Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Dormancy type and Germination Characteristics of Seeds of Lonicera chrytsantha Turcz. Ex Ledeb (Caprifoliaceae)

각시괴불나무 종자의 휴면유형과 발아특성

  • Park, Hyung Bin (Division of Plant Resources, Korea National Arboretum) ;
  • Ko, Chung Ho (Division of Plant Resources, Korea National Arboretum) ;
  • Kim, Sang Yong (Division of Plant Resources, Korea National Arboretum) ;
  • Lee, Ki Cheol (Division of Plant Resources, Korea National Arboretum) ;
  • Kim, Jae Hyeun (Division of Plant Resources, Korea National Arboretum) ;
  • Chung, Jae Min (Division of Plant Resources, Korea National Arboretum)
  • 박형빈 (국립수목원 식물자원연구과) ;
  • 고충호 (국립수목원 식물자원연구과) ;
  • 김상용 (국립수목원 식물자원연구과) ;
  • 이기철 (국립수목원 식물자원연구과) ;
  • 김재현 (국립수목원 식물자원연구과) ;
  • 정재민 (국립수목원 식물자원연구과)
  • Received : 2019.05.17
  • Accepted : 2019.07.22
  • Published : 2019.10.31
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Abstract

This study was conducted to investigate seed dormancy type and germination characteristics of Lonicera chrysantha. In imbibition test, the seeds imbibed water readily. Therefore, the seeds did not have physical dormancy (PY). The seeds have undeveloped embryo at seed dispersal and, then the E:S ratio (embryo/seed ratio) increased more than about 46% just before germination. In temperature experiments (5, 15, 20 and $25^{\circ}C$), the seeds did not germinate during incubation at $5^{\circ}C$. At $20^{\circ}C$, the seeds started to germinate from a week after sowing and the final germination was 86.7% at 2 weeks after sowing. At $15^{\circ}C$, the seeds started to germinate at 2 weeks and the final germination rate was 75.0% at 4 weeks after sowing. At $25^{\circ}C$, the seeds started to germinate at a week and the final germination rate was 48.3% at 19 weeks after sowing. Consequently, Optimum temperature of germination is $20^{\circ}C$ that shown highest final germination rate and shortest mean germination time. The seeds germinated all temperature treatments within 4 weeks except to $5^{\circ}C$. Therefore, it is concluded that seeds of L. chrysantha have only morphological dormancy (MD).

본 연구는 각시괴불나무 종자의 휴면유형과 발아특성을 구명하기 위하여 수행되었다. 수분흡수 실험결과, 각시괴불나무 종자는 수분흡수가 원활히 이루어졌다. 따라서, 물리적 휴면은 가지지 않는 것으로 판단된다. 각시괴불나무 종자는 탈리 시점에 미숙배를 가지고 있으며, 발아직전까지 배/종자 비율이 약 46% 증가하였다. 온도실험결과, $5^{\circ}C$에서는 발아가 전혀 이루어지지 않았다. $20^{\circ}C$에서는 파종 후 1주부터 발아가 시작되었으며 최종 발아율은 2주차에 86.7%였다. $15^{\circ}C$에서는 파종 후 2주부터 발아를 시작하였으며, 최종 발아율은 4주차에 75.0%였다. $25^{\circ}C$에서 파종 후 1주부터 발아가 시작되었으며 최종 발아율은 19주차에 48.3%였다. 결론적으로, 각시괴불나무 종자의 발아를 위한 최적온도는 가장 높은 최종 발아율과 가장 짧은 평균 발아 일수를 나타낸 $20^{\circ}C$이다. 각시괴불나무 종자는 $5^{\circ}C$를 제외한 모든 온도에서 4주 이내에 발아하였기 때문에 생리적 휴면은 관찰되지 않았다. 따라서, 각시괴불나무 종자는 오직 형태적 휴면만을 가지는 것으로 판단되었다.

Keywords

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