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Antioxidant and Antimicrobial Activities of the Essential Oil of Achillea millefolium L. Grown in France

Laboratoire de Chimie Agro-Industrielle, Université Fédérale de Toulouse Midi-Pyrénées, INP-ENSIACET, Toulouse 31030, France
Unité Mixte 134 Processus Infectieux en Milieu Insulaire Tropical, Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249. Plateforme Technologique CYROI, Sainte Clotilde 97490, France
Department of Food Technology, Kaunas University of Technology, Radvilènu pl. 19, LT-50254 Kaunas, Lithuania
Laboratoires Agronutrition SAS, 3 allée de l’Orchidée Carbone 31390, France
Author to whom correspondence should be addressed.
Medicines 2017, 4(2), 30;
Received: 20 February 2017 / Revised: 27 April 2017 / Accepted: 15 May 2017 / Published: 19 May 2017


Background: This study aimed to examine the composition of essential oil (EO) of A. millefolium aerial parts wild plant grown in France and evaluate its antioxidant, antibacterial, and antifungal activities. Methods: GC-MS was used to identify the chemical composition of EO. Antioxidant activity (AA) of EO was evaluated by Oxipres method. Antimicrobial activity of EO was evaluated by Agar-well diffusion and a broth microdilution assay. Results: Forty-three volatile compounds were identified. Major compounds were camphor (12.8%), germacrene-D (12%), (E)-nerolidol (7.3%), sabinene (6.7%), (E)-p-mentha-2,8-dien-1-ol (4.5%), and 1,8-cineole (4%). EO shows strong AA against Sunflower oil oxidation. Additionally, an inhibitory effect against microbial organisms (bacteria and fungi) was found. Conclusion: The EO composition of A. millefolium chemotype located in France was studied. The EO of the A. millefolium wild plant grown in France is quite an effective antioxidant in sunflower oil oxidation; it also possesses inhibitory effects against famous bacteria and fungi.

1. Introduction

The global interest in food preservation has been recently greatly increased due to high economic costs of deterioration and poisoning of food products through lipid oxidation as well as food pathogens. Currently, there is a growing interest in prolonging shelf-life and the safety of food using natural antioxidant and antimicrobial compounds. This aspect assumes particular relevance due to an increased resistance of some bacterial and fungi strains to the most common antibiotics and antimicrobial synthetic agents [1]. Essential oils or some of their components have been largely used in perfumes, in sanitary products, in dentistry, in agriculture, as food preservers and additives, and as naturals remedies [2].
Mostly found in Europe, Asia, and temperate regions including North America, the Achillea genus, belonging to Asteraceae family, is represented by about 85 species [3]. A. millefolium (common yarrow) has been used in many applications such as medicine, veterinary science, and cosmetics [4]. The flowering herbs were reported as possessing tonic, antispasmodic, vulnerary, and diaphoretic activities, among others, and therefore is recommended for colds, flatulence, hysteria, and rheumatism treatments [5]. The chemical composition of A. millefolium oils from Québec [6], India [7], Turkey [3], Iran [8], and European countries (Macedonia, Italy, Lithuania, Hungary, Greece, Moldavia, Latvia, Germany Estonia, Belgium, France, Russia, Armenia, Spain, and Bulgaria) [9,10,11,12,13,14] has been reported in previous studies. However, the reports on antioxidant and antimicrobial properties of A. millefolium EO are rather scarce. Considering remarkable chemical polymorphism, which is characteristic of many essential oil-bearing plants, it is of interest to determine the chemical composition and biological activities of plant varieties growing in different regions.
Therefore, the aim of this study was to investigate the antioxidant, the antibacterial, and the antifungal activities of EO of A. millefolium aerial parts of French origin. Additionally, this study aims to inspect the chemical profile of A. millefolium EO grown in France and to compare this profile to previous studies where the EO of A. millefolium was obtained from other countries.

2. Materials and Methods

2.1. Plant Material

The aerial parts of wild Achillea millefolium L. plant were picked in May 2008 at the bloom stage from Toulouse (43°36′01′′ N, 1°25′58′′ E), France. The voucher specimens were deposited in the Herbarium of the Pharmacognosy Laboratory, Faculty of the Pharmaceutical Sciences, Université de Toulouse III, N° (AST. 251 (2008) (I.F.)).

