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2007 Fiscal Year Final Research Report Summary

Germination phenoology and mechanism of seed dormancy on northern landscaping plants that need two years from seed dispersal to germination

Research Project

Project/Area Number 17580019
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Horticulture/Landscape architecture
Research InstitutionHokkaido University

Principal Investigator

KONDO Tetsuya  Hokkaido University, Research Faculty of Agriculture, Professor (10153727)

Project Period (FY) 2005 – 2007
KeywordsCardiocrinum cordatum var. glehnii / seed dormancy / morphophysiological dormancy / Temperature requirement / Embryo / Storage / Sowing time / Tri11ium camtschatcense
Research Abstract

In northern part of Japan, there are several aesthetic native plant species and some of them have the seeds which need two winters from seed dispersal to cotyledon emergence. The goal of the study was to reveal the germination ecophysiology and seed dormancy mechanism of such seeds.
Seeds of Cardiocrinum cordatum var. glehnii have underdeveloped embryo when seeds are dispersed. It took 18 mo from seeds dispersal to radicle emergence and 19 mo for cotyledon emergence in nature and they have deep simple morphophysiological dormancy. However, temperature sequence 25/15℃ (60d)→15/5℃ (30d) →0℃ (120d) →15/5℃ using incubator shortened the period from sowing seeds to radide emergence to 7 or 8 mo. Seeds collected in autumn, stored at 5℃, and sown by June in the following year germinated more than 88% in the next spring. On the other hand, seeds sown in August in the following year or later germinated to low percentages in the next spring. Seeds of C. cordatum var. glehnii need temperature sequence high-moderate-low-moderate for embryo growth and germination, however, seeds sown in August or later were not exposed to enough period of high temperature and then only a part of them germinated. These results are the first report on seed dormancy of genus Cardiocrinum in the world and contribute to the field of seed ecophysiology; further they are valuable information for the artificial propagation.
Seeds of Trillium camtschatcense also have small and underdeveloped embryo. Embryos in the seeds dispersed in late July grew during the next summer and radicles emerged soon after the embryo growth. Cotyledon emerged in the spring after winters. temperature treatments were applied to the seeds to determine the temperature requirement for germination. However, we still did not find the effective temperature treatment.

  • Research Products

    (6 results)

All 2007 2006

All Journal Article (4 results) (of which Peer Reviewed: 2 results) Presentation (2 results)

  • [Journal Article] Effects of temperature, light, storage conditions, sowing time, and burial depth on the seed germination of Cardiocrinum cordatum var. glehnii (Liliaceae)2007

    • Author(s)
      Tetsuya Konodo
    • Journal Title

      Landscape and Ecological Engineering 3

      Pages: 89-97

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Effects of temperature, light, storage conditions, sowing time, and burial depth on the seed germination of Cardiocrinum cordatum var. glehnii (Liliaceae)2007

    • Author(s)
      Tetsuya Konodo and Chihiro Sato
    • Journal Title

      Landscape and Ecological Engineering 3

      Pages: 89-97

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Post-dispersal embryo development, germination phenology, and seed dormancy in Cardiocrinum cordatum var. glehnii (Liliaceae s. str.), a perennial herb of the broadleaved deciduous forest in Janan2006

    • Author(s)
      Tetsuya Konodo
    • Journal Title

      American Journal of Botany 93

      Pages: 849-859

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Baskin Post-dispersal embryo development, germination phenology, and seed dormancy in Cardiocrinum cordatum var. glehnii (Liliaceaes. str.), a perennial herb of the broadleaved deciduous forest in Japan.2006

    • Author(s)
      Tetsuya Konodo, Chihiro Sato, Jerry. M. Baskin, and Carol. C.
    • Journal Title

      American Journal of Botany 93

      Pages: 849-859

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Morphophysiological dormancy and temperature and light requirements for radicle emergence of Trillium camtschatcense seeds,2007

    • Author(s)
      Tetsuya Konodo
    • Organizer
      Seed ecology II The 2nd international society for seed science meeting on seeds and the environment
    • Place of Presentation
      Perth, The University of Western Australia
    • Year and Date
      2007-09-10
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Morphophysiological dormancy and temperature and light requirements for radicle emergence of Trillium camtschatcense seeds2007

    • Author(s)
      T. Kondo, K. Yamadal, M. Mikubo, J.L. Walck and S.N. Hidayati
    • Organizer
      Seed ecology II The 2^<nd> international society for seed science meeting on seeds and the environment
    • Place of Presentation
      Perth Western Australia, 45, The University of Western Australia
    • Year and Date
      2007-09-10
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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