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Korean Tricholoma matsutake Strains that Promote Mycorrhization and Growth of Pinus densiflora Seedlings

균근 형성과 소나무 유묘 생장이 우수한 송이 균주의 선발

  • Jeon, Sung-Min (Department of Life Science, Sangmyung University) ;
  • Ka, Kang-Hyeon (Division of Wood Chemistry and Microbiology, National Institute of Forest Science)
  • 전성민 (상명대학교 생명과학과) ;
  • 가강현 (국립산림과학원 화학미생물과)
  • Received : 2015.08.18
  • Accepted : 2016.09.12
  • Published : 2016.09.30

Abstract

Domestic and international production of Tricholoma matsutake has decreased owing to matsutake forests being left alone, host plant disease, forest fires, climate change, and so on. In order to identify strains that are suitable for the production of T. matsutake-inoculated seedlings, Pinus densiflora seedlings were inoculated with T. matsutake after in vitro rooting and mycorrhization was examined in the roots of T. matsutake-inoculated seedlings after 6 months. The mycorrhization rate was greater than 80% for 5 strains (NIFoS 421, 434, 1681, 1984, and 2001) out of 19 total strains. Seven strains (NIFoS 434, 441, 561, 562, 1016, 1807, and 1812) showed shoot/root ratios of less than 3.0 and had a seedling shoot biomass of 2.0 to 4.8 times higher than that of the root. Eight strains (NIFoS 441, 561, 562, 1016, 1807, 1812, 1984, and 2001) stimulated increases in shoot volume and three stains (NIFoS 441, 562, and 1812) promoted the growth of root biomass by mycorrhizal formation. In conclusion, 4 strains (NIFoS 434, 561, 1984, and 2001) out of 19 total strains tested showed higher mycorrhization rates and seedling growth than those of the other strains. We expect that the use of these four strains may contribute to T. matsutake-inoculated seedling production.

송이산의 방치, 기주식물의 질병, 산불, 기후변화 등 다양한 원인에 의해 국내외 송이 생산량이 감소하고 있어 송이균의 생태적 특성을 이용한 인공재배 기술 개발이 필요한 실정이다. 본 연구에서는 송이 접종묘 생산에 적합한 균주를 선발하기 위해 무균 배양병 내에서 소나무 유묘와 송이균 간의 외생균근 합성을 시도하였다. 송이 균근 형성률은 총 19개 균주 중 5개 균주(NIFoS 421, 434, 1681, 1984, 2001)가 80% 이상을 나타냈다. 7개 송이 균주(NIFoS 434, 441, 561, 562, 1016, 1807, 1812)는 평균 3.0 이하의 S/R ratio를 나타내었고, 소나무 유묘 지상부의 생물량이 지하부보다 2.0~4.8배 정도 높았다. 8개 균주(NIFoS 441, 561, 562, 1016, 1807, 1812, 1984, 2001)는 유묘의 지상부 부피 생장에, 3개 균주(NIFoS 441, 562, 1812)는 균근을 형성하면서 지하부 부피 생장을 돕는 것을 알 수 있었다. 결론적으로 시험균을 접종한 지 6개월 후, 총 19개 시험균 중 4 균주 (NIFoS 434, 561, 1984, 2001)는 타 균주들에 비해 송이균의 균근 형성력과 소나무 유묘 생장력이 우수한 것으로 나타나 송이 접종묘 제작에 있어 이들의 활용이 기대된다.

Keywords

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