2.2. EO Extraction

Five hundred grams (500 g) of fresh areal plant parts at flowering stage were blended with 4 L of distilled water and submitted to water-distillation in a modified Clevenger-type apparatus for 3 h. After distillation, the collected oil was isolated from the water and dried over sodium sulfate (water free). Six replicate distillations were performed and the EO was stowed at 4 °C before analysis.

2.3. Gas Chromatography Coupled with Mass Spectrometry Analysis (GC-MS)

The EO was solvated in n-pentane (Sigma-Aldrich, St Quentin Fallavier, France) (10% v/v) and construed on a Clarus 500 (Perkin Elmer Instruments, Shelton, USA) gas chromatograph outfit with a fused-silica capillary column HP-5MS (5% diphenyl 95% dimethyl polydimethylsiloxane, 30 m length, 0.25 mm id, 0.25 µm film thickness (J&W scientific, Folsom, CA). Flame ionization detector (FID) (Perkin Elmer Instruments, Shelton, CT, USA) was used. The importer gas was helium (1.3 mL/min flow). The injection volume was 0.5 µL. Injector temperature was 250 °C and under split mode at a ratio of 1:5. The temperature of FID was 250 °C. The furnace temperature was programmed at 60 °C for 5 min, grated to 250 °C at 5 °C/min and maintained at 250 °C for 5 min. The identification of compounds was built on retention indices (RI) qualified to C5-C18 n-alkanes (Sigma-Aldrich, St Quentin Fallavier, France) and available literature data [15,16] and on computer matching of obtained fragments from mass spectrum with those present in NIST 2008 and WILEY 275L MS libraries. Results are the mean from at least three independent experiments performed in six replicates.

2.4. Evaluation of AA of EO by the Oxipres Method

The preparation of samples is obtained by mixing sunflower oil with 0.05% or 0.1% or 0.2% amounts of EO. In the Oxipres apparatus (Mikrolab, Aarhus, Denmark), 5 g of sunflower oil were placed inside a reactor tube heated at 110 °C under an oxygen pressure of 5 bar. The variations in pressure occurred were recorded. The control sample not contain additive. After the addition of each dose of EO, all variations of induction period (IP) of sunflower oil were collected with time (h). 3,5-di-tert-4-butylhydroxytoluene (BHT) (Sigma-Aldrich, St. Quentin Fallavier, France) was used as a positive control. The AA of EO and the protection factor (PF) variations of sunflower oil were determined by Equations (1) and (2):
P F = I P x I P k
A A = I P x I P k I P B H T I P k
where IPX is the induction period of the sample with additive, IPK is the induction period of the sample without additive, IPBHT is the induction period of the sample with synthetic antioxidant BHT.

2.5. Assessment of Antibacterial Effect of EO

Two types of bacteria were tested; (1) Gram-positive—Bacillus subtilis ATCC6633, Bacillus cereus ATCC10876, Staphylococcus aureus ATCC25923, and Staphylococcus epidermidis ATCC12228—and (2) Gram-negative pathogens Salmonella typhimurium ATCC14028, Salmonella typhimurium DS88, Salmonella enteritidis ATCC13076, Salmonella agona ATCC43889, and Escherichia coli ATCC25922 were kindly donated by Dr. A. Šarkinas (Food Institute of Kaunas University of Technology, Kaunas, Lithuania).

2.5.1. Agar Well Diffusion Method

Antibacterial assay was carried using agar well diffusion. The bacteria were cultured for 18 h at 37 °C on the slant agar (Oxoid, CM325). Adjustment of washed cell bacteria was carried out according to McFarland No. 0.5 standard [17]. Into 90 mm diameter Petri plates, 10 mL of each bacteria culture were pipetted. To fill the wells (6 mm in diameter), agar was pressed with 10 µL of ethanolic solutions contained 5 µg/mL of EO. Ethanol was used to dissolve the oil for negative controls preparation. Susceptibility test disc Ceftazidime/Clavulanic Acid, CAZ-CLA, 30/10 µg (BBL, CAZ/CLA, 231753) was used as a positive control. Incubation time of plates was 24 h at 37 °C. Antibacterial effect was assessed by the diameter of clear zones developed around wells. Results are the mean (±SEM) from at least three independent experiments performed in triplicates.

