Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Seed Germination Response to Temperature, Cold Stratification Period, and Gibberellin Treatment in Spiraea fritschiana

  • Kim, Hyun Jin (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University) ;
  • Lee, Ki Cheol (Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) ;
  • Kim, Hyun Jin (Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) ;
  • Kim, Yoon Jin (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University)
  • Received : 2015.10.24
  • Accepted : 2016.07.13
  • Published : 2016.08.31
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Abstract

To improve the germination of Spiraea fritschiana seeds for mass propagation, we evaluated the effect of a range of temperatures, cold stratification periods, and gibberellic acid ($GA_3$) treatments on three germination characteristics. Final germination percentage (FGP) increased as the temperature for seed germination increased, up to $30^{\circ}C$, while the mean germination time (MGT) and the mean number of days to 30% germination ($T_{30}$) decreased when seeds were germinated at $25-30^{\circ}C$. The optimum germination temperature of S. fritschiana seeds is approximately $30^{\circ}C$ considering FGP, MGT, and $T_{30}$ together. FGP increased with the duration of cold stratification up to a period of 6 weeks, but declined after 8 weeks of cold stratification, as prolonged cold stratification can induce dormancy with a resultant decline in germination. Pretreatment with 6-8 weeks of cold stratification or soaking seeds in distilled water or $500mg{\cdot}L^{-1}$ $GA_3$ for 24 h accelerated and increased the germination of S. fritschiana seeds, regardless of temperature. However, further study might be required to evaluate the effect of $GA_3$ concentrations lower than $500mg{\cdot}L^{-1}$ on the promotion of germination in S. fritschiana seeds.

Keywords

References

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