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계절에 따른 국내 자생 꼬리겨우살이, 겨우살이 및 기주목의 광합성 특성과 엽록소 함량

Seasonal Variation in Photosynthetic Characteristics and Chlorophyll Content of the Loranthus tanakae, Viscum album var. coloratum and its Hosts in Korea

  • 이수광 (국립수목원 유용식물증식센터) ;
  • 이성한 (서울시립대학교 환경원예학과) ;
  • 우수영 (서울시립대학교 환경원예학과) ;
  • 강호덕 (동국대학교 바이오환경과학과)
  • Lee, Sugwang (Useful Plant Resources Center, Korea National Arboretum of the Korea Forest Service) ;
  • Lee, Seong Han (Department of Environmental Horticulture, The University of Seoul) ;
  • Woo, Su Young (Department of Environmental Horticulture, The University of Seoul) ;
  • Kang, Hoduck (Department of Biological & Environmental Science, Dongguk University)
  • 투고 : 2014.01.14
  • 심사 : 2014.12.30
  • 발행 : 2015.03.31

초록

본 연구는 희귀기생식물인 꼬리겨우살이(Loranthus tanakae)의 보전을 위한 기초자료 제공을 목적으로 꼬리겨우살이와 겨우살이(Viscum album var. coloratum)를 대상으로 계절에 따라 자생지에서 어떠한 생리특성을 나타내고, 기주목과는 어떠한 차이를 보이는지, 광합성 속도, 증산 속도, 수분이용효율, 엽록소 형광반응 및 엽록소 함량을 조사함으로써 살펴보았다. 꼬리겨우살이의 최대 광합성 속도는 6월 중순 광량 $941{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$일 때 $9.36{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, 최대 증산 속도는 7월 하순 광량 $1,596{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$일 때 $5.06{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 나타났다. 겨우살이의 최대 광합성 속도는 9월 중순 광량 $418{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$일 때 $6.51{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, 최대 증산 속도는 9월 초 광량 $1,735{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ 일 때 $3.91{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 나타났다. 겨우살이는 기주목과 꼬리겨우살이 모두 낙엽이 떨어진 11월에도 광합성이 가능하였다. 특이하게 꼬리겨우살이의 증산 속도가 기주목보다 항상 높은 값을 유지하였다. 최대 엽록소 함량(엽록소 a+b)은 꼬리겨우살이가 7월 하순 $8.23mg{\cdot}g^{-1}$, 겨우살이는 6월 중순 $10.27mg{\cdot}g^{-1}$로 나타났으며, 엽록소 a/b 비율은 계절에 따라 꼬리겨우살이 1.7~3.7, 겨우살이 1.1~4.5로 큰 차이를 보였다.

We investigated seasonal variation in photosynthetic characteristics and chlorophyll content of the Loranthus tanakae, Viscum album var. coloratum and its hosts in Korea. The maximum photosynthesis and transpiration rate of L. tanakae were $9.36{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ at $941{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PAR (photosynthetically active radiation) in June, $5.06{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ at $1,596{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PAR in July, respectively. The maximum photosynthesis and transpiration rate of V. album var. coloratum were $6.51{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ at $418{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PAR in Autumn, $3.91{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ at $1,735{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PAR in Autumn, respectively. V. album var. coloratum was able to conduct photosynthesis in November whereas its host and L. tanakae were not able to conduct photosynthesis. Especially transpiration rate of L. tanakae were always higher than its host and V. album var. coloratum. The chlorophyll a+b contents of L. tanakae was $8.23mg{\cdot}g^{-1}$ in July, V. album var. coloratum was $10.27mg{\cdot}g^{-1}$ in June, and chlorophyll a/b ratio of L. tanakae was 1.7~3.7, V. album var. coloratum was 1.1~4.5, depend on season.

키워드

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