Effect of Temperature Variables on Growth and Inorganic Nutrient Contents of Codonopsis lanceolata
2016
Kwon, S.J., Woosong College, Daejeon, Republic of Korea | Seo, D.Y., Kunjang University, Gunsan, Republic of Korea | Cho, G.Y., Woosong University, Daejeon, Republic of Korea | Lee, M.S., Chungbuk National University, Cheongju, Republic of Korea | Boo, H.O., WELLPHYTO Co. Ltd., BI Center, GIST, Gwangju, Republic of Korea | Woo, S.H., Chungbuk National University, Cheongju, Republic of Korea | Kim, H.H., Woosong College, Daejeon, Republic of Korea
This study was conducted to investigate the effects of temperature and shade, which are basic environmental conditions, on growth, yield, inorganic components, and general components of Codonopsis lanceolata, in order to obtain basic data for improving yield capacity. In natural light, in the 15, 20, and 25Celsius groups, the plant heights ranged between 218.9 cm and 223.9 cm, and there was no significant difference between groups. However, the leaf size was larger in shade, and the leaf area was significantly larger in the 15 and 30Celsius groups. In natural light, root length and diameter were shorter and thinner when the temperature was higher, and growth was highly suppressed at 30Celsius With regards to macroelements, the contents of Na, Mg, and P increased as temperature increased, regardless of the plant part; however, no constant tendency was observed in K and Ca according to temperature. The contents of Mg and Ca (from highest to lowest) were in the order leaf greater than stem greater than root, whereas the contents of Na, P, and K were in the order stem greater than leaf greater than root. Contents of general components varied according to temperature, and were highest at 30Celsius. While the plant height was increased under the constant 25Celsius +DIF (Difference between day and night temperature) condition, growth was suppressed in the minus DIF group, in which the night temperature was higher than the day temperature, which suggests that a change in night temperature is one of the factors that affects the growth of C. lanceolata. As in the growth of the above-ground parts, fresh weight of the root was high in the constant 25Celsius group and +DIF group. Notably, it was more than 2.5 times the fresh weights in the constant 15Celsius group, constant 20Celsius group, and minus15 DIF group.
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