Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Effects of Cadmium Treatment on Carbohydrate Allocation and Partitioning of Five Half-sib Families of Betula schmidtii

박달나무 반형매 5가계의 탄수화물 배분 및 분할에 대한 Cd 처리 효과

  • Han, Sim-Hee (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Oh, Chang-Young (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Lee, Jae-Cheon (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Kim, Pan-Gi (Department of Forest Resources and Environment, Sangju National University)
  • 한심희 (국립산림과학원 산림유전자원부) ;
  • 오창영 (국립산림과학원 산림유전자원부) ;
  • 이재천 (국립산림과학원 산림유전자원부) ;
  • 김판기 (국립상주대학교 산림환경자원학과)
  • Published : 2006.03.01
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Abstract

This study was conducted to understand the regulation mechanism of carbohydrate allocation and partitioning of one-year-old seedlings of Betula schmidtii with Cd treatment, and to assess tolerance against Cd toxicity among five half-sib families on the basis of carbon allocation and partitioning. Seedlings were treated with $CdSO_4$ solution of 0, 0.2, 0.4, and 0.6 mM for two months. After harvesting, carbohydrate concentrations were analyzed for leaves, stems and roots of seedlings. Carbohydrate concentration for Cd-treated seedlings decreased in comparison with control plants, even though Cd effects were significantly different among five families. Meanwhile, Cd treatment decreased carbohydrate allocation in leaves and increased allocation in roots. In addition, partitioning of glucose in leaves was increased by Cd treatment, but partitioning of sucrose and starch in leaves decreased. In Cd-treated roots, partitioning of glucose, sucrose and starch increased. On the basis of carbohydrate allocation patterns, 'Family No. 7' (of the five families studied) was considered as the most sensitive family to Cd toxicity because the decrease of carbohydrate concentration and the change of carbohydrate allocation pattern after Cd treatment were relatively greater.

Cd 처리에 의해서 스트레스를 받고 있는 박달나무의 탄수화물 배분 및 분할 기작을 이해하고, 이를 기준으로 가계간 Cd 독성에 내성 수준을 평가하기위해서, 박달나무 5가계의 1년생 묘목에 0, 0.2, 0.4, 0.6 mM의 농도로 $CdSO_4$ 용액을 2개월간 처리한 후 잎, 줄기, 뿌리의 탄수화물 농도를 측정하였다. Cd를 처리한 박달나무는 가계 간에 다소간의 차이는 있었으나, 체내 탄수화물의 함량이 대조구에 비하여 낮은 함량을 나타내었다. 기관에 따라서는 잎의 탄수화물 배분율이 감소되고 뿌리의 배분율이 증가하는 경향을 나타냈다. 그리고 Cd처리에 의하여 잎은 포도당 함량이 증가하고 자당과 전분의 농도가 감소하며, 뿌리는 포도당, 자당, 전분이 모두 증가하는 경향을 나타냈다. 이상의 결과를 토대로 본 연구에 공시한 박달나무 5가계 중 No. 7번 가계가 Cd에 가장 민감한 가계로 평가되었다.

Keywords

References

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