Abstract

Between Modena and Bologna Apennines (Italy), several agricultural farms have recently been dedicated to the cultivation of autochthonous aromatic plants as primary cultivation or to complement other crops. In this study, the chemical composition of Thymus vulgaris L. essential oils (EOs) from this region was evaluated by means of gas-chromatographic analysis. Three different mulching techniques, in particular, soil coverage with grass, mulch with plastic film and with straw were investigated. The results highlighted that mulching techniques influenced the composition of the analysed EOs. All the EOs exerted good antimicrobial activity against clinical and food strains of the pathogen Listeria monocytogenes, with differences related to the composition. The EO obtained from plants covered with grass showed the best results, having MIC ≤ 2.5 µL/mL, and being able to inhibit also antibiotic-resistant strains, thus confirming that soil coverage with grass influences the composition and also the biological activity of Thymus vulgaris EO.

摘要

在摩德纳和博洛尼亚亚平宁山脉（意大利）之间，最近有几个农业农场致力于种植本土芳香植物作为主要种植或补充其他作物。在这项研究中，通过气相色谱分析评估了来自该地区的百里香精油 (EOs) 的化学成分。研究了三种不同的覆盖技术，特别是草地覆盖、塑料薄膜覆盖和稻草覆盖。结果表明，覆盖技术影响了分析的 EO 的组成。所有 EO 均对单核细胞增生李斯特菌的临床和食品菌株具有良好的抗菌活性，与组成有关的差异。从覆盖草的植物中获得的 EO 显示出最好的结果，MIC ≤ 2.5 µL/mL，并且能够抑制抗生素抗性菌株，从而证实土壤覆盖草会影响百里香的组成和生物活性EO。