S., Pobezhimova T.P., Koroleva N.A., Voinikov V.K.
Siberian Institute of Plant Physiology and Biochemistry Siberian Branch of Russian Academy of Sciences, Lermontova st., 132, Irkutsk, 664033 Russia
E-mail: grolga@sifibr.irk.ru

Received August 25, 2011

The relationship between energetic parameters and content of stress proteins (alternative oxidase, uncoupling protein and HSP70) in wild grass Elymus sibiricus mitochondria during different stress exposure (cold hardening, cold shock, high-temperature stress, water deficiency and oxidative stress) has been studied. It has been shown that influence of mild stress factors (cold hardening and exogenous 0.5 mM hydrogen peroxide treatment) result in adaptive changes related to the increase of activity alternative oxidase and the increase of content such proteins as alternative oxidase, uncoupling protein and HSP70. The comparative analysis of the function of the cultured and wild plants mitochondria in stress conditions has been produced.

Key words: alternative oxidase / Elymus sibiricus / mitochondria / stress / stress proteins.


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