한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

  • 제52권4호
  • /
  • Pages.363-369
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  • 2007
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  • 0252-9777(pISSN)
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  • 2287-8432(eISSN)
한국작물학회 (The Korean Society of Crop Science)
권호 표지

Changes of Seed Quality of Chinese Milk Vetch(Astragalus sinicus L.) During Seed Developmental Stages

  • Na, Chae-Sun (College of Life Sciences and Biotechnology, Korea University) ;
  • Lee, Yong-Ho (College of Life Sciences and Biotechnology, Korea University) ;
  • Hong, Sun-Hee (College of Life Sciences and Biotechnology, Korea University) ;
  • Jang, Cheol-Seong (College of Life Sciences and Biotechnology, Korea University) ;
  • Kang, Byeung-Hoa (College of Life Sciences and Biotechnology, Korea University) ;
  • Lee, Jong-Ki (National Institute of Crop Science, R.D.A.) ;
  • Kim, Tae-Ho (National Institute of Agricultural Biotechnology, R.D.A.) ;
  • Kim, Wook (College of Life Sciences and Biotechnology, Korea University)
  • 발행 : 2007.12.31
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초록

The objective of this study was to investigate the variation of Chinese milk vetch(Astragalus sinicus L.; CMV) seed quality after flowering. We tagged individual open flowers of CMV at the day of maximum flowering(11 May) in Seoul, Korea. Seed samples were harvested serially at 15, 20, 25 and 30 days after flowering(DAF). To compare with dried seeds, non-dried seeds were tested immediately after harvest and the remaining seeds were placed at room temperature for 4 weeks. Seed length, 1000 seed weight, moisture content, germination rate(GR), mean germination time(MGT), germination speed(GS), germination performance index(GPI) and physical dormancy rate(PDR) were investigated. Seed length increased to 2.6 mm and 1000 seed weight reached up to 2.2 g until 25 DAF. Seed moisture content dramatically decreased from 20 to 25 DAF. Moisture content of non-dried seed(7.5%) was similar to that of dried seed(5.5%) at 25 DAF. The rate of seed viability reached up to 94% at 25 DAF. In case of dried seed, GR increased up to 39% at 25 DAF whereas GR of non-dried seed varied from 5 to 10%. GS and GPI of dried seed were significantly higher than those of non-dried seed since 25 DAF. PDR of dried seed has decreased since 20 DAF, whereas PDR of non-dried seed has increased. GR, GS and GPI increased as PDR decreased. Our results evidenced that PDR might be one of major factor in variation of seed quality, of which development was completed at 25 DAF.

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