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Article

Yield and Composition of the Essential Oil of the Opopanax Genus in Turkey

by
Ebru Yüce Babacan
1,
Azize Demirpolat
2,
Uğur Çakılcıoğlu
1,* and
Eyüp Bagcı
3
1
Department of Botany, Pertek Sakine Genç Vocational School, Munzur University, 62000 Tunceli, Turkey
2
Vocational School of Food Agriculture and Livestock, Bingöl University, 12000 Bingöl, Turkey
3
Department of Biology, Faculty of Sciences, Fırat University, 23119 Elazığ, Turkey
*
Author to whom correspondence should be addressed.
Molecules 2023, 28(7), 3055; https://doi.org/10.3390/molecules28073055
Submission received: 25 February 2023 / Revised: 27 March 2023 / Accepted: 27 March 2023 / Published: 29 March 2023
(This article belongs to the Special Issue Extraction, Separation and Identification of Compounds from Natural Sources)
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Abstract

:
The genus Opopanax W. Koch (Apiaceae) is represented by four species in Turkey. The composition of the essential oil of Opopanax genus members (Apiaceae) growing in Turkey was investigated in this study. GC-MS was used to analyze the composition of Opopanax essential oil samples that were taken from their natural environments. The Clevenger apparatus was used to hydrodistill the plant’s aerial parts, and the yields were determined to be between 0.2% v/w (for O. siifolius) and 0.4% (for O. hispidus, O. chironium, and O. persicus). The results and the chemical data provided some information and clues on the chemotaxonomy of the genus Opopanax. In this study, γ-elemene, butanoic acid octyl ester, and cylopropane were the main compounds identified in the essential oils of O. chironium, O. hispidus, and O. persicus. In particular, hexynyl n-valerate was most abundant in the essential oil of O. chironium, cyclopropane in that of O. hispidus, γ-elemene in that of O. persicus, and n-hexadecanoic acid/palmitic acid in that of O. siifolius. In a chemotaxonomic approach, the essential oil analysis of the Opopanax species revealed that these species conformed in a cluster analysis with their morphological classification. The constituents of the essential oils of all examined in the genus Opopanax were determined in this study, which is the most thorough one to date. This study provides new information about the composition of the essential oils of the investigated species.

1. Introduction

Apiaceae family members are significant plants that have economic importance all over the world. They are used as a vegetable food and as animal feed. Some Apiaceae species are also used as ornamental plants in parks and gardens. Because of the alkaloids and resins they contain, these plants are widely used in the medicine and cosmetics industries as well [1].
Opopanax is a genus within the Apiaceae family that is represented in Flora Iranica by O. persicus Boiss & Held and O. hispidus Griseb. The only species in Siberian flora is O. armeniacum Bordz., whereas Flora Europaea includes O. hispidus and O. chironium W.D.J. Koch [2,3]. The three species identified in Turkey are members of the genus Opopanax, which is spread in the Mediterranean region, Western Asia, and southern Europe. The uncommon monotypic Turkish genus Crenosciadium was recently classified as a synonym for Opopanax. The genus Opopanax is also represented by three species in Turkey [4]. As a result of recent studies, Crenosciadium Boiss. & Heldr. is a genus that has been combined with Opopanax and is represented by four species [5,6]. Bentham & Hooker [7] showed that Crenosciadium is closely related to Opopanax, while Menemen reported that C. siifolium (Boiss et. Heldr) [5] Menemen is a synonym for Opopanax siifolius (Boiss. & Heldr.); however, it differs from Opopanax in that it has a dorsal flat fruit. Özcan et al. studied the molecular characterizations of the nrDNA ITS, cpDNA matK, and trnL-F regions of C. siifolium and Opopanax species and determined that these two genera, although very similar, are different from each other [8]. The mericarp morphology is particularly helpful for separating the genera Opopanax and Crenosciadium, and the mericarp ribs are very significant for separating the two genera [9].
Members of the Opopanax genus have been used as medicine since antiquity and have also been consumed as a perfume for a long period in the past, for thousands of years. Humans may consume it in a variety of ways, such as by combining it with warm water or consuming it as resin [10]. Opopanax hispidus has a wider geographical distribution than other Opopanax members. This species is distributed from Western Europe to the Balkans and western parts of Asia. The stem and leaves of O. hispidus are used as antiseptics in Iranian ethnobotany, while the stem is used to treat infertility in Turkish folk medicine [11]. The root and aerial parts of O. chironium were extensively studied and found to contain various phthalides and C-17 acetylenes. In addition, it has been reported that this species has high antimicrobial and antioxidant activity against Escherichia coli and Listeria monocytogenes because of the phenols and flavonoids it contains [12]. Previous bioactivity and phytochemical studies showed that the genus Opopanax generally produces phenolics, diterpenes, coumarins, phthalides and has diverse biological properties. These compounds provide it with some pharmacological properties such as antioxidant, antimicrobial, and anticancer activities [12,13].
Studies have been conducted on the phytochemistry, conventional use, and pharmacological properties of the Opopanax genus. Additionally, data and chemical indicators that the species of this genus could be used therapeutically have been published. The genus Opopanax primarily produces phenolics, coumarins, phthalides, and diterpenes and possesses a variety of biological and pharmacological characteristics, including antioxidant, anticancer, and antibacterial activities, according to previous phytochemical and bioactivity investigations [14,15].
In phytochemistry and taxonomic studies, applications based on chemotaxonomy, especially predictions to determine the phytochemical content of plants, have gained great importance in recent years. Investigating the phytochemical components of Opopanax species naturally grown in Turkey was the goal of this study. We also aimed to determine the chemotaxonomic relationships between inter and infrageneric means. The results provide important clues on the taxonomic position of the genus members.