2.5.2. Determination of Minimum Inhibitory Concentrations (MICs)

MIC was determined on the base of a microdilution broth susceptibility test [18]. All tests were made in Mueller Hinton Broth (MHB; BBL) (Microbiology Systems, Inc., Cockeysville, MD, USA) supplemented with Tween 80 detergent (Fisher, Illkirch, France) to achieve a final concentration of 0.5% (v/v). The culture of bacteria was made overnight at 37 °C in Mueller Hinton Agar, MHA (Sigma-Aldrich, St. Quentin Fallavier, France). To obtain a final density of 5 × 105 cfu/mL, tests were hanging in MHB. To obtain a final concentration values reaching from 0-1000 µg/mL of EO in MHB, dilutions were prepared in a 96-well microplates (Sarstedt, Nümbrecht, Germany). Growth control was (MHB + Tween 80) and sterility control was (MHB + Tween 80 + sample). The microplates were smoldered at 37 °C during 24 h. A microplate reader (Multiskan Ascent, Thermo Fisher Scientific, Loughborough, UK) was used to the bacterial growth determination. The reading absorbance was 620 nm. The MICs represent the concentrations of EO causing at least 50% growth inhibition of the bacterial strains. Results are the mean (±SEM) from at least three independent experiments performed in triplicates.

2.6. Assessment of Antifungal Activity of EO

The fungi samples were obtained from the Leibniz Institute (DSMZ, Braunschweig, Germany). The fungal species tested in this study were Botrytis cinerea DSM-5144, Rhizopus stolonifer DSM-2194, Verticillium dahliae DSM-11938, Aspergillus niger DSM-1957, and Colletotrichum gloeosporioides DSM-62146. The culture of fungal species was made on Potato-Dextrose-Agar (PDA) slants purchased from VWR (Strasbourg, France). The storage temperature was 4 °C. After 10 days of culture, the fungi spore were obtained, then blended with sterile distilled water to get a spore suspension of 1 × 108 spore/mL. The concentrations of EO solutions were reached from 0.1 to 3 mg/mL. The disc diffusion method [16] was adopted to evaluate the antifungal activity. Five microliters (5 µL) of EO was used. Inhibition percent was obtained by Equation (3):
I n h i b i t i o n   ( % ) = 1 r a d i a l   g r o w t h   o f   t r e a t m e n t   r a d i a l   g r o w t h   o f   c o n t r o l   × 100 .
MIC value was obtained from the equation of the line (% inhibition against concentration). The lower MIC value shows better antifungal activity. All antifungal results are the mean (±SEM) from at least three independent experiments performed in triplicates.

