AGRONOMIC FACTORS AFFECTING ROOT YIELD AND ESSENTIAL OIL CONTENTS OF VALERIANA FAURIEI VAR. DASYCARPA HARA AND V. OFFICINALIS L. IN KOREA
Korean valerian plants (Valeriana fauriei var. dasycarpa HARA and V. officinalis L.), which were grown in southern Korea, were tested for reliable growing places, optimum temperature and light intensity and for effects of these factors on root yield, essential oil content and its composition. Photosynthesis of V. fauriei had highly significant relations to light intensity and temperature in a quadratic regression model, from which the optimum light intensity and temperature for the plant growth were estimated to be 40,000 lux and 17.7°C. Roots were produced less by shading at Daekwanryung which is located in alpine region, but root yield is increased by shading at Umsong which is located in plane area. The plants produced more roots in Daekwanryung than in Umsong under the normal light condition. The essential oil contents in dry roots of V. fauriei, V. officinalis and V. wallichii were 2.1%, 0.79% and 0.83%, respectively, indicating that the oil contents differed among the plant species examined. In V. fauriei 47 compounds were identified by GC and GC-MS analysis, while 21 and 25 compounds were identified in V. officinalis and V. wallichii, respectively. The major compounds were bornyl acetate (33.8%) and camphene (10.8%) in V. fauriei, borneol (62.5%) and -sesquiphellandrene (6.8%) in V. officinalis, and borneol, (74.3%) and -elemene (2.7%) in V. wallichii. There was no significant difference in oil content of root grown at different regions in Korea. However, its composition varied with growing conditions.
Lee, J., Kirn, Y., Choi, Y. and Ahn, D. (1996). AGRONOMIC FACTORS AFFECTING ROOT YIELD AND ESSENTIAL OIL CONTENTS OF VALERIANA FAURIEI VAR. DASYCARPA HARA AND V. OFFICINALIS L. IN KOREA. Acta Hortic. 426, 525-536