2. Results

There were quantitative and qualitative variations in the essential oils of the Opopanax species. In the essential oil composition of the Opopanax genus naturally grown in Turkey forty-one, thirty-two, twenty-three, and thirty components were identified in the essential oils of O. chironium, O. hispidus, O. siifolius, and O. persicus, respectively (Table 1). The identified compounds accounted for 86.9%, 90.8%, 96.4%, and 88.3% of the essential oils of O. chironium, O. hispidus, O. siifolius, and O. persicus species, respectively. The essential oil yields varied between 0.2 and 0.4 mL per 100 g of plant sample.
Hexyl n-valerate was also found to be highly present in O. chironium essential oil (18.5%). The presence of myristicin (16.5%), γ-elemene (16.0%), and butanoic acide-octyl ester (12.0%) was also important. In the oil of O. hispidus, cylopropane was the major compound (24.0%), followed by γ-elemene (14.0%), butanoic acid-octyl ester (11.5%), 1,3-benzodioxole (10.5%), and caryophyllene oxide (5.4%).
The results of the essential oils from the aerial part of O. siifolius analysis indicated n-hexadecanoic acid/palmitic acid (33.3%), stearic acid/n-octadecanoic acid (17.2%), oleic acid/(Z)-9-octadecenoic acid (12.0%) as the major components. The analysis of the essential oil O. persicus indicated that γ-elemene (20.5%), cylopropane (17.6%), and butanoic acide-octyl ester (13.5%) were the major components.