3. Results and Discussion

3.1. Composition of EO

The yellow greenish EO isolated from French A. millefolium aerial parts possessed a strong characteristic odor. The EO yield was 0.07% (Fresh weight), which is 5 t higher than reported for Indian origin (0.014%) [5], 3 t lower than in Canadian samples (0.21%) [6].
Forty-three compounds were identified in A. millefolium EO amounting 96.3% of the total EO (Table 1). Oxygenated monoterpenes constituted the major part of the EO (40.7%), with camphor (12.8%), trans-chrysantenyl acetate (6.6%), terpinen-4-ol (4.70%), (E)-p-mentha-2,8-dien-1-ol (4.5%), and 1,8-cineole (4.0%) being its main components. Other quantitatively important fractions were hydrocarbon sesquiterpenes (17%) and oxygen-containing sesquiterpenes (19.5%), germacrene-D (12.0%) and (E)-nerolidol (7.3%) being the main components. The monoterpene part corresponded only to 15%, sabinene (6.7%) and β-pinene (3.4%) being its main constituents.
It may be observed that the main components of A. millefolium analyzed in our study to some extent were comparable to those previously reported [7,8,9,10,11,12]. However, the content of such components as hexane-2,3-dione, hex-3-en-1-ol, methyl hexanoate, (E)-p-mentha-2,8-dien-1-ol, (Z)-p-menthan-2-one, thymol acetate, (E)-methyl isoeugenol, β-cedrene epoxide, and patchouli alcohol in the oil of A. millefolium analyzed in our study was considerably higher than in the previously studied yarrow oils. Camphor (up to 20%), α and β-thujones (up to 26.8%), 1,8-cineole (up to 20.3%), artemisia ketone (up to 10.1%), and chamazulene (up to 0.8%) were reported in A. millefolium oil from France [12], but the content of these compounds in our study was rather different; it contained 12.8% camphor, 4.5% (E)-p-mentha-2,8-dien-1-ol, 4.7% terpinen-4-ol, 4.0% 1,8-cineole, and 1.8% borneol, whereas artemisia ketone, thujones, and chamazulene were not detected.
A completely different A. millefolium chemotype was reported in the Saguenay region around Quebec in Canada where the β-thujone was the main compound (13.8%) [6]. The sesquiterpene alcohols spathulenol, (Z)-nerolidol, α-bisabolol, and (E,E)-farnesol were dominant constituents in the A. millefolium oil from Iran [8]. These results confirm that the chemical polymorphism is a characteristic feature of yarrow. The variations in the chemical profile of the A. millefolium oil as a consequence of ontogenesis and organic differentiation were recently noted [19]. The influence of ecological factors (climate, altitude, association, nutrients, etc.) seems to be an important factor; in addition to the like chemotype, variations in EO chemical composition could exist.

3.2. AA of EO Against Sunflower Oil Oxidation

Plant oils containing sensitive to oxidative degradation unsaturated fatty acids have been widely used as substrates for testing AA. The ability of A. millefolium EO to protect the sunflower oil was evaluated by comparing with synthetic antioxidant BHT in Oxipres apparatus. The effect of additives was expressed as a protection factor (PF) indicating the increase in sunflower oil stability (Table 2). The addition of 0.2% of A. millefolium EO increased the stability of sunflower oil about 1.5 t (the IP of sunflower oil without additives was 2.9 h). A. millefolium oil prolonged the IP of sunflower oil oxidation depending on the concentration; the highest concentration of additive (0.2%) was more effective than BHT applied at 0.02% (Table 2). AA of other EO plant species in sunflower oil was previously evaluated by the Oxipres method; for instance, Calamintha grandiflora applied at 0.2% demonstrated PF of 1.63 [20]. In conclusion, A. millefolium EO stabilized the oxidation of sunflower oil. This stability of oil rose with the added amounts of EO.

3.3. Antibacterial Activity of EO

Antibacterial effect of EO was evaluated in vitro against nine pathogenic bacteria species (Table 3). Gram-positive bacteria were more delicate to the EO than Gram-negative bacteria. B. cereus was the most susceptible bacteria to A. millefolium oil at the applied concentrations (5 and 10 µg/mL). The smallest inhibition zones were obtained in S. typhimurium and S. agona cultures while St. epidermidis, S. enteritidis, and E. coli were resistant against all concentrations of A. millefolium oil. MIC for B. cereus and St. aureus were 100 and 120 µg/mL, respectively; while the MIC for B. subtilis was 310 µg/mL. Among the Gram-negative tested bacteria, a remarkable antibacterial effect was observed only for S. typhimurium and S. agona with their respective MIC values 2000 and 1000 µg/mL. The effect of A. millefolium oil from Turkey [3] was also tested against St. aureus and B. cereus; it was found that the MIC was 72 mg/mL, which is remarkably higher than the MIC of A. millefolium oil measured in our study. As was shown, the composition of A. millefolium oils from various locations may be rather different. The properties and the content of individual constituents may have an important power on the antibacterial effect of oil against different bacteria species. For instance, sabinene, 1,8-cineole, and camphor, which were abundant in A. millefolium oil studied in this work, are well-known natural chemicals with antibacterial potentials [21]. The EO also studied in our work also contained 12% of germacrene-D and 7.3% of (E)-nerolidol, which were absent in the Turkish oil. The antibacterial activities of germacrene-D and (E)-nerolidol were previously reported as well [22].

