Chemotypes in the Volatiles of Wild Thyme (<i>Thymus pulegioides</i>L.)

Michet, A.; Chalchat, Jean‐Claude; Figuérédo, Gilles; Thébaud, Gilles; Billy, François; Pétel, Gilles

doi:10.1080/10412905.2008.9699964

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…Literature data also demonstrate similar tendencies of α-TA chemotype occurrence. As dominated compound α-TA was found in essential oils of six T. pulegioides samples growing wild in subalpine location at Puy-de-I’Angle (Massif Central, France) only at altitude of 1700 m indicating 64.8–81.4% of essential oils in these samples [ 29 ]. Therefore, a search of T. pulegioides α-TA chemotype plants, as resource of natural α-TA, would be suitable in regions with continental climate and in slopes with southern exposure since this chemotype is expecting to accumulate more α-TA in essential oil in these conditions.…”

Section: Discussionmentioning

confidence: 99%

“…However, there is still not enough research has been done about the occurrence of α-TA chemotype in T. pulegioides . A. Michet with co-authors demonstrated that α-TA was dominant compound in essential oils of T. pulegioides, which is growing wild in subalpine zone at 1700 m in France; interestingly, it was observed that α-TA chemotype was not growing in habitats where phenolic chemotypes were growing [ 29 ]. D. Mockutė and G. Bernotienė found α-TA chemotype in T. pulegioides in Vilnius region of Lithuania [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

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α-Terpinyl Acetate: Occurrence in Essential Oils Bearing Thymus pulegioides, Phytotoxicity, and Antimicrobial Effects

et al. 2021

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The aim of this study was to evaluate occurrence of T. pulegioides α-terpinyl acetate chemotype, as source of natural origin α-terpinyl acetate, to determine its phytotoxic and antimicrobial features. Were investigated 131 T. pulegioides habitats. Essential oils were isolated by hydrodistillation and analyzed by GC-FID and GC-MS. Phytotoxic effect of essential oil of this chemotype on monocotyledons and dicotyledons through water and air was carried out in laboratory conditions; the broth microdilution method was used to screen essential oil effect against human pathogenic microorganisms. Results showed that α-terpinyl acetate was very rare compound in essential oil of T. pulegioides: it was found only in 35% of investigated T. pulegioides habitats. α-Terpinyl acetate (in essential oil and pure) demonstrated different behavior on investigated plants. Phytotoxic effect of α-terpinyl acetate was stronger on investigated monocotyledons than on dicotyledons. α-Terpinyl acetate essential oil inhibited seeds germination and radicles growth for high economic productivity forage grass monocotyledon Poa pratensis, but stimulated seed germination for high economic productive forage legume dicotyledon Trifolium pretense. α-Terpinyl acetate essential oil showed high antimicrobial effect against fungi and dermatophytes but lower effect against bacteria and Candida yeasts. Therefore, T. pulegioides α-terpinyl acetate chemotype could be a potential compound for developing preventive measures or/and drugs for mycosis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

α-Terpinyl Acetate: Occurrence in Essential Oils Bearing Thymus pulegioides, Phytotoxicity, and Antimicrobial Effects

et al. 2021

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“…The cluster analysis showed that α-terpinyl acetate was dominated only in three habitats of T. pulegioides and linalool—in two habitats ( Table 2 , Figure 2 ). There is evidence that the linalool chemotype of T. pulegioides dominates in some one habitats in Poland and Slovakia [ 2 , 47 ], α-terpinyl acetate—in habitats of subalpine locations in France [ 4 ]. Found max percentages of linalool and α-terpinyl acetate were 1.2–1.4 time higher than the max percentages of carvacrol and geraniol ( Table 1 ), i.e., habitats with the domination of linalool or α-terpinyl acetate chemotypes are very rare.…”

Section: Discussionmentioning

confidence: 99%

“…The main volatile compounds of T. pulegioides are thymol, carvacrol, geraniol, linalool, α-terpinyl acetate, fenchone, and cis-sabinene hydrate. These compounds can amount significant percentages in essential oils (as well as determinate chemotypes of T. pulegioides ) [ 2 , 3 , 4 ], are biologically active and have a fairly wide range of application. The monoterpenic phenol thymol together with isomer carvacrol have wide spectrum of antioxidant and antimicrobial activity, therefore, are widely used in pharmaceutical and food industries [ 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Edaphic and Climatic Factors on Thymus pulegioides Essential Oil Composition and Potential Prevalence of Chemotypes

