Home – Home – Jornals – Contemporary Problems of Ecology 2015 number 4

Seed germination of 14 species (22 populations) of the section Violidum , subgenus Nomimium , genus Viola in different ecological groups was studied. The conditions for germination of seeds, germinating ability, germination energy, intensity of germination energy, longevity of seeds and profitability of their introduction, and the period when the seeds’ germinating ability decreased by 50 % (Р₅₀) were determined. The seeds of most species of xeromesophytes and mesophytes massively germinated at + 23–25 °C within the period of 10 days. For other species of these ecological groups cold stratification was favourable. The hygromesophytes had prolonged seed germination (up to 2 months). The petrophyte seeds had shallow physiological dormancy (B1). Seeds of other species as a rule were non-dormant.