Fatty acid composition of mitochondrial membranes of pea seedlings under conditions of insufficient moistening and moderate cooling

Mitochondrial respiration after combined action of dehydration and low temperature in pea seedlings

“…We do not know what factors determine the higher sensitivity of NAD-dependent substrate oxidation to stresses compared to succinate oxidation. This may be associated with the modification of the lipid composition of mitochondrial membranes under stress conditions (Zhigacheva et al 2011). As noted above, the results obtained indicate the absence of any correlation between the membrane lipid peroxidation level and the extent of inhibition of respiratory activity immediately after treatments.…”

“…Jia et al (2016) showed that J-protein (AtDjB1), localized in mitochondrial complex I, is involved in the regulation of plant growth and development through ROS-mediated auxin signalling in Arabidopsis. In addition, we found that a stress-induced modifications of structure of mitochondrial membranes, namely a change in their fatty acid saturation under cold and drought, correlate with the observed changes in the functional activity of these organelles caused by malate oxidation inhibition (Zhigacheva et al 2011(Zhigacheva et al , 2013. Here, an elevation in the rate of malate oxidation in the presence of ADP (state 3) was observed only after 3-d recovery, especially after the combined stress (Table 1).…”

“…A similar approach to proper selection of environmental stress factors was used by Bandurska et al (2013) to study the action UV radiation and drought. Our previous investigation showed that dehydrating and moderately chilling etiolated pea seedlings show a marked change in the fatty acid composition of their mitochondrial membranes (Zhigacheva et al 2011). The purpose of the present work was to investigate the respiratory activity of mitochondria isolated from pea epicotyls after dehydration and moderately low temperature individually or in combination as well as after recovery under the control conditions.…”