: This study was carried out to investigate ginsenoside content in different root parts and the correlation between root diameter and ginsenoside composition of Panax ginseng C. A. Meyer cultivated by direct seeding. The unit contents of ginsenoside were 29. 65, 28.76, 26.34 ㎎/g, respectively in 4, 5, 6 years old. However, the total contents of ginsenoside were 431.97, 606.56, 657.80 ㎎/root, respectively. Total ginsenoside content of fine root was higher than that of main root and lateral root. These tendencies were related to decrease by the increase of root diameter. When diameter of main root and lateral root were the same in different ages, the total ginsenoside content was higher in the order of 4 > 5 > 6 years old roots. Except for ginsenoside-Rg1, other ginsenosides components (PD/PT and total ginsenosides) had highly negative correlation with the root diameter within whole root, main root, lateral root and fine root, which indicated that ginsenoside content is correlated to root diameter. As results, it is suggested that ginsenoside content can be predicted.

: This study was carried out to investigate change of ginsenoside contents in red and fresh ginseng according to root part and age by hydrolysis. Neutral total ginsenoside contents by hydrolysis in 6-year main root and lateral root were significantly increased than those by non-hydrolysis, as 41.6 and 32.8%, respectively. However, there was no significant difference in red ginseng. In fresh ginseng, ginsenoside contents of the protopanaxatriol group such as Re, Rf, Rg 1 , Rg 2, and Rh 1 were not significantly different, but Rb 1 , Rb 2 , Rb 3 , Rc, and Rd showed significant difference. The increase rate of neutral total ginsenoside content by hydrolysis was higher in epidermis-cortex than stele. Also, the neutral total ginsenoside content was fine root > rhizome > lateral root > main root, respectively. While there was no tendency towards the increase of ginsenoside by hydrolysis with the increase of root age in fine root and rhizome, there was significant decrease in main root and lateral root.

: This study was carried out to investigate change of ginsenoside contents according to tissue ratio in ginseng root by age and diameter. The epidermis-cortex and xylem-pith extent, fresh weight, dry weight of ginseng increased with the root age increase. They increased higher in xylem-pith than in epidermis-cortex. The ratio of epidermis-cortex decreased and xylem-pith increased as the main root diameter increased. In case of same diameter, the xylem-pith ratio increased by the increase of root age. The epidermis-cortex ratio was 4 > 5 > 6 years, respectively. The total 10 ginsenosides of epidermis-cortex increased with the root age increase. However, the total ginsenoside of xylem-pith decreased and it was 2~5 times lower than epidermis-cortex. The most of ginsenoside contents existed in epidermis-cortex. The diameter decrease in main root is related to the increase of epidermis-cortex ratio. It leads to increase of ginsenoside contents. In order to select high level of ginsenoside cultivar, it suggested that it should be selected main root having narrow diameter and lower epidermis-cortex ratio.Key Words : Panax ginseng, Diameter, Epidermis-Cortex, Xylem-Pith, Ginsenoside Content et al., 1983;Lim, 2005), 뿌리의 조직 (Lee et al., 1978;Park et al., 1982;Tani et al., 1981), 뿌리의 부위 (Kim et al., 1984(Kim et al., , 1987 재료 및 방법 Ginsenoside 분석Ginsenoside 추출은 각 시료를 3반복으로 3 g 측량하여 50% methanol 60 ㎖를 250 ㎖의 삼각플라스크에 넣고 ultra-sonicater (60 khz, heat power 330 W; JAC Ultrasonica 4020, KODO, 중심주 19.68, 22.37, 30.18 g이고, 피층의 생 체중 비율은 각각 49.9, 42.7, 44.3%로 고년 근으로 갈수록 감소하였다. 건물중은 피층이 4.92, 5.32, 6.78 g, 중심주 4.58, 5.43, 7.92