Chemotaxonomic value of the essential oil compounds in species of Teucrium pumilum aggregate

Pérez, Isabel Blasco; Blázquez, María Amparo; Boira, Herminio

doi:10.1016/s0031-9422(00)00345-9

Cited by 21 publications

(8 citation statements)

References 6 publications

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“…However, detailed studies of the morphological variability of these taxa suggest the existence of five differentiated species: T. pumilum, T. turredanum, T. libanitis, Teucrium carolipaui Vicioso ex Pau, and Teucrium lepicephalum Pau, all included in the Pumilum subsection (Polium section) (RivasMartı´nez, 1974). Recently, the essential oil compounds of these taxa have been studied with biosystematic purposes, supporting their classification at the species level (Pe´rez et al, 2000).…”

Section: Introductionmentioning

confidence: 91%

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

et al. 2006

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Teucrium pumilum L., T. lepicephalum Pau, T. libanitis Schreber, T. turredanum Losa & Rivas Goday, and T. carolipaui Vicioso ex Pau (Labiatae) constitute an aggregate included in the Pumilum subsection (Polium section). These species are endemic and geographically restricted to central and south-eastern Spain. They grow under different climatic conditions and have different edaphic requirements, particularly the gypsum and lime affinities. The effects of some ecological factors (i.e. edaphic and climatic factors) on the germination parameters of these Teucrium species were investigated. The species under study differed in their germination behaviour. The majority of the germination parameters appeared more correlated to edaphic than to climatic factors and particularly to the water availability in the soil. The calcicolous T. carolipaui, which grows in the driest habitat, had a more rapid germination than the gypsophilous species. This could be due to the existence of a narrower optimal germination period for T. carolipaui. The different germination requirements of these species of Teucrium are important results to be considered in conservation programs of these endemic and endangered taxa.

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Section: Introductionmentioning

confidence: 91%

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

et al. 2006

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“…[10][11][12] The percentage composition of the identified compounds was computed from the GC peak area without any correction factor and was calculated relatively.…”

Section: Identification Of Componentsmentioning

confidence: 99%

The essential oil composition ofTeucrium chamaedrys L. from Iran

Morteza‐Semnani

Akbarzadeh²,

Rostami

2005

Flavour Fragr. J.

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Isolation of the Essential OilThe air-dried flowering aerial parts of T. chamaedrys (100 g) were subjected to hydrodistillation using a Clevenger-type apparatus for 5 h. The oil was dried over anhydrous sodium sulphate and stored in a sealed vial at low temperature before analysis. The oil was analysed by GC and GC-MS analysis. Gas Chromatography (GC)Gas chromatographic analysis was carried out on a Perkin-Elmer 8500 gas chromatograph with FID detector and a DB-5 capillary column (30 m × 0.25 mm i.d., film thickness 0.25 µm). The operating conditions were as follows: carrier gas, helium, at a flow rate of 2 ml/min; oven temperature, programmed to 4 min isothermal at 60°C and then 60-220°C at 4°C/min; injector and detector temperatures were set at 240°C. Gas Chromatography-Mass Spectrometry (GC-MS)A Hewlett-Packard 6890 series instrument was used, with a DB-5 capillary column (30 m × 0.25 mm i.d., film thickness 0.25 µm), and was programmed as follows: 60°C for 5 min and then up to 220°C at 4°C/min. The carrier gas was helium at a flow rate of 2 ml/min; split ratio, 1:40; ionization energy, 70 eV; scan time, 1 s; acquisition mass range, m/z 40-400.

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“…different phenotypes), a variability that can be used to classify samples of unknown origin 1 or genotype 2,3 by applying multivariate statistics, such as principal component analysis (PCA) or canonical discriminant function analysis (CDA). Quality, 4 chemotaxonomic 5 or chemotypical 6,7,8 classifications are possible by applying these techniques.…”

Section: Introductionmentioning

confidence: 99%

Determination of growing location of marjoram (Origanum majorana L.) samples by comparison of essential oil proﬁles

Novak

Pank

Langbehn

et al. 2004

Flavour & Fragrance J

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A canonical discriminant function analysis (CDA) was applied to essential oil compounds profiles to determine the growing location of marjoram samples. 12/21 essential oil compounds were integrated into two discriminant functions as the best predictors for geographical differences. Stepwise integration allowed the determination of the essential oil compounds mainly responsible for the geographical variation, viz. myrcene, terpinene-4-ol, γ-terpinene and p-cymene. The two discriminant functions themselves showed a strong association between the locations and the predictors. The two functions allowed a correct classification of 95% of samples (cross-validated). The high positive classification rate demonstrates the CDA's ability as a quality assurance tool enabling authenticity control.

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Chemotaxonomic value of the essential oil compounds in species of Teucrium pumilum aggregate

Cited by 21 publications

References 6 publications

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

Ecological germination requirements of the aggregate species Teucrium pumilum (Labiatae) endemic to Spain

The essential oil composition ofTeucrium chamaedrys L. from Iran

Determination of growing location of marjoram (Origanum majorana L.) samples by comparison of essential oil proﬁles

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