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Bark Extractives of Several Populus Trees  

Ham, Yeon-Ho (Radiation Food Technology and Bioscience Team, Korea Atomic Energy Research Institute)
Kim, Jin-Kyu (College of Forest sciences, Kangwon National University)
Lee, Sang-Keuk (College of Forest sciences, Kangwon National University)
Bae, Young-Soo (College of Forest sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.30, no.1, 2002 , pp. 63-71 More about this Journal
Abstract
The bark of P. alba × glandulosa, P. euramericana and P. nigra × maximounczii F1, several Populus trees, were collected, extracted with acetone-H2O(7:3, v/v), fractionated with hexane, chloroform and ethylacetate, and freeze dried to give some dark brown powder. Each fraction of the powder was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-hexane mixture as eluents and then identified by thin layer chromatography using TBA and 6% acetic acid as developing solvents. The structures of the isolated compounds were characterized by 1H, 13C and 2D-NMR tools including mass spectrometry. Most of the compounds were flavonoids and salicin derivatives as follows: (+)-catechin, taxifolin, aromadendrin, eriodictyol, naringenin, sakuranetin, sakuranetin-5-O-𝛽-D-glucopyranoside, neosaturanin, salireposide, p-coumaric acid, and aesculin from P. alba × glandulosa, (+)-catechin, salireposide, populoside and salicortin from P. euramericana and (+)-catechin, quercetin, padmatin, salireposide, populoside and salicortin from P. nigra × maximounczii F1.
Keywords
Populus; P. alba${\times}$glandulosa; P. euramericana; P. nigra${\times}$maximounczii $F_1$; extractives; chromatography; flavonoids; salicin derivatives;
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