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- Title
FATTY ACID COMPOSITION AND ACTIVITY OF THE MITOCHONDRIAL RESPIRATORY CHAIN COMPLEX I OF PEA SEEDLINGS UNDER WATER DEFICIT.
- Authors
Zhigacheva, Irina
- Abstract
We studied the effect of insufficient watering and plant growth regulator melaphen (melamine salt of bis(oxymethyl)-phosphonic acid) on the fatty acid composition and the energy of 5-day etiolated pea seedling mitochondria (Pisum sativum). It has been shown that insufficient watering results in alteration of fatty acid composition in mitochondrial membranes of seedlings. The ratio of the content of C18 -- unsaturated fatty acids to the stearic acid content decreases by 1.5 times. Significant changes are observed in the content of fatty acids with 20 carbon atoms: the ratio of unsaturated fatty acids to saturated fatty acids decreases by 3.3 times. The treatment with melaphen protects the unsaturated fatty acid from LPO and prevents thereby from changes in the fatty acid composition of seedling membranes in conditions of insufficient watering. The changes in fatty acid composition of mitochondrial membranes are in correlation with changes in maximum rates of NAD-dependent substrates oxidation (the Pearson's coefficient of correlation for C18 fatty acids is 0.676; for C20 fatty acids - 0.963).
- Subjects
PEA seeds; SEEDLINGS; SEED respiration; FATTY acid content of seeds; PLANT growth; PLANT water requirements; PLANT mitochondria
- Publication
Biologija, 2013, Vol 59, Issue 1, p133
- ISSN
1392-0146
- Publication type
Article