Pollen teratomorphism of Syringa josikaea Jacq. in urban areas of the Russian arctic

Research results of the palynological analysis of Syringa josikaea Jacq. pollen in conditions of the arctic climate of Murmansk city are presented. The size of pollen grains found on the densely populated territory is much lower than in other regions of Russia and Europe. 14 types of teratomorph of S. josikaea pollen grains were revealed. According to our research the level of teratomorphism varied from 7 to 31,3 % in 2014 and from 8,5 to 36,1 % in 2015. These indicators speak of the presence of generative processes in microsporogenesis and point to the adverse environmental conditions.