THE SYNTHESIS OF STRESS PROTEINS AND FUNCTIONING OF WINTER WHEAT MITOCHONDRIA AT HYPERTHERMIA

Original title

СИНТЕЗ СТРЕССОВЫХ БЕЛКОВ И ФУНКЦИОНИРОВАНИЕ МИТОХОНДРИЙ ОЗИМОЙ ПШЕНИЦЫ ПРИ ГИПЕРТЕРМИИ

Authors

T.P. Pobezhimova¹, N.S. Zabanova^1,2, O.I. Grabelnych^1,2, V.K. Voinikov¹

Contact information

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

²Irkutsk State University, Irkutsk, Russia. E-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.

Pages

94-96

DOI

10.31255/978-5-94797-318-1-94-96

Abstract

The relationship between the content of reactive oxygen species (ROS), the synthesis of stress proteins (Hsp101, low molecular weight HSP), and the functional activity of winter wheat mitochondria under high-temperature exposure has been studied. It is shown that heat shock (47 °C, 30 min) leads to the development of oxidative stress in the winter wheat shoots, to disruption of the intactness of the mitochondrial outer membrane and to a significant decrease in their activity. The development of oxidative stress, damage of the mitochondrial integrity and their activity can be prevented by pre-treatment of seedlings with hardening temperature (37 °C, 2 or 24 h). Cytoplasmic stress proteins (Hsp101 and Hsp17.6) synthesized at 37 °C in winter wheat shoots are found in mitochondria. These proteins probably affect the functional activity of mitochondria, preventing of respiratory chain damage caused by heat shock, reducing the ROS generation.