This study was carried out to investigate the environment factors including community structure and soil characteristics in the wild habitats of Cephalotaxus koreana, and offers the basic information for habitats conservation and restoration. Most of the wild habitats were located at altitudes between 148~835 m with inclinations ranged as 12~32°. The average soil pH was 4.7~5.9, soil organic matter was 5.72~15.99%, cation exchange capacity was 14.1~19.9 cmolc/㎏-1 and exchangeable K+, Ca2+, Mg2+ was 0.25~0.48 cmolc/㎏, 0.79~6.68 cmolc/㎏, 0.31~1.73 cmolc/㎏, respectively. The dominant species of tree layer were found to be dominated by Quercus dentata in Jekbo-san (C1), Acer pictum in Bogae-san (C2), Acer pseudosieboldianum in Geumwon-san (C3), Q. serrata in Jiri-san (C4), Zelkova serrata in Baegun-san (C5), and Q. acutissima in Duryun-san (C6). The Species diversity (H’) was 0.854~1.234, evenness (J’) was 0.654~0.993, and dominance (D) was found to be 0.067~0.346. Correlation coefficients analysis based on environmental factors, community structure and value of species diversity shows that growth of Cephalotaxus koreana is correlated with species diversity and evenness. This result show that Cephalotaxus koreana habitats located in mature stands.

천연집단에 서식하는 개비자나무 개체들을 이용해 무생물 및 생물적 환경인자가homoharringtonine(HHT) 함량에 미치는 영향을 조사하여 향후 항암제 가능성이 있는 HHT의 고부가가치 산업적인 생산이 기대되는 연구에 기초자료를 제공하고자 본 연구를 수행하였다. 무생물적 환경인자(토양습도, 토양pH, 서식밀도, 기온)와 HHT 함량과의 상관관계에 있어 HHT 는 토양습도(0.77)와 토양pH(-0.68)에서 높은 상관을 보였다. 고도에 따른 무생물적 환경인자 (토양습도, 토양pH)와 HHT 의 함량 관계에 관해 다중회귀 분석을 실시한 결과, 토양 습도의 회귀계수(26.48***) 만 유의하여 토양 습도가 상대적으로 HHT 함량에 높은 영향을 미치는 것으로 나타났다. 생물적 환경인자(damage index)에 따른 HHT 함량에 미치는 영향을 살펴 본 결과, HHT는 2차곡선회귀적으로 증가하다 감소하는(H=278.23+1242D-398.87D2) 경향을 보였고 damage index는 HHT 함량에 높은 영향을 미치는 것으로 분석되었다. 마지막으로 HHT 의 함량에 영향을 미치는 최적환경인자를 분석한 결과, damage index와 토양 습도 모두가 2차다항회귀식으로 가장 적합하였고 결정계수는 각각 0.73와 0.67로 damage index가 상대적으로 HHT 함량에 높은 영향을 미치는 것으로 나타났다. 이는 섭식자 또는 균류와 같은 스트레스로 인한 방어기작이 HHT 의 생성에 높은 영향을 미치는 것으로 판단된다.

Cephalotaxus koreana Nakai is endemic species of Korea. Since old days, the fruits have been used as a parasiticide and leaves have been used for a pierced wound by insects. The essential oil components from its aerial parts and stem bark by steam distillation were investigated. Several compounds were characterized by GC-Mass spectra. It was found that the leaves, stembark and flowers contain the compounds of essential oils, 1-octene-3-ol, hexadecanoic acid; α-pinene, δ3-carene mainly, linalylacetate, β-cubebene, 3,4-octadine-7-methyl , ferruginol(stem bark) and α-pinene mainly, β-pinene , cyclopropane-1,1-dimethyl-2-(3-methyl-1,3-butadienyl), etc. This Cephalotaxus spp. contains the first components of ferruginol(M.W.286.03, C20H30O) which belong to diterpene.