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Comparison of Germination Characteristics and Various Pre-treatment Methods for Enhancing Germination on Zoysiagrass

한국잔디 종자의 발아특성과 발아율 향상을 위한 다양한 전처리 방법의 비교

  • Han, Jeong-Ji (Southern Forest Resources Research Center, Korea Forest Research Institute) ;
  • Lee, Kwang-Soo (Southern Forest Resources Research Center, Korea Forest Research Institute) ;
  • Park, Yong-Bae (Southern Forest Resources Research Center, Korea Forest Research Institute) ;
  • Yang, Geun-Mo (Department of Green Landscape Architecture Science, Dankook Univ.) ;
  • Bae, Eun-Ji (Southern Forest Resources Research Center, Korea Forest Research Institute)
  • 한정지 (국립산림과학원 남부산림자원연구소) ;
  • 이광수 (국립산림과학원 남부산림자원연구소) ;
  • 박용배 (국립산림과학원 남부산림자원연구소) ;
  • 양근모 (단국대학교 녹지조경학과) ;
  • 배은지 (국립산림과학원 남부산림자원연구소)
  • Received : 2014.08.28
  • Accepted : 2014.09.17
  • Published : 2014.09.30

Abstract

Zoysiagrass seeds had low germination or lack of germination uniformity under natural condition. To improve the final germination percentage of zoysiagrass seeds, we investigated the methods of proper pre-treatment to enhance germination rate of zoysiagrass. Seeds were subjected to the testa scarification and four types of seed priming methods, namely, hydro priming (distilled water), osmotic priming (polyethylene glycol -0.5 MPa, -1.0MPa, -2.0 MPa), halo priming (Potassium nitrate 100 mM, 200 mM, 400 mM), and solid matrix priming (seed : microcel-E : distilled water = 4:1:8) with and without 25% KOH treatment in the testa. The scarification improved the germination rate and reduced the germination time. Osmotic priming (PEG -0.5 MPa) with scarification were significantly increased the seed germination rate and decreased MGT, and $T_{50}$. Seed germination rate obtained by osmotic priming (PEG -0.5MPa) with scarification increased above 60% in comparison with natural condition. Conclusively, scarified and primed zoysiagrass seed germinated more rapidly and uniformly in the study. The present results suggested that PEG priming treatment with KOH treatment prior to sowing could improve germination percentage, and this method makes us establish the early zoysiagrasses in the field.

들잔디 종자의 발아를 향상시키기 위해서, 적정 종자 전처리 방법을 조사하였다. 종자들은 종피 연화 및 4가지 프라이밍 처리, 즉, 종피에 KOH 처리 유무에 따른 Hydro 프라이밍(증류수), Osmotic 프라이밍(폴리에틸렌 글리콜 -0.5MPa, -1.0MPa, -2.0MPa), Halo 프라이밍(질산칼륨 100 mM, 200 mM, 400 mM)과 Solid matrix 프라이밍(종자:microcel-E:증류수 = 4:1:8) 방법을 조합하였다. 종피 연화는 발아율을 향상시키고 발아소요시간을 단축시켰다. 종피 연화 처리 후 Osmotic 프라이밍(PEG -0.5 MPa)에서 발아율이 유의적으로 증가하였고, MGT, $T_{50}$이 감소하였다. 종자 발아율은 자연상태와 비교하여 60% 이상 증가시켰다. 결론적으로, 종피연화와 프라이밍 처리한 잔디종자는 더 빠르고 균일하게 발아를 하였다. 현 연구를 통해 KOH처리와 PEG 프라이밍 처리는 파종 시 발아율을 향상 시켜 초기 잔디 조성을 빠르게 할 수 있을 것으로 기대된다.

Keywords

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