Comparative Chemical Analysis of the Extractives Constituents in the Bark and Heartwood of Juglans regia L. from North of Iran
Abstract
Exhaustive ethanol-toluene of the bark and heartwood of Juglans regia L. (Juglandaceae) afforded pale red colored extractives 10 and 12% yields, respectively. Detailed chemical evaluation of these extracts using GC/MS revealed the major components in the bark and heartwood extractives to be the 3,7-dioxa-2,8- disilanonane,2,2,8,8-tetramethyl (25.17%), while the major heartwood extractives constituent was benzoic acid, 3,4,5-tri(hydroxyl)/Gallic acid (44.57%). The same components of the bark and the heartwood also contained amounts of the gallic acid, 3,7-dioxa-2,8-disilanonane, 2,2,8,8- tetramethyl, and d-glucose,2,3,4,5,6- pentakis-o-(hydroxyl). The most toxic components in the heartwood were juglone (5.15%) and 2,7-dimethylphenanthrene (5.81%).
Downloads
References
[2]. Bhargava, U.C. & Westfall, B.A. (1968). Antitumor activity of Juglans nigra (black walnut) extractives. Journal of Pharmaceutical Sciences, 57 (10):1674-1677.
[3]. Gupta, S.R., Ravindranath, B. & Seshadri, T.R. (1972). Juglandaceae: Polyphenols of Juglans nigra. Photochem., 11: 2634-2636.
[4]. McGranahan, G. and Leslie, C. (1991). Walnuts (Juglans L.). In Genetic Resources of Temperate Fruit and Nut Crops. J.N. Moore and J.R. Ballington (eds). International Society for Horticultural Science, Wageningen, pp. 907 – 951.
[5]. Muller, W.U. & Leistner, E. (1978). Aglycones and glycosides of oxygenated Naphthalenes and a glycosyltransferase from Juglans. Phytochemistry, 17(10): 1739-1742.
[6]. Seshadri, T.R. (1973). An investigation of the phenolic constituents of certain woods and barks, including North American species and representatives of genera common to North America and India, (J.W Rowe, USDA PL-480 Proj. FG-In-425 Forest Prod. Lab. Madison Wis.).
[7]. Soderquist, C.J. (1973). Juglone and allelopathy. Journal of Chemical Education, 50 (11): pg. 782.
[8]. Talapatra, S.K., Karmacharya, B. & Talabatra, B. (1988). Levoregiolone an alpha-tetralone from Juglans regia; Structure, Stereochemistry and confirmation. Phytochemistry, pg. 3929.
[9]. Westfall, B.A., Russell, R.L. & Auyong, T.K. (1961). Depressant agent from walnut hulls. Science, 134: 1617.
This work is licensed under a Creative Commons Attribution 4.0 International License.
