The effects of some treatments on germination ofTilia tomentosa and Tilia rubra subsp. caucasica deeds

This study was carried out to determine the effects of some pre-treatments including cold stratification for 6 months, warm stratification for 2 months and cold stratification for 4 months, sowing semi-mature seeds at the end of August with pericap and without pericarp and autumn sowing unde both open field and greenhose conditions on seed germination and to investigate how to overcome dormancy of Tiliatomentosa and Tiliarubra subsp. caucasica seeds. The seeds were sown at at 24±1°C in the greenhouse and under open field conditions. The statistical approach was a randomized complete block design with three replications. Germinated seeds were observed periodically during 90 days to determine germination percentages. The highest germination percentages of Tiliarubra subsp. caucasicawere obtained from the seeds used6-month cold stratification and sown under both open field and greenhouse conditionswith 45.2% and 45.6%, respectively. On the other hand, the highest germination percentage (11.8%) for Tilia tomentosa were obtained from the the seeds cold strafied for 6 months which were sown under open field conditions. It can be said that the effect of cold stratification pre-treatments on germination of the seeds had positively. Keywords:Tilia tomentosa, Tilia rubra subsp. caucasica, germination percentage