3. Discussion

The composition of the essential oil of Opopanax species in Turkey was compared with those reported in other studies and described in terms of constituents content. The essential oil of hydrodistilled O. chironium aerial parts was reported to contain cembrene (14.6%), angelicin (coumarins) (4.5%), β-caryophyllene (3.2%), E-β-Ionone (3.7%), (E)-β-damascenone (3.7%), and (E)-geranyl-acetone (3.3%) as main compounds (59). The only diterpenes detected in the extracts of O. chironium and O. persicum were coumarins. These species are also endemic to Iran, Turkey, Iraq, and Transcaucasia [57,58,59]. The presence of coumarins, such as columbianadin, eucedanin, diterpene, and gaudichaudin, called peucelinenoxide acetate, was determined in the extract obtained from O. chironium [13,60,61]. In the oil of O. chironium (L.) Koch, E-farnesyl acetate (20.2%) was determined as a major component [62]. In our study, trans-β-farnesene was found at a minor level (0.3%).
In the essential oil from the fruits of O. hispidus, 79 compounds were identified, and geranyl acetate (17.9%), tyrosol (48.8%), incensole acetate (4.3%), and germacrene D (4.0%) were the main components [63]. The content of geranyl acetate was 1.0% and that of germacrene D was 0.5% on the essential oil, and they appeared as minor components in this study. The content of γ-elemene was determined to be 20.5% in our study, and thus, it was found to be a significant chemical. γ-elemene from O. hispidus has shown strong insecticidal activity against the agricultural pest Spodoptera litura and may be beneficial as an environmentally benign biopesticide [64]. O. hispidus, used for the treatment of sclerosis, can also be used as a biopesticide [65]. The other major component of the essential oil from the Opopanax genus determined in this study was cyclopropane, found in the essential oils of O. chironium, O. hispidus, O. persicus in quantities corresponding to 5.5, 24.0, and 17.6%, respectively.
The oils of O. hispidus, O. chironium, and O. persicus were found to contain butanoic acide-octyl ester (content of 11.5%, 12.0%, and 13.5%, respectively. A fatty acid found naturally in plants is butanoic acid octyl ester. It can be found as a fatty acid and a glycol ether. Candida glabrata, a fungus that can infect the skin, has been demonstrated to be resistant to butanoic acid octyl ester. Butanoic acid octyl ester has been used as a dietary supplement to increase the absorption of lipophilic nutrients, such as vitamins A, D, E, and K. There are no documented side effects or toxicity for this substance [66].
In this study, the lowest amount of n hexadecanoic acid (33.3%) was found in the essential oil of O. siifolius. Due to the harmful side effects of synthetic compounds used for chemical protection, the use of substances obtained from plant sources, showing antimicrobial activity, is increasing. Palmitic acid, also known as n-hexadecanoic acid, is a type of saturated fatty acid [67]. It is well known that several fatty acids have antibacterial and antifungal effects [68]. By directly interacting with T cells, fatty acids can influence the immunological responses [69]. By reducing the generation of inflammatory mediators, dietary conjugated linoleic acid has an anti-inflammatory impact [70].
The essential oil analysis performed here showed that all Opopanax species are rich in sesquiterpenes and low in monoterpenes. Especially, O. siifolius contains more common saturated and unsaturated fatty acids. The results demonstrated the occurrence of major compounds in the genus patterns, i.e., the hexynyl n-valerate chemotype in O. chironium, the cyclopropane chemotype in O. hispidus, the γ-element chemotype in O. persicus, the palmitic acid chemotype in O. siifolius, in the eastern Anatolian region of Turkey. The chemical analysis results of O. siifolius showed that this species may be a different group and could be transferred to a genus different from Crenosciadium. As in our previous studies, the chemical analysis results supported the morphological data [71,72].
As shown in Table 1, the essential oil analysis conducted for this study indicated some chemical differences and similarities among the members of the Opopanax genus. The result of the clustering analysis was based on 10 main components in the essential oils of the Opopanax spp. examined, (Figure 1) and revealed that the Opopanax species were chemically as well as morphologically similar. The cluster analysis showed that O. siifolius belongs to the outermost clade according to the main essential oil compounds. Considering the groupings, it was observed that O. chironium, O. hispidus, O. persicus species were connected to each other (big group), and it is said that, chemically, they are closely related species. However, O. siifolius was far from these three species and appeared as a single species. It was concluded that the results are compatible with the morphological appearance of the taxa. The dendrogram showed that O. chironium and O. hispidus are closely related species, and O. persicus is connected with this small cluster and has a high similarity. O. siifolius was found in a different single cluster that combines with this triple cluster at a high level. This chemical grouping of the Opopanax genus members confirmed that O. siifolium may belong to a different genus, as indicated by the morphological analysis [5] and the molecular characterization of the Opopanax and Crenasciadum genera.
The results and the chemical data provided some information and clues on the chemotaxonomy of the genus Opopanax. In this study, γ-elemene, butanoic acid-octyl ester, cylopropane were the main components determined in O. chironium, O. hispidus, O. persicus whereas palmitic acid was the dominant component in O. siifolius. Hexynyl n-valerate (O. chironium), cyclopropane (O. hispidus), γ-elemene (O. persicus), and palmitic acid (O. siifolius) were the most abundant components in the essential oils of the analyzed taxa. Myristicin was detected only in O. chironium, and spatulenol was detected only in O. hispidus. Hexyl n-valerate, γ-elemene, butanoic acid-octyl ester and cyclopropane were among the major components in O. chironium, O. hispidus, and O. persicus oils. On the other hand, the major compounds detected in O. siifolius were different from those identified in the other Opopanax species studied (palmitic, stearic, oleic, linoleic acids and ethillinoleolate) (Table 1).
Based on previously published investigations, multivariate analysis was applied [29]. Both principal component analysis (PCA) and cluster analysis (CA) were used to determine the chemicals in the various samples. Then, using the matrix correlation setup, PCA was carried out using Varimax rotation. PC1 (50.96%) and PC2 (16.76%) were the two primary components of the principal component analysis, respectively. PC1 and PC2 carried a combined load of 67.72%. To investigate the correlation between the variables, the Kaiser–Meyer–Olkin (KMO) approach was used. The KMO value was 0.728, which is a respectable value. For the data set, Barlett’s test of sphericity likewise demonstrated a statistically significant difference at alpha of 0.04. The link between the four Opopanax species and their essential oil concentration was highlighted using PCA analysis, which was carried out using two different groups (PC1 and PC2). Figure 1, Figure 2 and Figure 3 show the results.
A biplot graph was created in this work to establish the multivariate relationships of the chemicals in the essential oils of the four Opopanax species investigated (Figure 3). If the angle between the vectors was less than 90°, the content of that species was better than the average; if the angle was larger than 90°, the content of that species was lower than the average; if the angle was equal to 90°, the content was near the average. Figure 3 shows the values of all components in the examined species and if they properties were positively or negatively associated with one another. The statistical analyses verified the results.
Essential oils have a wide range of beneficial properties. In this work, we isolated the essential oil from species of the Opopanax genus. It is possible to say that it is useful to compare the composition of essential oils and to provide basic data for taxonomic and essential oil evaluations in studies on plant genera. The study of essential oils is important to obtain chemotaxonomical relationships and promote scientific agriculture and product diversity. It is thought that the information on these essential oils will be useful for many industries working with natural products, such as the medical, cosmetics, landscaping, flavor, and food industries.

