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首页> 外文期刊>Journal of Chemical Ecology >Phytotoxicity of Vulpia Residues: III. Biological Activity of Identified Allelochemicals from Vulpia myuros
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Phytotoxicity of Vulpia Residues: III. Biological Activity of Identified Allelochemicals from Vulpia myuros

机译：狐臭残留物的植物毒性：III。鉴定出的黑狐V的化感物质的生物活性

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摘要

Twenty compounds identified in vulpia (Vulpia myuros) residues as allelochemicals were individually and collectively tested for biological activity. Each exhibited characteristic allelochemical behavior toward the test plant, i.e., inhibition at high concentrations and stimulation or no effect at low concentrations, but individual activities varied. Allelopathins present in large quantities, such as syringic, vanillic, and succinic acids, possessed low activity, while those present in small quantities, such as catechol and hydrocinnamic acid, possessed strong inhibitory activity. The concept of a phytotoxic strength index was developed for quantifying the biological properties of each individual allelopathin in a concise, comprehensive, and meaningful format. The individual contribution of each allelopathin, assessed by comparing the phytotoxic strength index to the overall toxicity of vulpia residues, was variable according to structure and was influenced by its relative proportion in the residue. The majority of compounds possessed low or medium biological activity and contributed most of the vulpia phytotoxicity, while compounds with high biological activity were in the minority and only present at low concentration. Artificial mixtures of these pure allelochemicals also produced phytotoxicity. There were additive/synergistic effects evident in the properties of these mixtures. One such mixture, formulated from allelochemicals found in the same proportions as occur in vulpia extract, produced stronger activity than another formulated from the same set of compounds but in equal proportions. These results suggest that the exploration of the relative composition of a cluster of allelopathins may be more important than simply focusing on the identification of one or two compounds with strong biological activity and that synergism is fundamental to the understanding of allelopathy.
机译：分别和共同测试了在狐ul（Vulpia myuros）残留物中鉴定出的二十种化合物作为化感物质的生物活性。每种都表现出对受试植物的特征化感化学行为，即在高浓度下具有抑制作用，而在低浓度下则无刺激作用，但各个活动却有所不同。大量存在的化感病原，例如丁香酸，香草酸和琥珀酸，活性低，而少量存在的化感病原，例如邻苯二酚和肉桂酸，则具有很强的抑制活性。提出了植物毒性强度指数的概念，用于以简洁，全面和有意义的格式量化每个化感病原的生物学特性。通过比较植物毒性强度指数与狐v残留物的整体毒性来评估的每种化感病原的个体贡献根据结构而变化，并受其在残留物中的相对比例的影响。大多数化合物具有较低或中等的生物活性，并贡献了大部分狐v的植物毒性，而具有高生物活性的化合物占少数，并且仅以低浓度存在。这些纯化感物质的人工混合物也产生了植物毒性。这些混合物的性质具有明显的累加/协同作用。由这样的混合物制成的混合物，其由与化石提取物中发现的比例相同的化感化学物质配制而成，比由相同组的化合物等比例混合而成的混合物具有更强的活性。这些结果表明，探索化感病原蛋白簇的相对组成可能比仅着重于鉴定具有强大生物活性的一种或两种化合物更为重要，并且协同作用是理解化感病的基础。

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