3.4. Antifungal Activity of EO

EO of A. millefolium showed remarkable antifungal activity against all plant fungi tested (Table 4) at 5 µL (1000 ppm/disc). It exhibited an inhibitory result on the development of R. stolonifer (65.7%) V. dahliae (56.3%), C. gloeosporioides (60.9%), Botrytis cinerea (50.8%), and Aspergillus niger (40.7%). The inhibitory effects might be related to the presence of mono- (55.7%) and sesquiterpenes (36.5%) in the EO [23].
The MICs defined as the deepest concentrations of the EO that allows for full progress inhibition of R. stolonifer, V. dahliae, C. gloeosporioides, B. cinerea, and A. niger were 1.6, 3.1, 3.4, 3.6, and 4.7 mg/mL, respectively (Table 5). R. stolonifer was discovered to be the greatest sensitive fungal pathogens towards the A. millefolium EO.

4. Conclusions

In conclusion, the EO of A. millefolium, growing wild in the Midi-Pyrenees region, possesses quite a unique chemical composition as compared with the oil composition of the same species reported in previously published studies. α-Pinene, sabinene, camphor, trans-chrysanthenyl acetate, cyclocitral isomers, and germacrene D were the main components indicating an individual chemotype of the studied plant sample. The EO of A. millefolium was quite an effective antioxidant preserving oxidation of sunflower oil; it also possessed inhibitory effects against tested bacteria and fungi. The EO of A. millefolium growing wild in the Toulouse region show a varied interval of activities against plant fungi. In our study, it has become clear that the EO of A. millefolium possesses an important ability to intensely inhibit the development of B. cinerea with other plant fungi tested in this work. These results provide preliminary support for the potential uses of A. millefolium essential oil for the prolongation of shelf-life and the safety of food preparations possessing specific odor properties, as well as antioxidant and antimicrobial activities.


This study was performed in the framework of bilateral French-Lithuanian program “Gilibert” (grant n°19981WG/2009/2010), supported by Research Council of Lithuania (grant no. TAP-47/2010 and TAP-11/2010) and the French Research Minister.

Author Contributions

C.R. and T.T. conceived the study, C.E.-K., P.R.V., C.R. and T.T. designed the experiments, B.Z., O.M. and C.E.-K. conducted the experiments, C.R., P.R.V., C.E.-K., B.Z., O.M. and T.T. analyzed the results, B.Z. and C.E.-K. wrote the manuscript, P.R.V. and T.T. acquired the funding.

Conflicts of Interest

The authors declare no conflict of interest.


