Non-Deep Physiological Dormancy in Seed and Germination Requirements of Lysimachia coreana Nakai

Horticulturae

Saeng Geul Baek¹  Su Young Woo¹  Myeong Ja Kwak¹  Mi Hyun Lee²  Jin Hyun Im²  Cho Hee Park²  Chae Sun Na² 

[1] Department of Environmental Horticulture, University of Seoul, Seoul 02504, Korea;Seed Conservation Research Division, National Arboretum Baekdudaegan, Gyeongsangbuk-do 36209, Korea;

关键词: cold stratification;    gibberellic acid (GA₃);    germination rate (GR);    Lysimachia;    seed dormancy;    warm stratification;   

DOI  :  10.3390/horticulturae7110490

来源: DOAJ

【 摘 要 】

This study aimed to determine the type of seed dormancy and to identify a suitable method of dormancy-breaking for an efficient seed viability test of Lysimachia coreana Nakai. To confirm the effect of gibberellic acid (GA₃) on seed germination at different temperatures, germination tests were conducted at 5, 15, 20, 25, 20/10, and 25/15 °C (12/12 h, light/dark), using 1% agar with 100, 250, and 500 mg·L⁻¹ GA₃. Seeds were also stratified at 5 and 25/15 °C for 6 and 9 weeks, respectively, and then germinated at the same temperature. Seeds treated with GA₃ demonstrated an increased germination rate (GR) at all temperatures except 5 °C. The highest GR was 82.0% at 25/15 °C and 250 mg·L⁻¹ GA₃ (4.8 times higher than the control (14.0%)). Additionally, GR increased after cold stratification, whereas seeds did not germinate after warm stratification at all temperatures. After cold stratification, the highest GR was 56.0% at 25/15 °C, which was lower than the GR observed after GA₃ treatment. We hypothesized that L. coreana seeds have a non-deep physiological dormancy and concluded that 250 mg·L⁻¹ GA₃ treatment is more effective than cold stratification (9 weeks) for L. coreana seed-dormancy-breaking.

【 授权许可】

Unknown