Glycoalkaloids content and protein composition in potato leaves after its damage by potato beetle

The authors determined the glycoalkaloids content and qualitative composition of water soluble protein in leaves of different species, subspecies and varieties of potato (Solanum genus) after damage of overground part of plants by potato beetles. It was shown, that glycoalkaloids content in potato leaves is associated with plant's protectability from leaves gnawing insects and after damages by potato beetles the glycoalkaloids content increases in a majority of investigated plants. The correlation between glycoalkaloids accumulation in damaged potato leaves and a function of neogenic protein with mass of 93 kD was considered. The authors propose to use as criterion for estimation of tolerance of potato plants to leaves gnawing insects the glycoalkaloids content in leaves and adrenalin content in feeding by them potato beetles.