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- Title
Winter wheat mitochondria functioning in vitro in the presence of calcium ions and stress uncoupling CSP310 protein.
- Authors
Kolesnichenko, A. V.; Grabel'nykh, O. I.; Pobezhimova, T. P.; Turchaninova, V. V.; Voinikov, V. K.
- Abstract
The effects of different Ca2+ concentrations on winter wheat ( Triticum aestivum L.) functioning and cytochrome c release after organelle incubation with cold-shock protein with a mol. wt of 310 kD or after cold shock were studied. Low (1–5 μM) and high (25–50 μM) Ca2+ concentrations inhibited mitochondrial respiration in control seedlings, whereas 10 μM Ca2+ enhanced respiration in state 4 and reduced indices characterizing coupling (respiratory control (RC) and ADP: O ratio). At concentrations of 6–20 and 50 μM, Ca2+ ions suppressed CSP310 uncoupling effect, which reduced the rate of respiration and an increase in the RC and ADP: O ratio. Low-temperature stress and exogenous CSP310 induced cytochrome c leakage from winter wheat mitochondria both in the absence of Ca2+ and in the presence of its low concentrations.
- Subjects
WHEAT; WINTER wheat; MITOCHONDRIA; ORGANELLES; CYTOCHROME c; PHOSPHORYLATION; PLANT physiology
- Publication
Russian Journal of Plant Physiology, 2006, Vol 53, Issue 3, p340
- ISSN
1021-4437
- Publication type
Article
- DOI
10.1134/S1021443706030083