Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Characteristics of Seed and Germination of Rhododendron mucronulatum by Collection Dates and Germination Temperatures

채취 시기와 발아 온도에 따른 진달래의 종자 및 발아 특성

  • Choi, Kyu Seong (Plant Propagation and Reproduction Division, Baekdudaegan National Arboretum) ;
  • Song, Ki Seon (Forestry Knowledge Service Division, Korea Forestry Promotion Institute) ;
  • Koo, Da Eun (Department of Seed and Seedling Management, National Forest Seed and Variety Center) ;
  • Lee, Ha Na (Department of Forestry and Landscape Architecture, Konkuk University) ;
  • Sung, Hwan In (Department of Forestry and Landscape Architecture, Konkuk University) ;
  • Kim, Jong Jin (Department of Forestry and Landscape Architecture, Konkuk University)
  • 최규성 (국립백두대간수목원 식물양묘실) ;
  • 송기선 (한국임업진흥원 임업지식서비스단) ;
  • 구다은 (국립산림품종관리센터 종묘관리과) ;
  • 이하나 (건국대학교 산림조경학과) ;
  • 성환인 (건국대학교 산림조경학과) ;
  • 김종진 (건국대학교 산림조경학과)
  • Received : 2018.05.08
  • Accepted : 2018.07.14
  • Published : 2018.09.30
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Abstract

This study was carried out in order to secure basic data of seedling mass propagation technique of Rhododendron mucronulatum which is the native tree species of Korea by surveying the characteristics of its fruit and seed. The fruits were collected at Mt. Goryeo in Ganghwa-gun on different dates in 2013; August 26th, September 5th, September 12th, October 4th. The seed germination test was carried out at 5, 10, 15, 20, 25 and $30^{\circ}C$. Moisture content of the fruit was highest (54.5%) in the fruit collected on September 5th. Number of the seeds in a fruit was 91.3 to 116.3, regardless of the collection date. Seed length was highest ($1947.4{\mu}m$) in the seeds collected on October 4th and seed width was highest ($727.3{\mu}m$) in the seeds collected on September 12th. Germination rate of the seeds was highest at $25^{\circ}C$ regardless of the seed collection date, which showed the highest value(27.3%) in the seeds collected September 12th. Meanwhile, the seeds were not germinated not at all at 5, 10 and $30^{\circ}C$. $T_{50}$ and mean germination time of the seeds got shorter at the higher temperature. Germination uniformity got lower when the collection date got later. Germination speed of the seeds was fastest at $25^{\circ}C$. According to the results of this study, it seems that the appropriate time to collect fruit and seed is between September 12th and October 4th, and the appropriate temperature for the seed germination is $25^{\circ}C$.

본 연구는 우리나라 자생수종인 진달래(Rhododendron mucronulatum Turcz.)의 열매 및 종자의 특성을 조사하여 종자를 통한 대량번식 기술의 기초자료를 확보하고자 실시하였다. 진달래 열매는 강화군 고려산(435 m)에서 2013년 8월 26일, 9월 5일, 9월 12일, 10월 4일에 각각 채취하였다. 채취된 종자의 발아 온도 실험은 5, 10, 15, 20, 25, $30^{\circ}C$에서 실시하였다. 열매의 함수율은 2013년 9월 5일 채취 열매에서 54.5%로 가장 높았으며, 채취일자에 관계없이 열매의 종자개수는 91.3~116.3개였다. 종자의 길이는 10월 4일 채취 종자에서 $1947.4{\mu}m$, 폭은 9월 12일에서 $727.3{\mu}m$로 가장 컸다. 발아율은 종자의 채취시기에 관계없이 $25^{\circ}C$에서 높았으며, 9월 12일 채취한 종자에서 27.3%로 가장 높았다. 한편, 채취시기와 관계없이 5, 10 및 $30^{\circ}C$에서는 전혀 발아가 되지 않았다. $T_{50}$과 평균발아일수는 온도가 높아질수록 짧아지는 경향을 보였으며, 발아균일도는 채취시기가 늦을수록 낮아지는 경향을 보였다. 발아속도는 $25^{\circ}C$에서 가장 빠른 것으로 조사되었다. 본 실험의 결과를 종합해 볼 때 진달래 종자의 적정 채취시기는 9월 12일~10월 4일 경이며, 적정 발아 온도는 $25^{\circ}C$인 것으로 판단된다.

Keywords

References

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