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상이한 피음조건에서 자라는 3개 활엽수의 생리적 반응
Physiological Responses of the Three Deciduous Hardwood Seedlings Growing Under Different Shade Treatment Regimes

김길남    (충남대학교 산림자원학   ); 조민석    (국립산림과학원 산림생산기술연구소   ); 이수원    (국립산림과학원 산림생산기술연구소  );
  • 초록

    본 연구에서는 자작나무, 개벚나무, 함박꽃나무를 대상으로 피음수준을 전광 처리구(상대투광율; 100%), 약피음 처리구(상대투광율; 64~73%), 보통피음 처리구 (상대투광율; 35~42%), 강피음 처리구(상대투광율; 9~16%)로 달리하여 이들의 내음성 및 광 요구도에 관한 광합성 특성과 엽록소 형광 반응, 엽록소 함량을 조사 분석하였다. 세 수종의 생육시기별 광합성 능력은 7월과 9월에 가장 높은 값을 나타냈으며, 자작나무와 개벚나무에 비해 함박꽃나무의 광합성 능력이 매우 낮았다. 순양자수율 또한 광합성 능력과 같은 경향을 나타냈다. 수목의내음성 수준을 판단할 수 있는 광보상점은 함박꽃나무가 자작나무와 개벚나무에 비해 강한 내음성을 나타냈다. 피음 처리별 광합성 능력에서는 자작나무는 전광 처리구에서 가장 우수하였으며, 개벚나무는 시기별 차이는 있지만 강피음 처리구를 제외한 나머지 세 처리구에서 비슷한 광합성 능력을 보였다. 함박꽃나무는 보 통피음 처리구에서 가장 좋은 광합성 능력을 나타냈다. 피음 처리별 엽록소 형광 반응 특성에서 광화학 반응에 대한 순양자수율의 최대치인 광화학효율( $F_v/F_m$ )은 자 작나무의 경우 전광 처리구에서 가장 우수하였으며 피음 수준이 증가할수록 감소하였다. 개벚나무는 약피음 처리구에서 가장 우수한 광화학효율을 보였으며, 함박꽃 나무는 보통피음 처리구에서 가장 양호한 광화학효율을 나타냈다. 특히 함박꽃나무는 다른 두 수종과는 달리 전광 처리구에서 가장 낮은 값을 나타냈다. 이 결과는 세 수종의 피음 수준별 광합성 능력과 같은 결과를 보였다. 실험대상 수종들의 총 엽록소 함량은 세 수종 모두 피음 수준이 증가할수록 높아지는 경향을 보였다. 특히 전광 처리구에 비해서 강피음 처리구에서 총 엽록소 함량이 유의적 차이를 보이면서 가장 높게 나타났다. 엽록소 a와 b 각각의 함량 변화도 총 엽록소 함량과 같은 경향이었다. 피음 수준이 높아지면서 엽록소 b의 함량 증가가 엽록소 a의 함량에 비해 상대적으로 더 크게 증가하였는데 이 때문에 피음 강도가 강해지면서 엽록소 a/b율이 감소하는 경향을 나타냈다. 위의 결과를 종합해 볼 때 세 수종의 적정 생육 광도는 자작나무는 전광 처리구(상대투광율; 100%), 개 벚나무는 약피음 처리구(상대투광율; 64~73%), 함박꽃 나무는 보통피음 처리구(상대투광율; 35~42%)가 적합 하다고 판단된다. 그러나 수목의 생육에 있어서 광도뿐만 아니라 온도, 습도, 토양환경, 경쟁식생 등 여러 가지 다양한 환경인자가 관여하기 때문에 광도 변화와 연계한 보다 많은 연구가 필요할 것으로 판단된다.


    This present study was conducted to investigate photosynthetic characteristics, chlorophyll fluorescence, chlorophyll contents of Betula platyphylla var. japonica, Prunus leveilleana, Magnolia sieboldii, growing under four different light intensity regimes (full sun, and 64~73%, 35~42%, 9~16% of full sun). As result, Betula platyphylla var. japonica showed outstanding photosynthetic capacity and apparent quantum yield in full sun and showed low shade tolerance. Prunus leveilleana showed good photosynthetic capacity and apparent quantum yield in 64~73% or 35~42% of full sun and showed common shade tolerance. However, Magnolia sieboldii showed good photosynthetic capacity and apparent quantum yield in 35~42% of full sun, while the lowest in full sun. Magnolia sieboldii showed the highest shade tolerance compared to the other species. As the shading level increased, the total chlorophyll contents of all species increased with significant difference.


  • 주제어

    광합성 .   광화학효율 .   내음성 .   엽록소 .   피음 처리.  

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  • 이 논문을 인용한 문헌 (5)

    1. Lee, Kyeong-Cheol ; Lee, Hak-Bong ; Park, Wan-Geun ; Han, Sang-Sup 2012. "Physiological Response and Growth Performance of Parasenecio firmus under Different Shading Treatments" 한국농림기상학회지 = Korean Journal of Agricultural and Forest Meteorology, 14(2): 79~89     
    2. Lee, Kyeong-Cheol ; Noh, Hee-Sun ; Kim, Jongh-Wan ; Han, Sang-Sup 2012. "Physiological Responses of Cirsium setidens and Pleurospermum camtschaticum under Different Shading Treatments" 생물환경조절학회지 = Journal of bio-environment control, 21(2): 153~161     
    3. Song, Ki Seon ; Jeon, Kwon Seok ; Choi, Kyu Seong ; Kim, Chang Hwan ; Park, Yong Bae ; Kim, Jong Jin 2015. "Characteristics of Photosynthesis and Leaf Growth of Peucedanum japonicum by Leaf Mold and Shading Level in Forest Farming" 韓國藥用作物學會誌 = Korean journal of medicinal crop science, 23(1): 43~48     
    4. Jeon, Kwon Seok ; Song, Ki Seon ; Choi, Kyu Seong ; Kim, Chang Hwan ; Park, Yong Bae ; Kim, Jong Jin 2015. "Growth and Photosynthetic Characteristics of Atractylodes japonica by Light Controls and Leaf Mold Treatment in Forest Farming" 韓國藥用作物學會誌 = Korean journal of medicinal crop science, 23(2): 161~167   
    5. Song, Ki Seon ; Jeon, Kwon Seok ; Choi, Kyu Seong ; Kim, Chang Hwan ; Park, Yong Bae ; Kim, Jong Jin 2016. "Characteristics of Growth and Photosynthesis of Peucedanum japonicum by Shading and Leaf Mold Treatment in Forest Farming" 韓國林學會誌 = Journal of Korean Forest Society, 105(1): 78~85     

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