본 연구는 국내 산림생명자원 중 광나무의 대량생산을 위한 기초연구로, Priming 처리에 따른 발아 효율성 및 유묘 생육특성에 미치는 영향을 구명하고자 수행하였다. 종자 Priming처리는 대조구, GA3 (10, 100, 200 ㎎·L-1), Ca (NO3)2 (50, 100, 200 mM), KNO3 (50, 100, 200 mM)를 24시간 처리하여 발아특성을 분석하였고, 순화재배에 따른 생육특성 및 활착률을 조사하여 수확량을 비교·분석하였다. 발아특성은 25℃·KNO3 100 mM에서 발아율이 유의적으로(p<0.001) 높았으며, 평균발아일수는 10.3~18.1일로 15℃에서 대체적으로 빠른 발아일수를 나타냈다(p<0.001). 발아속도 및 발아균일지수 또한 25℃·KNO3 100 mM에서 유의적으로 높은 값을 보였다(p<0.001). 생육특성의 경우 2 5℃·KNO3 100 mM 처리에서 유근 길이(5.1±2.4 ㎝), 초장(5.7±0.7 ㎝), 근장(16.6±2.0 ㎝), 건중량(0.079 g)이 유의적으로 가장 높게 나타났다 (p<0.001). 유묘활력지수 또한 25℃·KNO3 100 mM 처리에서 1418.3으로 높았으며, 가장 높은 수확량(16.8 g/㎡)을 나타냈다. 결과적으로 25℃, KNO3 100 mM 처리 시 실내발아에서 발아효율성을 높일 수 있었으며, 순화재배 시 우수한 유묘 생육을 보여 수확량을 증진시킬 수 있었다.

Contaminated soils and water by heavy metals have posed a serious threat to environment and human health, which can be solved by both physicochemical and biological methods. Phytoremediation has recently become a topic of scientific research and gained much attention as a cost-effective and eco-friendly alternative. Many kinds of hyperaccumulator plants have been applied to deal with heavy metal contaminants such as As, Cd, Pb, Zn and various radionuclides. In recent study, a seedling vigor index (SVI) model, which uses specific hyperaccumulator plants (i.e., sunflower) as test subjects, is proposed to predict the phytotoxicity of heavy metals. However, whether this mathematical model can be commonly used has not been cleared yet. In this study, rapeseeds were treated with Cd, Pb, Ni, Zn to validate the SVI model which was proposed by some scholars previously. The phytotoxicity of heavy metal was evaluated using seed germination test and seedling length measurement. The test shows that germination percentage and seedling length decreased when heavy metal concentration increased. According to the results of regression analysis, heavy metal concentration is linear to germination percentage, root and shoot length, corresponding with SVI model. It can be concluded that the SVI estimation model obtained from sunflowers can also be applied to rapeseeds to describe the relative effects of heavy metal concentration on plants growth and development.. However, further experiments using more hyperaccumulator plants to validate the applicability of the SVI model are necessary.