Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
권호 표지

Effect of Shading Treatments on Photosynthetic Activity of Adenophora triphylla var. japonicum

차광처리가 잔대의 광합성 활성에 미치는 영향

  • Kim, Jeong-Woon (Southern For. Res. Center, Korea For. Res. Insti.) ;
  • Yoon, Jun-Hyuck (Southern For. Res. Center, Korea For. Res. Insti.) ;
  • Jeon, Kwon-Seok (Southern For. Res. Center, Korea For. Res. Insti.) ;
  • Chung, Jae-Min (Dept. of Plant Conserv., Korea National Arboretum) ;
  • Jung, Hye-Ran (Dept. of Plant Conserv., Korea National Arboretum) ;
  • Cho, Min-Gi (Dept. of For. Environ. Res., Gyeongsang National Univ.(Insti. of Agric. & Life Sci.)) ;
  • Moon, Hyun-Shik (Dept. of For. Environ. Res., Gyeongsang National Univ.(Insti. of Agric. & Life Sci.))
  • 김정운 (국립산림과학원 남부산림연구소) ;
  • 윤준혁 (국립산림과학원 남부산림연구소) ;
  • 전권석 (국립산림과학원 남부산림연구소) ;
  • 정재민 (국립수목원 산림자원보존과) ;
  • 정혜란 (국립수목원 산림자원보존과) ;
  • 조민기 (경상대학교 산림환경자원학(농업생명과학연구원)) ;
  • 문현식 (경상대학교 산림환경자원학(농업생명과학연구원))
  • Received : 2012.07.02
  • Accepted : 2012.08.28
  • Published : 2012.08.30
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Abstract

This study was conducted to investigate photosynthetic characteristics of two-year-old of Adenophora triphylla var. japonicum grown under control (full sunlight) and three different shading treatment (25, 50, and 75% shading treatment). Total chlorophyll contents like chlorophyll a and b content had not significant difference among treatments. Net photosynthetic rate of control and 25% treatment were higher than 50% and 75% treatment. Seedlings grown under full sunlight showed the highest photosynthetic activity such as photosynthetic rate, stomatal conductance and intercellular $CO_2$ concentration except for water use efficiency which was relative higher under 50% and 75% treatment.

본 연구는 네 가지 서로 다른 비음처리구(무처리, 25%, 50%, 70% 차광처리)에서 2년간 생육한 잔대 묘목의 광합성 특성을 분석하였다. 엽록소 a, b 함량과 마찬가지로 총 엽록소 함량은 처리구간에서 유의적인 차이가 나타나지 않았다. 광합성능력은 50%와 75% 차광처리구 보다 무처리구와 25% 처리구가 더 높은 것으로 나타났다. 무처리구(전광조건) 하에서 생육한 잔대 묘목은 가장 높은 광합성 능력, 기공전도도, 엽육 내 $CO_2$ 농도를 나타냈으며, 수분이용효율은 50%와 75% 차광처리구가 무처리구(전광조건) 보다 더 높은 것으로 나타났다.

Keywords

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