4. Materials and Methods

4.1. Sample Collection

The location information for the plant samples’ natural habitats is provided in Table 2. The plants were taken from their natural environment during the peak flowering season, which is from June to August, and were air-dried in the shade. The aerial parts of the species were used in the analyses. The Fırat University Herbarium is where the plant specimens are kept (FUH).

4.2. Isolation of Essential Oils and GC-MS Analysis

The plants used in this research were air-dried. The oil from the plants was extracted using the hydrodistillation technique. Using the Clevenger equipment, 3 h of hydrodistillation were performed on 100 g of air-dried aerial plant material. The organic layer in the gathering vial was transferred to the GC/GC-MS FID equipment once the distillation process was accomplished.
GC-MS was used to examine the essential oils [71,72]. The instrument was an HP 6890 model. The mass range was between 40 and 330 m/z, and the ionization energy was 70 eV. Opopanax samples (1 µL) were loaded into a GC (HP 5890 Series) for the analysis. The samples were run on a multi-purpose HP-5 column, 30 m, 0.25 mm, 0.25 µm (catalog number 19091J-313 Agilent, Santa Clara, CA, USA) [73,74].
Helium was used as the carrier gas, with a steady column flow rate of 1 mL/min. The settings for the column oven temperature program were 40 °C and a hold time of 2 min with a temperature rise of 3 °C/min rate until 240 °C (hold time, 2 min.). The flow rate was set to 1 l, and a 3.5 min buffer hold time was applied to the hexane samples. The split mode was chosen (split ratio 1:10 or 1:100). The detector temperature was 250 °C.
The mass spectrometric settings were full scan mode, 20,000 amu/s scan speed, and 50 spectra per sample frequency. The temperature at the contact injector and ion source was 250 °C and 200 °C, respectively.
Alkanes were used as standards to compare the retention indices (RI). By comparing the retention times (RT), mass spectra, and RI of the essential oils to those described in the literature (NIST 20 and Wiley Libraries) and MS libraries (Wiley MS library, New York, NY, USA) [75], the chemical components of the essential oils were identified. Traditional library searches just compare spectra rather than taking the retention parameters into account. In this study, libraries were searched using a combination of storage indexes, which made the compound identification simpler and more accurate. The device’s retention index spectrum libraries were also utilized in this study. The same analytical procedure as that for an identical column provided in the library was applied for better results. Table 1 details the essential oil constituents that were identified.

4.3. Cluster Analysis and PCA (Principal Component Analysis)

Ten significant components (less than 1%) were chosen from the water-distilled essential oil components. For the four Opopanax species, these elements were submitted to cluster analysis using numerical taxonomic techniques. The UPGMA statistical approach and the IBM SPSS Statistics 21.0.0 software were both employed for this investigation. Dendrograms were used to show the findings of these analyses, and the results were assessed in terms of numerical chemotaxonomic connections. The relationships between the species are shown in the cluster analysis tree shown in Figure 1.
To determine the variability’s organizational structure and calculate the distances between groups, multivariate analysis was used. Complete data sets were used for these analyses. To determine the commonalities between each measured unit, the UPGMA (unweighted pair-group average linkage) clustering approach based on Pearson distances was applied (Figure 2). The chemical components of the four Opopanax species’ essential oils served as the dependent variable. The chemicals of various samples were assessed using cluster analysis (CA) and principal component analysis (PCA). The unstandardized statistics were assigned the same weight as that previously reported.
The promax rotation was then used to perform the PCA with the matrix correlation configuration. PCA was then performed in the XLSTAT 2022 software using the matrix type correlation configuration. The species’ proximity and distance from one another based on their essential oils’ content are discussed. “R” (Boston, MA, USA) was used to create biplot graphs (Figure 3).

