Seed quality indeces of Tilia under environment pollution conditions caused by Prydniprovska TPP emissions, Dnipro city

The problem of full seed is one of the major issues of reproductive biology of plants. The gap between potential and real seed production, which is constantly observed in nature, becomes dramatically evident in terms of the extreme growth terms. This issue became relevantin connection with the growth of environmental pollution caused by technogenic influence. This paper discusses the research results obtained while analysing the effect that emissions, produced by Prydniprovska TPP (Dnipro, Ukraine), have on Tilia genus seed quality indices. The research objects were Tilia platyphyllos Scop., T. europaea L. and T. cordata Mill. The samples were taken in October of 2016 in the two sites of the monitoring coverage: the test area was the tree plantation adjacent to the Prydniprovska TPP (the main toxic substanceswere NOx, SO2, CO, solid impurities) in the city of Dnipro, Ukraine; the reference area was the Botanical Garden of Oles’ Honchar Dnipropetrovsk National University.In terms of the industrial site, there is the decrease of seed viability in all the examined representatives of Tilia genus. Moreover, the indices of the seed fullness and 1,000 seed weight went down in the two species (T. cordata and T. platyphyllos). The research demonstrated the difference in the sensitivity of the reproductive systems of the research objects to technogenic exposure. Thus, T. cordata seeds appear to be the most vulnerable, while the seeds of T. platyphyllos and T. europaea remain the most tolerant to it. Recommendations are suggested to use the species of Tilia genus in planting of greenery in the inductrial zonez of the steppe Pryniprovya.