Journal of Ecology and Environment

한국생태학회 (The Ecological Society of Korea)
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Non-deep physiological dormancy in seeds of Euphorbia jolkinii Boiss. native to Korea

  • Oh, Hye Jin (Division of Plant Resources, Korea National Arboretum) ;
  • Shin, Un Seop (Division of Plant Resources, Korea National Arboretum) ;
  • Lee, Seung Youn (Division of Plant Resources, Korea National Arboretum) ;
  • Kim, Sang Yong (Division of Plant Resources, Korea National Arboretum) ;
  • Jeong, Mi Jin (Division of Plant Resources, Korea National Arboretum)
  • 투고 : 2021.09.07
  • 심사 : 2021.09.30
  • 발행 : 2021.12.31
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초록

Background: Euphorbia jolkinii Boiss. is a perennial species native to Jeju Island and the southern coastal area of Korea. Particularly on Jeju Island, the yellow flowers of E. jolkinii Boiss. have a high ornamental value because of their contrast with basalt. This study was conducted to investigate the effects of different temperatures (5, 15, 20, and 25 ℃) and gibberellic acid (GA3) concentrations (0, 10, 100, or 1000 mg/L) on seed dormancy and germination of E. jolkinii. In addition, we classified the seed dormancy type and compared types with those of other species in the same genus. Results: The number of seeds with viable embryos and endosperms was approximately 66%. The final germination percentages at 5, 15, 20, and 25 ℃ were 51.7%, 83.5%, 2.6%, and 0.0%, respectively. In GA3 concentration experiments, the final germination percentages of 0, 10, 100, and 1000 mg/L were 83.5%, 91.7%, 79.1%, and 83.4%, respectively, at 15 ℃ conditions, and 0.0%, 6.9%, 13.2%, and 27.3%, respectively, at 25 ℃. Conclusions: Germination improved at temperatures of 15 ℃ or lower. Furthermore, GA3 treatment effectively reduced germination times. Thus, the seeds of E. jolkinni were classified as having non-deep physiological dormancy.

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과제정보

This study was funded by the project "Development of Year-round Cultivation and Flowering Control Technique for Native Wild Flowers Commercialization and its Diversification of Utilization (KNA1-2-33, 17-8)" funded by the Korea National Arboretum.

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