Cinnamic acid is a precursor of benzoic acids in cell cultures of Hypericum androsaemum L. but not in cell cultures of Centaurium erythraea RAFN

被引：36

作者：

El-Mawla A.M.A.A. ^{[1
]}

Schmidt W. ^{[1
]}

Beerhues L. ^{[1
]}

机构：

[1] Institut für Pharmazeutische Biologie, Universität Bonn, 53115 Bonn

来源：

Planta | 2001年 / 212卷 / 2期

关键词：

Benzoic acid biosynthesis; Centaurium (cell culture); Hypericum (cell culture); Methyl jasmonate; Xanthone biosynthesis;

D O I：

10.1007/s004250000394

中图分类号：

学科分类号：

摘要：

Benzoic acids are precursors of xanthone biosynthesis which has been studied in cell cultures of Hypericum androsaemum (Hypericaceae) and Centaurium erythraea (Gentianaceae). In both cell cultures, methyl jasmonate induces the intracellular accumulation of a new xanthone. Under these inductive conditions, feeding experiments were performed with [U-14C]L-phenylalanine, [7-14C]benzoic acid and [7-14C]3-hydroxybenzoic acid. All three precursors were efficiently incorporated into the elicited xanthone in H. androsaemum, whereas 3-hydroxybenzoic acid was the only precursor to be incorporated into xanthones in C. erythraea. In addition, an appreciable increase in phenylalanine ammonia-lyase activity occurred only in methyl-jasmonate-treated cell cultures of H. androsaemum. Benzoic acids thus appear to be formed by different pathways in the two cell cultures studied. In H. androsaemum, benzoic acid is derived from cinnamic acid by side-chain degradation. In C. erythraea 3-hydroxybenzoic acid appears to originate directly from the shikimate pathway.

引用

页码：288 / 293

页数：5

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