Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Oxidative Stress and Antioxidant Responses in Poplar Clones Irrigated with Livestock Waste Leachate

양돈폐수 처리에 의한 포플러클론의 산화스트레스와 항산화반응

  • Received : 2011.08.12
  • Accepted : 2011.09.25
  • Published : 2011.09.30
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Abstract

We studied the influence of livestock waste leachate on oxidative damage and antioxidative responses in poplar clones in August which increase the demand of antioxidants because of high temperature and high light during this period. We measured ion leakage, antioxidant enzyme activities (APX, GR), and carotenoid contents. Oxidative damage and antioxidative responses by treated livestock waste leachate in poplar clones showed various results. We divided poplar clones into three groups using the criteria based on ion leakage which represent cell damage induced oxidative stress. Eco 28, 62-10, Bonghwa1 and Dorskamp belonged to the first group in which the cell damaged level was lower than that of the control. The results suggest that this group augmented for demand of antioxidative in summer because high concentration of nitrogen induced by treatment of live stock wastes acted as environmental stress. Consequently, they failed to keep up the homeostasis of reactive oxygen species. The second group in which the cell damaged level was similar to that of the control was Suwon, 72-30 and 72-31 clones. Finally, 97-18 clone belonged to the third group in which the cell damaged level was lower than that of the control group. In this case, nitrogen treated by livestock waste leakage decreased oxidative stress. 97-18 clone was the clones with the least damage in summer oxidative stresses treated by livestock waste leakage. These results suggest that the high concentration nitrogen due to the livestock waste leakage can act differently upon the clones. We speculate that the added oxidation damage in the summer (growing season) may have an effect on the total fresh weight and also influence the purification ability for livestock waste leakage. However, further studies are needed for the confirmation.

고온과 고광으로 인해 항산화요구도가 높은 8월 시기에 포플러클론들의 산화피해와 항산화반응에 대하여 양돈폐수의 영향에 대하여 알아보았다. 잎의 이온유출량과 항산화효소 APX와 GR의 활성, 그리고 카로테노이드 함량을 조사였다. 포플러클론의 양돈폐수 처리에 따른 산화피해와 항산화반응은 다양하게 나타났다. 산화스트레스로 인한 세포막 피해 수준을 알 수 있는 이온유출량 기준으로, 크게 세 그룹으로 분류하였다. 첫번째 그룹은 세포막 피해수준이 대조구보다 높게 나타난 클론들로서 Eco 28, 62-10, Bonghwa1, Dorskamp가 포함되었다. 이들 그룹은 양돈폐수 처리로 인한 고농도 질소함량이 스트레스로 작용하여 여름철 항산화요구도가 더욱 가중된 것으로 보인다. 그래서 결과적으로 활성산소에 대한 항상성을 유지하지 못하였다. 두번째 그룹은 세포막 피해수준이 대조구와 유사한 Suwon, 72-30, 72-31 이었다. 세 번째 그룹은 세포막 피해수준이 대조구보다 낮게 나타난 97-18 이었다. 97-18 클론의 경우 양돈폐수 처리로 인해 공급된 질소가 여름철 산화스트레스에 대한 피해를 경감시켜, 양돈폐수 처리로 인한 여름철 산화피해가 가장 적은 클론으로 나타났다. 이러한 결과들은 양돈폐수로 인한 고농도 질소가 클론마다 서로 다르게 작용할 수 있음을 의미한다. 생장시기인 여름철에 가중되는 산화피해는 전체 생중량에 영향을 주어 양돈폐수 정화능력에도 영향을 미칠 수 있을 것으로 생각된다. 그러나 이러한 부분에 대해 추후 연구가 더 필요하다.

Keywords

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