The biosynthesis of allelopathic di-C-glycosylflavones from the roots of Desmodium incanum (G. Mey.) DC.

The biosynthesis of allelopathic di-C-glycosylflavones from the roots of Desmodium incanum (G. Mey.) DC.
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从 Desmodium incanum (G. Mey.) DC 根部生物合成化感作用的二 C-糖基黄酮。

DOI:
10.1039/c5ob01926e
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发表时间:
2015
影响因子:
3.2
通讯作者:
Hao B
Hao B
中科院分区:
化学3区
文献类型:
--
作者:
Hao B

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研究了耐旱自给粮间作D.保护免受寄生杂草独脚金(Strigahermonthica)侵害的白色念珠菌(incanum)包含许多特异性地含有C-葡糖基、C-半乳糖基和C-阿拉伯糖基部分的二-C-糖基黄酮。在这里,我们证明了所有含有C-葡萄糖的化合物的生物合成涉及2-羟基aringenin的C-葡萄糖基化,随后的C-半乳糖基化,C-葡萄糖基化或C-阿拉伯糖基化。此外,粗可溶性酶提取物将两种氟化2-羟基黄烷酮类似物转化为相应的单-和二-C-糖基黄酮,表明植物酶可以耐受C-环取代中的一些差异。阐明这些C-糖基黄酮(CGF)的生物合成有可能为转移S. hermonthica抑制对粮食作物的化感作用。
The allelopathic root exudate of the drought-tolerant subsistence cereal intercrop D. incanum, protecting against the parasitic weed Striga hermonthica, comprises a number of di-C-glycosylflavones specifically containing C-glucosyl, C-galactosyl and C-arabinosyl moieties. Here we demonstrate that the biosynthesis of all compounds containing a C-glucose involves C-glucosylation of 2-hydroxynaringenin with subsequent C-galactosylation, C-glucosylation or C-arabinosylation. In addition, the crude soluble enzyme extract converts two fluorinated 2-hydroxyflavanone analogues to corresponding mono- and di-C-glycosylflavones demonstrating that some differences in C-ring substitution can be tolerated by the plant enzymes. Elucidating the biosynthesis of these C-glycosylflavones (CGFs) has the potential to open up opportunities for transferring the enzymic and genetic basis for the S. hermonthica inhibiting allelopathic trait to food crop plants.
DOI: 10.1023/a:1020525521180
发表时间: 2002-09-01
影响因子: 2.3
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在体内将黄烷酮掺入 C-糖基黄酮中。
DOI: --
发表时间: 1973
期刊: Biochimica et Biophysica Acta
影响因子: --
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J. W. Wallace;H. Grisebach
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