Akademik Veri Yönetim Sistemi
Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi, cilt.42, sa.1, ss.73-79, 2025 (Hakemli Dergi)
Wall-spray cotoneaster (Cotoneaster horizontalis Decne.) seeds show deep dormancy and have a very low germination rate. Wall-spray cotoneaster seeds were dry cold stratiied (+4°C) either in the fruit or removed from the fruit for different periods (0, 30, 60, 90, 120 and 180 days) and then treated with different GA3 doses (0, 500, 1000 and 2000 ppm) and sown in peat medium in bottom heated (+24°C) trays in the greenhouse in the current study. The effects of GA3 treatment on germination (emergence) rate, living plant rate (%), plant height (cm), and leaf number were determined. The highest germination rate (35.00%) was obtained from the seeds treated with 2000 ppm GA3 without cold stratification. At room temperature, these control seeds were kept in fruit between October and May. The germination rate in the seeds treated with 1000 ppm GA3 after stratification in dry cold at +4°C for 60 days in the fruit was only 25.00%. The GA3 applications did not affect the germination rate of the seeds taken out of the fruit and stratified in dry-cold conditions for different periods.