Abstract

Mentha arvensis L. is one of the highly valued aromatic plants due to its essential oil which finds wide application in food, flavour and pharmaceutical industries. A polyhouse study was conducted to determine the effect of copper on the essential oil composition of M. arvensis L. The amendments of copper were 270, 500, 700 and 900 mg kg⁻¹ in triplicate along with an unamended control. After 90 days, the aerial parts of the plant were harvested, hydrodistilled and analysed by GC and GC-MS. Analysis revealed the presence of thirty-nine compounds of which twenty-two compounds were identified in control representing 96.86 % of the total oils. The main identified components in the oil of plants grown in unamended soil was menthol (84.64 %) along with menthone (4.19 %), iso-menthone (2.23 %), menthyl acetate (1.02 %) and germacrene D (1.10 %) as minor constituents. For the amendments at the level Cu₂₇₀, Cu₅₀₀, Cu₇₀₀, Cu₉₀₀ mg kg⁻¹ twenty, seventeen, seventeen and seventeen compounds were identified representing 97.80 %, 97.56 %, 96.01 % and 96.96 % of the total extracted oil. The major component in all the oil samples was menthol. The quantitative variation for menthol was found to be highest for the higher level of copper amendments (Cu₉₀₀ mg kg^-1) which was 86.41 %, while no much change was observed in the essential oil yield of M. arvensis L. after copper amendments. Thus, aromatic and medicinal plants can be cultivated in the metal-polluted site.

摘要

薄荷L.是高度重视芳香植物之一由于其发现在食品，香精和制药行业广泛应用它的精油。甲大棚研究以确定铜对精油组合物中的效果M.荬铜为270，500，700和900毫克公斤L.修订^-1与未修改的控制沿一式三份。90天后，收获植物的地上部分，进行水蒸馏并通过GC和GC-MS进行分析。分析显示存在39种化合物，其中在对照品中鉴定出22种化合物，占总油类的96.86％。在未经改良的土壤中生长的植物油中主要鉴定出的成分是薄荷醇（84.64％）和薄荷酮（4.19％），异薄荷酮（2.23％），乙酸薄荷酯（1.02％）和and啶D（1.10％）为次要成分。对于Cu ₂₇₀，Cu ₅₀₀，Cu ₇₀₀，Cu ₉₀₀ mg kg ^-1含量的修订，鉴定出二十，十七，十七和十七种化合物，分别占总提取油的97.80％，97.56％，96.01％和96.96％。所有油样中的主要成分是薄荷醇。发现较高含量的铜修饰剂（Cu ₉₀₀ mg kg ^-1）的薄荷醇的定量变化最高，为86.41％，而欧文分支杆菌的精油产量未见太大变化。L.铜修改后。因此，可以在金属污染的地方种植芳香和药用植物。