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Alkylresorcinols in Barley (Hordeum vulgare L. distichon) Grains Robert Z˙ arnowski

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Alkylresorcinols in Barley (Hordeum vulgare L. distichon) Grains

Robert Z ˙ arnowski

a,

*, Yoshikatsu Suzuki

b

, Isamu Yamaguchi

b

and Stanisław J. Pietr

a

a Department of Agricultural Microbiology, Agricultural University, Grunwaldzka 53, 50Ð375 Wrocław, Poland. Fax: +48-(0)71-3282868. E-mail: robert@ozi.ar.wroc.pl

b RIKEN (The Institute of Physical and Chemical Research), Hirosawa 2Ð1, Wako-shi, Saitama 351Ð0198, Japan

* Author for correspondence and reprint requests

Z. Naturforsch.57 c,57Ð62 (2002); received August 8/September 7, 2001 Barley, Alkylresorcinols, Resorcinolic Lipids

This study was carried out to compare grains of barley (Hordeum vulgare L. distichon) regarding contents and compositions of 5-n-alkylresorcinols. Mixtures of resorcinol homo- logues were isolated from acetone extracts from five barley cultivars. These polyketide me- tabolites were identified by chromatographic and spectroscopic means. The content and ho- mologue patterns among different varieties were similar. The predominant compounds were 1,3-dihydroxy-5-n-heneicosylbenzene (C21:0), 1,3-dihydroxy-5-n-nonadecylbenzene (C19:0) and 1,3-dihydroxy-5-n-pentacosylbenzene (C25:0). The alkylresorcinol concentrations, in con- trast to their compositions, depended on environmental and agricultural factors.

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