Author Contributions

Conceptualization, E.Y.B. and A.D.; methodology, E.B.; software, A.D.; validation, E.B.; formal analysis, E.Y.B.; investigation, A.D.; resources, U.Ç.; data curation, E.B.; writing—original draft preparation, A.D.; writing—review and editing, A.D. and U.Ç.; supervision, A.D.; project administration, E.Y.B.; funding acquisition, E.Y.B. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Conflicts of Interest

The authors declare no conflict of interest.

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Molecules 28 03055 g001 550
Figure 1. Clustering analysis of the Opopanax genus according to oil volatile components.
Figure 1. Clustering analysis of the Opopanax genus according to oil volatile components.
Molecules 28 03055 g001
Molecules 28 03055 g002 550
Figure 2. The composition of the essential oils of Opoponax species was analyzed using principal component analysis (PCA).
Figure 2. The composition of the essential oils of Opoponax species was analyzed using principal component analysis (PCA).
Molecules 28 03055 g002
Molecules 28 03055 g003 550
Figure 3. Biplot (PCA) of the composition of the essential oils of the examined Opopanax species.
Figure 3. Biplot (PCA) of the composition of the essential oils of the examined Opopanax species.
Molecules 28 03055 g003
Table
Table 1. Components of the essential oils from species of the Opopanax genus.
Table 1. Components of the essential oils from species of the Opopanax genus.
No.ComponentsRIRI(lit)Identification
Method		% Concentration
O.
chironium		O.
hispidus		O.
siifolius		O.
persicus
1.Octanal10741023 [16]RI, MS0.7---
2.Isovaleric acid1076872 [17]RI, MS0.1---
3.ο-Cymene10901026 [18]RI, MS0.2-0.1-
4.β-Ocimene10991040 [19]RI, MS0.80.2-0.5
5.Cyclohexane11191027 [20]RI, MS0.3---
6.1-Octanol11271093 [21]RI, MS2.00.5-1.2
7.Butanoic acid11461140 [22]RI, MS0.20.2-0.4
8.n-Amyl-Isovalerate11531125 [23]RI, MS0.50.2-0.3
9.Propanoic acid11801511 [24]RI, MS0.1--1.4
10.Etenilcyclohexane1216825 [25]RI, MS0.13.0--
11.Decanal12201204 [26]RI, MS-0.2-0.1
12.Cyclopropane1224405 [27]RI, MS5.524.0-17.6
13.Hexyl-2-hetylbutanoat12401240 [28]RI, MS-0.5--
14.Hexyl n-Valerate12461247 [29]RI, MS18.50.5-9.5
15.Pentanoic acid12491720 [30]RI, MS1.0---
16.Cis-cyclodecane12581227 [27]RI, MS0.2---
17.Cyclobutane1270455 [31]RI, MS0.2---
18.Acetic acid, decyl ester13031394 [32]RI, MS0.1---
19.n-Octyl İso Butyrate13321372 [32]RI, MS0.50.3-0.6
20.Eugenol13391359 [26]RI, MS0.1---
21.Thujene13581033 [33]RI, MS1.51.5-1.7
22.Bicyclo [4.1.0] heptane1367796 [34]RI, MS1.32.3-2.0
23.Butanoic acid-octyl ester13701372 [35]RI, MS12.011.5-13.5
24.α-Bourbonene13791385 [36]RI, MS0.5---
25.1-Decene13841061 [37]RI, MS1.51.5-1.8
26.Geranyl acetate13871392 [38]RI, MS-1.0-0.2
27.β-Caryophyllene13911392 [22]RI, MS-0.8--
28.Geranyl formate14041400 [22]RI, MS--0.5-
29.trans-β-farnesene14141477 [39]RI, MS0.30.2-0.3
30.cis-α-Bbsabolene14171417 [22]RI, MS0.2---
31.Naphthalene14291429 [22]RI, MS-0.3--
32.Germacrene D14341432 [22]RI, MS0.70.5-0.8
33.β-Gurjunene14421475 [19]RI, MS0.2 -0.5
34.γ-Elemene 14471437 [22]RI, MS16.014.00.920.5
35.1,3-Benzodioxole14581531 [27]RI, MS0.510.50.95.7
