Anomalous accumulation of selenium by genetically modified potato, stable to Colorado beetle

Although ordinary and genetically modified potatoes stable to Colorado beetles (CPB), Leptinotarsa decemlineata Say, are known to possess very small differences in chemical composition, nothing is known about selenium (Se) accumulation by these plants. Using a fluorimetric method of analysis, we have demonstrated extremely high Se accumulation in leaves of CPB-resistant potatoes (more than 1 mg kg−1 dry weight) and moderate accumulation levels of Se in tubers (1.39 times more than in ordinary plants). Leaves of genetically modified potatoes are shown to possess a decreased concentration of ascorbic acid (1.5 times less than controls) and slightly elevated levels of nitrates. The possibility of Se participation in the protection of genetically modified potatoes against CPB is discussed.