Effect of Different Low Temperature Treatments on Breaking Idesia polycarpa Seed Dormancy among 12 Provenances
In order to explore the treatment effects of different low temperature on Idesia polycarpa seed dormancy breaking among different provenances, Idesia polycarpa seeds of 12 provenance were taken as material and treated for 0, 20, 40, 60 days respectively at 5℃, 10℃, 12℃, 15℃, then its germination was observed at 15/25℃. Results showed that the low temperature treatment could increase the seed germination rate and germination potential of Idesia polycarpa among different provenances in different levels, that would be 5.38%~5.38% increase in germination rate and 7%~48.96% increase in germination potential, with respective growth rates of 8.26%~114.18% and 37.49%~37.49%; the optimal treatment temperature and time among different provenances were different, the optimal treatment temperature were increased with the increase of latitude, low temperature of 10℃was better to break the seed dormancy for most of provenances, and 20 days of low temperature treatment could effectively break the seed dormancy, a long time low temperature treatment would inhibit the germination of seeds at higher temperatures, the mean time to germination of seeds would be prolonged at 15 ℃, and when the low temperature treatment time reached 60 days, the low temperature of 15 ℃ even had led to the Linan provenance seeds lost the ability to germinate.
Idesia polycarpalow temperature treatmentgermination rategermination potentialdormancy
国家科技期刊平台
NSTL
万方数据
维普