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Table 1. Chemical composition of EO of wild Achillea millefolium L. (aerial parts) from Toulouse region, France.
Table 1. Chemical composition of EO of wild Achillea millefolium L. (aerial parts) from Toulouse region, France.
No.CompoundsRI aRI b(%) cRSD d
3Methyl hexanoate9269270.25.68
11γ-Terpinene 105810601.77.93
21(Z)-p-Menthan-2-one 119811961.54.56
22trans-Chrysanthenyl acetate122812386.61.76
23Bornyl acetate128512891.25.60
24Thymol acetate135513520.76.27
28Germacrene-D 1483148512.03.97
29(E)-Methyl isoeugenol149614921.03.72
35Caryophyllenyl alcohol157415720.84.00
37Caryophyllene oxide159615831.94.34
39β-Cedrene epoxide162516230.54.62
42Patchouli alcohol166916580.83.90
Totalcompounds 96.30
Oxygenated monoterpenes 40.70
Oxygenated sesquiterpenes 19.5
Hydrocarbon sesquiterpenes 17
Monoterpenes 15
Other 4.1
a calculated retention indices; b literature values of retention indices [15,16]; c relative% of the compounds gated from FID area percent data; d RSD: Relative Standard Deviation (n = 6).
Table 2. AA of Achillea millefolium L. essential oil evaluated in sunflower oxidation test (Oxipres method).
Table 2. AA of Achillea millefolium L. essential oil evaluated in sunflower oxidation test (Oxipres method).
AdditiveConcentration %Protection Factor (PF) aAntioxidant Activity (AA) bInduction Period (IP) cRSD d
Without additive0.001.00-2.900.30
Essential oil0.201.711.514.960.50
Essential oil0.101.290.623.741.00
Essential oil0.051.170.363.390.40
a PF = IP(sample with additive)/IP(sample without additive); b AA was determined by comparison with the reference (BHT 0.02%); c IP = time when the pressure start to reduce suddenly; d RSD: the relative standard deviation (n = 3).
Table 3. Antibacterial activity of Achillea millefolium L. EO against bacterial pathogens.
Table 3. Antibacterial activity of Achillea millefolium L. EO against bacterial pathogens.
MicroorganismGram +/−Inhibition Zone Diameter (mm) aEssential Oil
Essential Oil bAntibiotic cMIC d
10 µg/mL5 µg/mL(30/10) µgµg/mL
B. subtilisG+11.0 ± 0.28.6 ± 0.116.8 ± 0.1310 ± 20
B. cereusG+13.6 ± 0.210.7 ± 0.229.0 ± 0.2100 ± 10
St. aureusG+12.8 ± 0.19.1 ± 0.221.0 ± 0.3120 ± 12
St. epidermidisG+na ena25.8 ± 0.1na
S. typhimuriumG−9.2 ± 0.2na31.2 ± 0.32000 ± 40
S. typhimuriumG−nana34.0 ± 0.1na
S. enteritidisG−nana32.2 ± 0.3na
S. agonaG−10.4 ± 0.49.1 ± 0.320.8 ± 0.31000 ± 40
E. coliG−nana26.4 ± 0.2na
± was an SD from at least three independent trials; a Diameter of inhibition area; b Each well contained 10 µL of ethanolic solution of essential oil (10 and 5 µg/mL); c Ceftazidime/Clavulanic Acid (30/10 µg/disc) was a positive control; d MIC: minimum inhibitory concentration (values in µg/mL); e na: no activity.
Table 4. Antifungal activity of Achillea millefolium L. EO (5 µL corresponding to 1000 ppm/disc).
Table 4. Antifungal activity of Achillea millefolium L. EO (5 µL corresponding to 1000 ppm/disc).
Fungal StrainMycelial Growth Inhibition a
Essential Oil
R. stolonifer11.5 ± 1.465.7 ± 2.2
V. dahliae10.1 ± 1.465.3 ± 2.6
C. gloeosporioides12.2 ± 1.460.9 ± 2.5
B. cinerea18.4 ± 1.450.8 ± 3.8
A. niger24.8 ± 0.840.7 ± 0.5
± was an SD from at least three independent trials; a expressed in mm from radial evolution; % of radial growth inhibition.
Table 5. Minimum inhibitory concentration (MIC) of A. millefolium L. EO.
Table 5. Minimum inhibitory concentration (MIC) of A. millefolium L. EO.
Fungal StrainMIC a
Rhizopus stolonifer DSM-21941.6
Verticillium dahliae DSM-119383.1
Colletotrichum gloeosporioides DSM-621463.4
Botrytis cinerea DSM-51443.6
Aspergillus niger DSM-19574.7
a MIC, minimum inhibitory concentration (values in mg/mL).

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El-Kalamouni, C.; Venskutonis, P.R.; Zebib, B.; Merah, O.; Raynaud, C.; Talou, T. Antioxidant and Antimicrobial Activities of the Essential Oil of Achillea millefolium L. Grown in France. Medicines 2017, 4, 30.

AMA Style

El-Kalamouni C, Venskutonis PR, Zebib B, Merah O, Raynaud C, Talou T. Antioxidant and Antimicrobial Activities of the Essential Oil of Achillea millefolium L. Grown in France. Medicines. 2017; 4(2):30.

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El-Kalamouni, Chaker, Petras Rimantas Venskutonis, Bachar Zebib, Othmane Merah, Christine Raynaud, and Thierry Talou. 2017. "Antioxidant and Antimicrobial Activities of the Essential Oil of Achillea millefolium L. Grown in France" Medicines 4, no. 2: 30.

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