Sensitivity of respiration and swelling of cereals mitochondria to modifying permeabilitymitochondrial membranes compounds
The aim of the given investigation was to study the influence of compounds modifyingpermeability of mitochondrial membranes on the functioning of cereals mitochondria differingin the extent of cold resistance. It is shown that Ca-dependent and CsA-sensitivepore exist in mitochondria of studied cereals. It is determined that short-term and longcold treatments of winter wheat seedlings lead to a decrease in sensitivity of respirationand swelling of isolated mitochondria to CsA that shows again after oxidative stress followingcold stress. This fact allows supposing the change of mitochondrial pore propertiesunder stress conditions. ADP/ATP antiporter takes part in swelling mitochondriafrom winter wheat both in normal and in stress conditions. The short-term cold treatmentleads to an increase in contribution of uncoupling proteins to swelling mitochondriafrom winter wheat that is caused by increasing content of FFA in mitochondria. It is determinedthat in winter wheat mitochondria Ca-dependent and CsA-sensitive pore ispalmitate-dependent.
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Keywords
рermeability transition pore, uncoupling of oxidative phosphorylation, swelling, respiration, mitochondria, высокопроницаемая митохондриальная пора, разобщение окислительного фосфорилирования, набухание, дыхание, митохондрииAuthors
| Name | Organization | |
| Pavlovskaya Natalie S. | Siberian Institute of Plant Physiology and Biochemistryof Russian Academy of Sciences | pavnatser@mail.ru |
| Grabelnych Olga I. | Siberian Institute of Plant Physiology and Biochemistryof Russian Academy of Sciences | grolga@sifibr.ru |
| Pobezhimova Tamara P. | Siberian Institute of Plant Physiology and Biochemistryof Russian Academy of Sciences | pobezhimova@sifibr.irk.ru |
| Koroleva Nina A. | Siberian Institute of Plant Physiology and Biochemistryof Russian Academy of Sciences | grolga@sifibr.ru |
| Voinikov Viktor K. | Siberian Institute of Plant Physiology and Biochemistryof Russian Academy of Sciences | vvk@sifibr.irk.ru |
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