한국환경복원기술학회지 (Journal of the Korean Society of Environmental Restoration Technology)

  • 제25권4호
  • /
  • Pages.1-13
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  • 2022
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  • 1229-3032(pISSN)
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  • 2733-5011(eISSN)
한국환경복원기술학회 (The Korea Society of Environmental Restoration Technology)
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차광처리가 벌개미취와 구절초의 생장 및 생리적 특성에 미치는 영향

Changes in Growth and Physiological Characteristics of Dendranthema zawadskii var. latiloba (Maxim.) Kitam. and Aster koraiensis Nakai by Shading Treatment

  • 김동학 (국립수목원 DMZ산림생물자원보전과) ;
  • 김영은 (국립수목원 DMZ산림생물자원보전과) ;
  • 김상준 (국립수목원 DMZ산림생물자원보전과)
  • 투고 : 2022.04.11
  • 심사 : 2022.07.08
  • 발행 : 2022.08.30
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초록

본 연구에서는 차광처리가 벌개미취와 구절초의 생리적 반응에 미치는 영향을 조사하기 위해, 대조구(0%)와 3개의 서로 다른 차광처리구(50%, 75%, 95%)를 설치하고 엽록소 함량, 생장 및 광합성 특성을 조사하였다. 벌개미취와 구절초 모두 차광수준이 높아질수록 낮은 광도에 적응하기 위해 광합성에 대한 빛의 흡수 효율이 높은 잎이 형성되었다. 또한 차광수준이 높아질수록 낮은 광도에서 광합성을 수행하기 위해 암호흡속도의 저하와 광보상점의 감소가 나타났고, 광합성 효율을 높이기 위해 엽록소 함량과 순양자수율이 증가하였다. 광합성 속도는 대조구에서 가장 높았고 차광수준이 높아질수록 저하하였다. 대조구에서는 강광에 의한 수분손실을 막기 위해 기공전도도와 증산속도가 감소하였다. 50% 차광처리구의 기공전도도와 증산속도는 대조구에 비해 높았으나, 75%와 95% 차광처리구에서는 더 낮게 나타나 광합성 효율이 떨어지는 것으로 나타났다. 수분이용효율 또한 광합성속도와 유사한 경향으로 나타났고, 차광수준에 따라서 저하하는 것으로 나타났다. 벌개미취는 전천광보다 낮은 광 조건에서 생육할 시 광합성 능력이 저하하는 것으로 보이며, 구절초의 경우 50% 차광처리까지는 광합성에 큰 영향을 끼치지 않는 것으로 판단된다. 벌개미취와 구절초는 광을 제한하여 차광 상태를 지속하게 되면 생육에 불리할 것으로 판단된다. 이러한 벌개미취와 구절초의 생육특성은 상층임관이 존재하지 않은 DMZ 불모지와 같은 환경에 도입시키기 적합할 것으로 판단된다.

This study was conducted to investigate the chlorophyll content, photosynthetic characteristics, and growth characteristics of Aster koraiensis and Dendranthema zawadskii var. latiloba according to shading treatment. A. koraiensis and D. zawadskii grew in four different shading treatment plots (0%, 50%, 75% and 95% of full sunlight) for experiments. It was found that as the shading level increased, the total chlorophyll content increased and dark respiration decreased in both A. koraiensis and D. zawadskii, indicating that A. koraiensis and D. zawadskii increase the utilization efficiency for photosynthesis under low light conditions. In addition, as the shading level increased, the net apparent quantum yield increased, resulting in the highest in the 95% shading plot, but the highest photosynthetic rate, water use efficiency, and leaf mass per area (LMA) were shown in the control group than in the shading treatments. The results showed that A. koraiensis and D. zawadskii are heliophytes showing plasticity to light, and if the light is restricted to continue to shade, it may be detrimental to growth. For healthy growth, it is considered suitable to grow A. koraiensis under full light conditions, and D. zawadskii under the light condition that blocks 0-50% of full sunlight.

키워드

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