Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Germination Characteristics in Seeds of Broussonetia kazinoki Siebold ex Siebold & Zucc (Moraceae) Native to East Asia

동아시아 특산식물 애기닥나무 Broussonetia kazinoki Siebold ex Siebold & Zucc (Moreaceae) 종자의 발아특성

  • Kim, Gun Mo (Department of Horticulture and Breeding, Andong National University) ;
  • Chung, Jae Min (Division of Plant Resources, Korea National Arboretum) ;
  • Jung, Ji Young (Division of Plant Resources, Korea National Arboretum) ;
  • Choi, Hyeok Jae (Department of Biology and Chemistry, Changwon National University) ;
  • Lee, Seung Youn (Department of Horticulture and Breeding, Andong National University)
  • 김건모 (국립안동대학교 원예육종학과) ;
  • 정재민 (국립수목원 식물자원연구과) ;
  • 정지영 (국립수목원 식물자원연구과) ;
  • 최혁재 (국립창원대학교 생물.화학융합학부) ;
  • 이승연 (국립안동대학교 원예육종학과)
  • Received : 2021.07.28
  • Accepted : 2021.10.19
  • Published : 2022.02.01
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Abstract

This research was conducted to develop a seed propagation protocol for the use of Broussonetia kazinoki Siebold ex Siebold & Zucc, which native to East Asia. Light and temperature conditions, GA3 treatment, and low-temperature stratification were performed to evaluate the germination characteristics. The germination percentage at 4, 15/6, 20/10 and 25/15℃ was 0, 42. 5, 44. 4 and 91.7%, respectively. Thus, the optimal germination temperature of the B. kazinoki seeds was 25/15℃. Although germination was delayed by relatively low temperature conditions, GA3 treatment allowed for increased germination rates even under the low temperature conditions. Cold stratification reduced time to germination. Relatively low germination percentages at 20/10℃ and 15/6℃ indicated that the seeds had been under the state of conditional dormancy. Through this study, B. kazinoki seeds have conditional dormancy because they can be germinated through GA3 treatment even under relatively low temperature conditions and it is judged that it will support the commercial propagation practice in the future.

본 연구는 동아시아 특산식물 애기닥나무의 자원식물로서 활용을 위한 대량증식법 개발을 위해 실시하였다. 종자의 발아특성을 알아보기 위해 광·온도조건, GA3 처리, 저온층적처리를 실시하였다. 온도조건 실험에서 4, 15/6, 20/10, 25/15℃에서 발아율은 각각 0, 42.5, 44.4, 91.7%였다. 따라서 애기닥나무 종자의 발아 최적온도는 25/15℃였다. 온도조건에 따라 발아가 제한되었지만, GA3 처리를 통해 상대적으로 낮은 온도조건에서도 발아율을 높일 수 있었다. 저온층적처리를 통해 발아소요일수를 단축할 수 있었으며. 이를 통해 애기닥나무 종자를 conditional dormancy 유형으로 분류하였다. 본 연구결과를 통하여 적정 발아 온도조건은 25/15℃이며, 상대적으로 낮은 온도조건에서도 GA3처리로 종자기반 대량증식이 가능하며, 향후 산업적인 활용에 도움이 될 것이라 판단된다.

Keywords

Acknowledgement

본 연구는 국립수목원 '유용자원식물 대량증식법 개발' 과제와 KIST '개방형 연구사업 (금강초롱프로그램, 2E30650)'의 지원에 의해 수행되었음.

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