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首页> 外文期刊>Australian Journal of Crop Science >Pattern of allelochemical distribution in leaves and roots of tough lovegrass (Eragrostis plana Nees.)
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Pattern of allelochemical distribution in leaves and roots of tough lovegrass (Eragrostis plana Nees.)

机译：坚韧lovegrass（Eragrostis plana Nees。）的叶子和根中的化感化学分布模式。

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This is the first report on chemical compounds in tough lovegrass, an allelopathic plant considered to be the most abundant invasive plant in the rangelands of Southern Brazil. This study aimed to evaluate the distribution and concentration of allelochemicals in the leaves and roots of tough lovegrass. Plant material was collected from an area of secondary vegetation in April 2013. Aqueous extracts (leaves and roots) were prepared and subjected to turboextraction and subsequent lyophilization. The extracts were subjected to qualitative chemical tests in order to evaluate their alkaloids, anthraquinones, flavonoids, tannins, and saponins content. Post- validation high-performance liquid chromatography (HPLC) assay was used to evaluate the allelochemicals caffeic, ferulic, p- coumaric, vanillic acids, coumarin, catechin, epicatechin, rutin, quercetin, gallic acid, and kaempferol. Qualitative chemical tests detected the presence of saponins, alkaloids, and flavonoids in the leaves and roots of tough lovegrass and tannins in only leaves. HPLC assay verified the presence of coumarin in the roots and leaves in equal amounts; ferulic acid in higher quantities in roots; caffeic, p-coumaric, and vanillic acids in higher quantities in leaves; and catechin and epicatechin in leaves only. The compounds rutin, quercetin, gallic acid, and kaempferol were not detected in the extracts. The presence of secondary metabolites varied in different plant organs. Our results demonstrated greater amount of compounds in the leaves; therefore, this organ should be prioritized in the future with isolation of compounds. The presence of allelochemicals indicates that the compounds of this species can be potentially used as bioherbicides.
机译：这是有关坚韧lovegrass中化学化合物的第一份报告，该植物是化感植物，被认为是巴西南部牧场中入侵最丰富的植物。这项研究旨在评估化感化学物质在坚韧lovegrass的叶子和根中的分布和浓度。 2013年4月，从次生植被地区收集了植物材料。制备了水提取物（叶和根），并进行了涡轮萃取和随后的冻干。对提取物进行定性化学测试，以评估其生物碱，蒽醌，类黄酮，单宁和皂苷的含量。验证后的高效液相色谱（HPLC）分析用于评估咖啡，阿魏酸，对香豆酸，香草酸，香豆素，儿茶素，表儿茶素，芦丁，槲皮素，没食子酸和山emp酚等化感物质。定性化学测试检测到叶子中存在皂苷，生物碱和类黄酮，仅叶子中存在坚韧的lovegrass和单宁酸根。 HPLC分析证实等量存在于根和叶中香豆素。根中阿魏酸含量更高;叶片中咖啡酸，对香豆酸和香草酸的含量更高;和儿茶素和表儿茶素仅在叶子中。在提取物中未检测到化合物芦丁，槲皮素，没食子酸和山奈酚。次生代谢产物的存在因植物器官而异。我们的结果表明叶片中含有更多的化合物。因此，今后应优先隔离这些器官。化感物质的存在表明该物种的化合物可以潜在地用作生物除草剂。

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