Vaičiulytė

Ložienė

Taraškevičius

2022

Plants

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Intraspecific chemical polymorphism is characteristic of essential oil bearing Thymus pulegioides (Lamiaceae). Soil chemical composition and climatic conditions can influence not only quantitative and qualitative composition of essential oils, but also on prevalence of different chemotypes in space. The purpose of study was to determine the impact of edaphic and climatic factors on T. pulegioides essential oil composition and potential chemotypes prevalence. It were investigated 131 habitats of T. pulegioides in all ten climatic sub-districts of Lithuania. Essential oils were isolated by hydrodistillation and analysed by GC-FID and GC-MS. The content of humus was estimated by oxidation method, the content of mobile potassium (K2O) and mobile phosphorus (P2O5)—flame photometry using 0.2 M HCl solution, the soil pH—electrometrically and 15 elements of soil—by energy-dispersive X-ray fluorescence. The meteorological data (temperature, rainfall, photosynthetically active solar radiation and sunshine duration) were obtained from the meteorological bulletins. Results showed that humus in soil positively, manganese and cobalt—negatively influenced on the essential oil accumulation in T. pulegioides. Carvacrol was the most common compound in the essential oil of T. pulegioides; higher amounts of sulphur and mobile phosphorus, lower amounts of sodium in soil, higher rainfall in blooming period are favourable for this compound and for potential prevalence of carvacrol chemotype. Geraniol was frequent in the eastern and the central part of Lithuania, where the temperature in vegetation season is higher, and in soils characterised by higher and lower amounts of sodium and chlorine, respectively. Thymol, linalool and α-terpinyl acetate were rare. Edaphic and climatic conditions can differently influence on essential oil yield and chemical composition of species as well as on potential prevalence of different chemotypes of same species in space.

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“…Chemical polymorphism is a characteristic of large thyme ( Thymus pulegioides L.) with thymol, geraniol, linalool, α-terpenyl acetate, fenchone, cis-sabinene hydrate, and most frequently carvacrol chemotypes found in Europe [ 6 , 7 , 8 , 9 , 10 ]. Previous research has demonstrated that the geraniol chemotype is also frequently found in T. pulegioides , growing in eastern and south-eastern regions of Lithuania and in Slovakia [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Geraniol and Carvacrol in Essential Oil Bearing Thymus pulegioides: Distribution in Natural Habitats and Phytotoxic Effect

Ložienė

Vaičiulytė

2022

Molecules

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Phenolic and non-phenolic chemotypes of Thymus pulegioides 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 T. pulegioides, growing wild in Lithuania, and compare phytotoxity of essential oils of carvacrol and geraniol chemotypes on selected plant species. In investigating 131 T. pulegioides 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 Hypericum perforatum L. and the important forage grass Phleum pratense L. were respectively selected for experimentation from among 35 medicinal plants and 10 feed Poaceae species, growing in T. pulegioides 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 P. pratense seed germination by the essential oil of the geraniol chemotype than the carvacrol chemotype. None of the H. perforatum 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 T. pulegioides chemotypes have contrasting phytotoxic effects on neighboring plants within their natural habitats.

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Chemotypes in the Volatiles of Wild Thyme (Thymus pulegioidesL.)

Cited by 10 publications

References 8 publications

α-Terpinyl Acetate: Occurrence in Essential Oils Bearing Thymus pulegioides, Phytotoxicity, and Antimicrobial Effects

α-Terpinyl Acetate: Occurrence in Essential Oils Bearing Thymus pulegioides, Phytotoxicity, and Antimicrobial Effects

Impact of Edaphic and Climatic Factors on Thymus pulegioides Essential Oil Composition and Potential Prevalence of Chemotypes

Geraniol and Carvacrol in Essential Oil Bearing Thymus pulegioides: Distribution in Natural Habitats and Phytotoxic Effect

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