DIFFERENCES IN THE MECHANISMS OF THE ACTION OF TEBUCONAZOLE AND THE TEBUCONAZOLE-BASED PROTECTANT ON THE ACTIVITY OF WINTER WHEAT MITOCHONDRIA

Original title

РАЗЛИЧИЯ В МЕХАНИЗМАХ ДЕЙСТВИЯ ТЕБУКОНАЗОЛА И ТЕБУКОНАЗОЛ-СОДЕРЖАЩЕГО ПРОТРАВИТЕЛЯ НА АКТИВНОСТЬ МИТОХОНДРИЙ ОЗИМОЙ ПШЕНИЦЫ

Authors

A.V. Korsukova^1,2, O.A. Borovik¹, T.P. Pobezhimova¹, N.S. Zabanova^1,2, N.V. Dorofeev¹, O.I. Grabelnych^1,2

Contact information

¹Siberian 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

58-60

DOI

10.31255/978-5-94797-318-1-58-60

Abstract

The influence of tebuconazole-based seeds protectant "Bunker" (1,5 microliter per gram of seeds, µl/g) and tebuconazole (1 mM) on the energetic parameters of mitochondria isolated from shoots of non-hardened and cold-hardened (2 °C, 7 days) etiolated winter wheat seedlings (Triticum aestivum L., variety Irkutskaya) has been studied. It is shown that under standard conditions (24 °C) tebuconazole significantly reduces the rate of malate oxidation by inhibiting the cytochrome pathway (CP) of mitochondrial respiration. While the tebuconazole-based protectant "Bunker" suppresses both the CP and alternative pathway (AP). Tebuconazole and the tebuconazole-based protectant cause an increase in the oxidative activity of mitochondria from the cold-hardened plants, which is due to an increase in the contribution of AP mainly to the oxidation of malate.