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Biotic and Abiotic Factors Affecting Homoharringtonine Contents of Cephalotaxus koreana Nakai  

Jung, Myung-Suk (Department of Forest Science, Seoul National University)
Hyun, Jung-Oh (Department of Forest Science, Seoul National University)
Lee, Uk (Department of Forest Resources Development, Korea Forest Research Institute)
Baik, Eul-Sun (Department of Forest Resources Development, Korea Forest Research Institute)
Publication Information
Korean Journal of Plant Resources / v.23, no.2, 2010 , pp. 172-178 More about this Journal
Abstract
This study was carried out to investigate abiotic and biotic environmental factors affecting homoharringtonine (HHT) contents of Cephalotaxus koreana, whereby, to provide basic information of high value-added industry production of HHT as a promising anti-cancer agent. For correlation between abiotic environmental factors (soil moisture, soil pH, habitat density and temperature) and HHT contents, the contents were highly correlated with soil moisture (0.77) and soil pH (-0.68). For multiple regression analysis of relationship between abiotic environmental factors (soil moisture and soil pH) and HHT contents, soil moisture appeared to be strongly affecting the contents relatively due to being significant at only its regression coefficient ($26.48^{***}$). For the effect of biotic environmental factors (damage index) affecting HHT contents, the contents was quadratic with equation of $H=278.23+1242D-398.87D^2$, also, damage index had strong effect on the contents. Finally, for the result of the most influencing an environmental factor on HHT contents, both damage index and soil moisture were suitable in second polynomial regression, also, damage index ($R^2=0.73^{***}$) was turned out to be more influencing factor than soil moisture ($R^2=0.67^{**}$) on HHT contents relatively. Therefore, we predict that HHT contents in the trees of Cephalotaxus koreana is produced as a chemical defense mechanism triggered by a stress-related damage of fungi or insects.
Keywords
Homoharringtonine; Cephalotaxus koreana; environmental factor; damage index; regression; chemical defense;
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