본 연구는 비방사성 SrCl2를 이용하여 Sr 농도를 50, 100, 200mg·kg-1 및 토양 유기물 함량을 5%, 10% 및 15%로 달리하여 배추의 생육, 생체중, 엽록소 함량에 미치는 영향을 생육 시기별로 분석하였다. 그 결과, Sr 농도가 증가할수록 초장, 근장, 엽면적, 생체중 및 건물중이 유의하게 감소하였으며, 특히 Sr 200mg·kg-1 처리에서 생육 저 해가 뚜렷하였다. 반면, 엽록소 함량(SPAD)은 처리 간 유의한 차이를 보이지 않아 광합성 색소에는 Sr의 영향이 제 한적인 것으로 나타났다. 유기물 함량이 높은 토양에서는 Sr 처리에 따른 생육 저해가 완화되었으며, 특히 유기물 15% 조건에서 완충 효과가 가장 크게 나타났다. 이는 유기물이 Sr의 생물유효도를 감소시켜 식물체 흡수를 억제하 는 기작에 의한 것으로 판단된다. 본 연구는 비방사성 SrCl2를 이용한 실험을 통해 작물의 Sr 독성 반응과 유기물 기 반 토양 완충 효과를 정량적으로 규명하였으며, 향후 방사성 오염 토양의 생물학적 복원 및 안전 농산물 생산 전략 수립에 기초자료로 활용될 수 있다.

Oil and fatty acid composition of 648 soybean germplasms of different categories including Korean and American source were analyzed by NIRS (Near Infrared Reflectance Spectrophotometer) method at Yeongnam Agricultural Research Institute, Milyang, Korea. A

Introgression from genetically modified plants (GMPs) may be dependent on the genetic similarity to wild relative plants. In Korea, many wild plant species are botanically related to the cultivated plants that have a potential to be genetically transformed. The controversy for hazards of GMPs is continuing because the studies on gene flow or introgression are little. Based on the systematic criteria, we have surveyed Korean wild plant species that showed the similarity to cultivating crops. The consideration for feasibility of genetic pollution (introgression of transgene) is necessary for the successful accomplishment in the practical use of GMPs. Although the detrimental effects of GMPs on wild relatives have not been clearly verified, Korean wild plant species related to crop plant (potential GMP) have to be investigated with respect to the introgression. Korean flora consists of ca. 5,500 species. Among them, 1,448 species are classified as weed species (966 native, 325 naturalized, and 167 escaped ones), which is vulnerable to GMPs in term of introgression. We suggested the principal Korean wild plants related to major crops that might be affected by GMPs via introgression. The investigated species herein are selected based on the morphological and phenological relationship. It is necessary to verify the genetic relationship between cultivated plants and wild relatives sing more precise molecular techniques, which provide the information of likelihood for the introgression of transgene