Nature Research Centre, Institute of Botany, Žaliųjų Ežerų Str. 47, LT-08406 Vilnius, Lithuania.
Molecules. 2022 Feb 1;27(3):986. doi: 10.3390/molecules27030986.
Phenolic and non-phenolic chemotypes of L. are common in Europe. Essential oils of these chemotypes, as various compositions of allelochemicals, can have different phytotoxic effects on neighboring plants in natural habitats. The aim of this study was to establish the distribution of carvacrol and geraniol in , growing wild in Lithuania, and compare phytotoxity of essential oils of carvacrol and geraniol chemotypes on selected plant species. In investigating 131 habitats, essential oils were isolated by hydrodistillation and analyzed by GC-FID and GC-MS. Phytotoxity of essential oils extracted from carvacrol and geraniol chemotypes transmitted through water and air to selected plants was determined under laboratory conditions. Pharmacologically valuable L. and the important forage grass L. were respectively selected for experimentation from among 35 medicinal plants and 10 feed Poaceae species, growing in habitats. Field results showed that carvacrol is common throughout Lithuania's territory, whereas the geraniol is predominantly located under the continental climatic conditions of the eastern region of the country. In the laboratory experiment, it was established that there was stronger inhibition of seed germination by the essential oil of the geraniol chemotype than the carvacrol chemotype. None of the seeds germinated after exposure to the essential oil of the geraniol chemotype. In general, this study builds on previous studies by providing further evidence that different chemotypes have contrasting phytotoxic effects on neighboring plants within their natural habitats.
欧洲常见的有酚类和非酚类化学型的。这些化学型的精油，作为各种化感物质的组成成分，可能对自然栖息地中邻近植物产生不同的植物毒性效应。本研究的目的是确定生长在立陶宛野外的野生 的香芹酚和香叶醇的分布，并比较香芹酚和香叶醇化学型精油对选定植物物种的植物毒性。在调查了 131 个生境后，通过水蒸馏法分离精油，并通过 GC-FID 和 GC-MS 进行分析。在实验室条件下，通过水和空气从香芹酚和香叶醇化学型提取的精油对选定植物的植物毒性进行了测定。在 35 种药用植物和 10 种饲料禾本科植物中，分别从 种药用植物和 10 种饲料禾本科植物中选择具有药理学价值的 和对牲畜重要的 进行实验。实地调查结果表明，香芹酚在立陶宛全境都很常见，而香叶醇主要分布在该国东部大陆性气候条件下。在实验室实验中，发现香叶醇化学型精油对种子萌发的抑制作用比香芹酚化学型更强。没有一颗种子在接触香叶醇化学型精油后发芽。总的来说，这项研究在前人的基础上进一步证明了不同的化学型对其自然栖息地中邻近植物具有相反的植物毒性效应。
