Effect of 28-Homobrassinolide on Fatty Acid Metabolism During Germination of Crambe tatarica Under Salinity Stress

Abstract

To study the effect of brassinosteroids and salinity stress on the fatty acid metabolism in the seeds of oil plants, the authors analyzed the turnover of fatty acids in the seeds of Crambe tatarica under the mentioned conditions. The results of gas-liquid chromatography and mass-spectrometry demonstrated the decrease in the level of palmitic and linoleic fatty acids along with the increase in the level of oleic, eicosenoic, and docosenoic fatty acids in C. tatarica seeds in response to 28-homobrassinolide under salinity stress on some stages of seed germination. These regularities allowed for the assumption that 28-homobrassinolide promotes the stabilization of fatty acid composition of C. tatarica seeds, disrupted under salinity stress. This may indicate the possibility of modulating the activity or expression of desaturase genes and the enzymes of fatty acid oxidation in the anwer on brassinosteroids.