Wu H, Haig T, Pratley J, Lemerle D, An M
Farrer Centre for Conservation Farming, Charles Sturt University, PO Box 588, Wagga Wagga, NSW 2678, Australia.
J Chem Ecol. 2001 Jan;27(1):125-35. doi: 10.1023/a:1005676218582.
Seven known phenolic acids implicated in wheat allelopathy were analyzed in a worldwide collection of 58 wheat accessions by gas chromatography and tandem mass spectrometry (GC-MS-MS). Chemical analysis showed that accessions differed significantly in the production of p-hydroxybenzoic, vanillic, syringic, trans-p-coumaric, cis-p-coumaric, trans-ferulic, and cis-ferulic acids in the shoots of 17-day-old wheat seedlings. The concentrations of p-hydroxybenzoic, vanillic, cis-p-coumaric, and cis-ferulic acids were normally distributed in the 58 accessions. A binormal distribution was found for syringic and trans-ferulic acids and a skewed normal distribution for trans-p-coumaric acid. The concentration of each compound also varied with phenolic acids. The relative abundance of each phenolic acid was ordered decreasingly as trans-ferulic, vanillic, trans-p-coumaric, p-hydroxybenzoic, syringic, cis-ferulic, and cis-p-coumaric acids. The concentration of total identified phenolic acids varied from 93.2 to 453.8 mg/kg in the shoots of 58 accessions. The content of each phenolic acid or group was highly associated with others in the shoots of wheat seedlings. Wheat accessions with high levels of total identified phenolic acids in the shoots are generally strongly allelopathic to the growth of annual ryegrass.
通过气相色谱-串联质谱法（GC-MS-MS），对来自世界各地的58份小麦种质中的7种已知参与小麦化感作用的酚酸进行了分析。化学分析表明，在17日龄小麦幼苗的地上部分，不同种质在对羟基苯甲酸、香草酸、丁香酸、反式对香豆酸、顺式对香豆酸、反式阿魏酸和顺式阿魏酸的产生上存在显著差异。对羟基苯甲酸、香草酸、顺式对香豆酸和顺式阿魏酸的浓度在58份种质中呈正态分布。丁香酸和反式阿魏酸呈现双正态分布，反式对香豆酸呈现偏态正态分布。每种化合物的浓度也因酚酸而异。每种酚酸的相对丰度从高到低依次为反式阿魏酸、香草酸、反式对香豆酸、对羟基苯甲酸、丁香酸、顺式阿魏酸和顺式对香豆酸。在58份种质的地上部分，已鉴定出的酚酸总量浓度在93.2至453.8毫克/千克之间。在小麦幼苗的地上部分，每种酚酸或酚酸组的含量与其他酚酸或酚酸组高度相关。地上部分已鉴定出的酚酸总量水平高的小麦种质通常对一年生黑麦草的生长具有较强的化感作用。
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