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Effects of Elevated CO2 and Temperate on the Growth of Endangered Species, Cicuta virosa L. in Korea

CO2농도와 온도 상승이 한국멸종위기식물 독미나리의 생장에 주는 영향

  • Received : 2013.09.10
  • Accepted : 2013.11.02
  • Published : 2014.02.28

Abstract

The effect of elevated $CO_2$ and temperature on ecological characteristics of Cicuta virosa L., the endangered plant were examined under ambient $CO_2$+ambient temperature(AC-AT), ambient $CO_2$+elevated temperature(AC-ET) and elevated $CO_2$+elevated temperature for two years. Shoot length and the number of umbels were not different in three environmental gradients. The number of tillers was high in the order of EC-ET, AC-ET and AC-AT. The number of compound umbel was the lowest in the EC-ET. Fruit set rate was the highest in the AC-AT. These results mean that unsexual propagation of C. virosa may increase by promoting growth of tillers, rather than seed production under future global warming. This population growth study will be used as the important data for the research of Korean endangered species.

증가된 이산화탄소 농도와 온도상승에 따른 멸종위기 수생식물 독미나리의 생태학적 반응을 알아보기 위해 대조구, 온도상승구, 그리고 $CO_2$+온도상승구에서 생육시킨 결과를 비교하였다. 독미나리의 지상부 길이는 대조구, 온도상승구 그리고 $CO_2$+온도상승구간에 차이가 없었지만, 분얼 수는 대조구, 온도상승구, $CO_2$+온도상승구 순으로 증가했다. 복산형화서의 수는 대조구와 온도상승구에서 같았고, $CO_2$+온도상승구에서 감소했다. 소산형화서의 수는 대조구와 온도상승구, $CO_2$+온도상승구간에 차이가 없었다. 종자형성률은 온도상승구와 $CO_2$+온도상승구가 대조구보다 감소했고, 온도상승구와 $CO_2$+온도상승구간에 차이가 없었다. 이상으로 보면, $CO_2$농도와 온도상승은 길이생장에 영향을 주지 않은 반면, 분얼 수는 증가시키고 종자생산은 감소시킨다. 그러므로 독미나리는 지구 온난화 조건이 되면 종자생산보다 분얼을 늘려 무성번식 경향이 증가될 것이며, 이러한 개체군 생장을 연구하는 것은 멸종위기종 연구에 중요한 자료로 활용될 것이다.

Keywords

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