36.β-Sesquiphellandrene14601526 [19]RI, MS-1.1--
37.Myristicin14631522 [40]RI, MS16.5---
38.Germacrene B14831482 [22]RI, MS1.20.7-1.2
39.Spatulenol14931495 [22]RI, MS-3.1--
40.Caryophyllene oxide14971497 [22]RI, MS0.51.50.41.8
41.Isospathulenol15251638 [41]RI, MS0.10.5-0.3
42.α-Cadinene15381511 [38]RI, MS1.51.7-1.5
43.Isoaromadendrene epoxide15481594 [41]RI, MS-0.31.00.1
44.σ-Damascone15541456 [42]RI, MS0.3---
45.Farnesol 16251742 [43]RI, MS -3.3-
46.2 -Pentadecanone16291448 [44]RI, MS0.12.51.50.5
47.1,2-Benzenedicarboxylic acid16371643 [45]RI, MS--0.5-
48.Pentacosane16521561 [44]RI, MS--0.9
49.n-Hexadecanoic acid/Palmitic acid16901970 [46]RI, MS0.52.733.31.8
50.Adamantane17121400 [47]RI, MS--1.2-
51.Benzeneacetaldehyde17411640 [48]RI, MS0.1---
52.Cembrene A17471955 [49]RI, MS--3.80.6
53.Methoxsalen17492020 [50]RI, MS0.1
54.2-Hexadecen-1-ol17911420 [51]RI, MS-2.11.5
55.Linoleic acid18052078 [43]RI, MS0.1 5.10.5
56.Oleic acid/(Z)-9-Octadecenoic acid18092141 [52]RI, MS--12.0-
57.Etillinoleolat1812-RI, MS--3.9-
58.3-Cyclohexane-1-methanol18211071 [53]RI, MS--1.7-
59.Stearic acid/n-Octadeca noic acid18262180 [41]RI, MS--17.21.0
60.Cyclooctanone1896-RI, MS--2.0-
61.Tricosane19001902 [54]RI, MS0.10.2--
62.Cis-Sesquicyclo-geraniol19041865 [55]RI, MS--1.9-
63.Trimethylene1918-RI, MS--1.6-
64.Eicosanoic acid19292365 [56]RI, MS--0.80.1
TOTAL 86.990.896.488.3
Table
Table 2. Collection date and locality information for the studied Opopanax species.
Table 2. Collection date and locality information for the studied Opopanax species.
1O. chironiumTekirdağ between Hayrabolu, 10 km from Tekirdağ, wet places along the river, 70 m., 13 June 2015, Paksoy * 2018 N 40.951741, E 27.468926
2O. hispidusMuğla, Turgutreis Aspat region, Aspat castle and around, within the scrubs, 100–150 m, 2 July 2015, Paksoy 2021 N 37.000135, E 27.267143
3O. persicusVan, Near the Hoşap, wet grassy places, 2000 m, 20 June 2016, Paksoy 2049 N 38.317180, E 43.802793
4O. siifoliusAntalya, Akçay, Around the Girdev lake, near the river, 2000 m, 3 August 2015, Paksoy 2024 N 36.664530, E 29.659819
* The samples were collected by Mehmet Yavuz Paksoy.
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Babacan, E.Y.; Demirpolat, A.; Çakılcıoğlu, U.; Bagcı, E. Yield and Composition of the Essential Oil of the Opopanax Genus in Turkey. Molecules 2023, 28, 3055. https://doi.org/10.3390/molecules28073055

AMA Style

Babacan EY, Demirpolat A, Çakılcıoğlu U, Bagcı E. Yield and Composition of the Essential Oil of the Opopanax Genus in Turkey. Molecules. 2023; 28(7):3055. https://doi.org/10.3390/molecules28073055

Chicago/Turabian Style

Babacan, Ebru Yüce, Azize Demirpolat, Uğur Çakılcıoğlu, and Eyüp Bagcı. 2023. "Yield and Composition of the Essential Oil of the Opopanax Genus in Turkey" Molecules 28, no. 7: 3055. https://doi.org/10.3390/molecules28073055

APA Style

Babacan, E. Y., Demirpolat, A., Çakılcıoğlu, U., & Bagcı, E. (2023). Yield and Composition of the Essential Oil of the Opopanax Genus in Turkey. Molecules, 28(7), 3055. https://doi.org/10.3390/molecules28073055

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