Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Salt Tolerance Assessment with NaCl of Stauntonia hexaphylla (Thunb.) Decene. and Raphiolepis indica var. umbellata (Thunb.) Ohashi

NaCl 처리에 따른 멀꿀과 다정큼나무의 내염성 평가

  • Choi, Su Min (Southern Forest Resource Research Center, Korea Forest Research Institute) ;
  • Shin, Hyeon Cheol (Southern Forest Resource Research Center, Korea Forest Research Institute) ;
  • Kim, Inhea (Department of Landscape Architecture, Gyeongnam National University of Science and Technology) ;
  • Huh, Keun Young (Department of Landscape Architecture, Gyeongnam National University of Science and Technology) ;
  • Kim, Daeil (Department of Horticultural Science, Chungbuk National University)
  • 최수민 (국립산림과학원 남부산림자원연구소) ;
  • 신현철 (국립산림과학원 남부산림자원연구소) ;
  • 김인혜 (경남과학기술대학교 조경학과) ;
  • 허근영 (경남과학기술대학교 조경학과) ;
  • 김대일 (충북대학교 원예과학과)
  • Received : 2013.03.14
  • Accepted : 2013.04.12
  • Published : 2013.09.30
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Abstract

Stauntonia hexaphylla and Raphiolepis indica, cold-tolerant broadleaved evergreens ranging through the southern region of South Korea, were assessed on salt tolerance with NaCl treatment using visual damage, chlorophyll florescence image, and malondialdehyde (MDA) analysis. As NaCl concentrations increased, the soil pH decreased and EC increased, and the soil of S. hexaphylla was affected more strongly by the treatment than that of R. indica. In visual damage, S. hexaphylla withered above 200 mM NaCl at 20 days after the treatment. All individuals of R. indica survived during the experiment though the leaves of R. indica showed visual damages up to 400 mM NaCl. The color changes in chlorophyll fluorescence showed a strong correlation with the degree of visual damage. As NaCl increased, the red color of the leaves of S. hexaphylla was distinctly changed to blue and chlorophyll fluorescence decreased starting from the margin to the middle of a leaf. R. indica showed subtle color changes and remained in red color during the experiment. At five days after the NaCl treatment, the MDA of S. hexaphylla was above $4.56nmol{\cdot}g^{-1}$ when plants showed the highest visual damage and EC. The MDA of R. indica in all treatments showed below $1.5nmol{\cdot}g^{-1}$ except 400 mM NaCl treatment during the experiment.

상록활엽 조경소재 연구개발의 일환으로써, 기후변화에 대응하여 내한성이 우수한 남부지역 상록활엽수 중에서 멀꿀과 다정큼나무에 대하여 가시적 피해, 엽록소 형광이미지, MDA(malondialdehyde) 농도 분석으로 내염성을 평가하였다. NaCl 농도가 증가함에 따라서 토양 pH는 감소하고 EC는 증가하였으며 멀꿀이 생육 중은 토양은 다정큼나무가 생육 중인 토양보다 더 강하게 영향을 받았다. 시각적 피해에서 멀꿀은 처리 후 20일에 200mM NaCl 농도 이상에서 고사하였다. 다정큼나무는 비록 400mM NaCl 농도에서 잎의 피해를 나타냈지만 실험기간 동안 모두 생존하였다. 엽록소 형광이미지에서 색상변화는 시각적 피해 결과와 강한 일관성을 보였다. NaCl 농도가 증가함에 따라서 멀꿀 잎의 적색은 유의성 있게 낮은 형광 값인 청색으로 변화하였고 변화는 가장자리에서 중앙으로 옮겨갔다. 다정큼나무의 형광이미지 반응은 NaCl 처리일이 증가할수록 잎의 가장자리에 변화가 나타났으나 여전히 실험기간 동안 적색을 나타냈다. 가장 높은 시각적 피해와 EC를 보였던 처리 후 5일에 멀꿀의 MDA 농도는 $4.56nmol{\cdot}g^{-1}$였다. 다정큼나무의 MDA 농도는 400mM NaCl 농도 처리구를 제외한 모든 처리구들에서 $1.5nmol{\cdot}g^{-1}$ 이하를 나타냈다.

Keywords

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