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The plants spices with therapeutic properties – summer savory (Satureja hortensis L.) and common thyme (Thymus vulgaris L.)

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  • Fructoplant

Abstract

Common thyme (Thymus vulgaris L.) and summer savory (Satureja hortensis L.) belong to the Lamiaceae family. High adaptability of these plants to environmental conditions has caused that they are grown in various regions of Europe, especially in temperate climates. Herbal drugs of these plant species are Thymi herba and Saturejae herba, and their essential oils hold the main biological activities. The predominant components of savory and thyme oils are thymol, carvacrol, p-cymene, and γ-terpinene, found in various amounts. The herbal drugs are also abundant in flavonoids, tannins, phenolic acids, triterpene and bitter compounds, saponins, sugars, vitamins and minerals. Extracts from fresh raw material and essential oil show antimicrobial, antioxidant activity, spasmolytic, cholagogic activity. Also, they stimulate gastric activity and secretion of digestive juices. They are significant spices often used in pharmacy, medicine, as well in the food and cosmetics industry.
The plants spices with therapeutic properties summer savory (Satureja hortensis L.) and common...
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ANNALES HORTICULTURAE
wcześniej – formerly
Annales UMCS sectio EEE Horticultura
VOL. XXVIII (4) 2018
CC BYNCND DOI: 10.24326/ah.2018.4.1
Department of Plant Cultivation and Nutrition
Faculty of Horticulture and Landscape Architecture, Leszczyńskiego 58, 20-068 Lublin,
University of Life Science in Lublin, Poland
e-mail: katarzyna.dzida@up.lublin.pl
DANIEL SKUBIJ, NATALIA SKUBIJ, KATARZYNA DZIDA
The plants spices with therapeutic properties summer savory
(Satureja hortensis L.) and common thyme (Thymus vulgaris L.)
Rośliny przyprawowe o właściwościach leczniczych – cząber letni (Satureja
hortensis L.) i tymianek zwyczajny (Thymus vulgaris L.)
Summary. Common thyme (Thymus vulgaris L.) and summer savory (Satureja hortensis L.)
belong to the Lamiaceae family. High adaptability of these plants to environmental conditions has
caused that they are grown in various regions of Europe, especially in temperate climates. Herbal
drugs of these plant species are Thymi herba and Saturejae herba, and their essential oils hold the
main biological activities. The predominant components of savory and thyme oils are thymol,
carvacrol, p-cymene, and γ-terpinene, found in various amounts. The herbal drugs are also
abundant in flavonoids, tannins, phenolic acids, triterpene and bitter compounds, saponins, sugars,
vitamins and minerals. Extracts from fresh raw material and essential oil show antimicrobial,
antioxidant activity, spasmolytic, cholagogic activity. Also, they stimulate gastric activity and
secretion of digestive juices. They are significant spices often used in pharmacy, medicine, as well
in the food and cosmetics industry.
Key words: essential oil, spices, health-promoting properties
INTRODUCTION
Herbology has been closely related to the existence of a man since ancient times.
The richness of the natural landscape has always provided plant medicines for various
ailments. Spicies have been used for thousands of years in peoples everyday lives, and
knowledge about them was recorded in numerous books [Lutomski 2000]. Currently,
there is an increasing trend of interest in herbal medicine throughout the world. It is asso-
ciated with occurrence, the so-called civilization diseases, decrease in natural immunity
D. SKUBIJ, N. SKUBIJ, K. DZIDA
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to infections and increased susceptibility to various types of allergies [Lutomski 2002].
This is also connected with development of the food industry, and more specifically, with
increase in the demand for vegetable flavor and aroma additives, as well as preservative
and pro-health ones, the rich source of which are herbal spice plants.
The main herbal plants, used not only as spices, but also as healing, aromatic and
cosmetic agents, include the summer savory (Satureja hortensis L.) and common thyme
(Thymus vulgaris L.). The name of savory comes from the word sáturo meaning satu-
rate or fill, while the name of thyme originates from the Greek word thyo meaning per-
fume, pleasant fragrance or thymos courage and endurance. Their Latin names refer
to the properties they have, among others improving the taste and digestibility of dishes
[Morales 2002]. The first mentions of these species appear in the literature of Ancient
Greece, where they were described by Hippocrates (V/IV century BC). In his work, the
Corpus Hippocraticum, thyme was described as a diuretic agent, and savory as a raw
material for expulsion (expectorant). Theophrastus, from Eresos (IV/III century BC),
showed the healing effect of essential oils of both species in the work On fragrances. The
mention of these plants can also be found in the works of Roman scholars: Dioskurydes
(first century CE) or Galenus (I/II century CE) [Balcerek and Modnicki 2007].
The aim of the work was to present the health-promoting properties of summer sa-
vory and common thyme as spice plants grown in Poland.
LITERATURE REVIEW
Systematics, origin, biology
Summer savory and common thyme are plants belonging to the family of Lamiaceae.
They come from the Mediterranean region, mainly the areas of Spain, southern France
and Italy and northern Africa, as well as areas of the Middle East [Morales 2002]. Their
high adaptability to environmental conditions has enabled thyme to adjustment totemper-
ate climates around the world, while savory is grown in the regions of central and west-
ern Europe, western and southern Asia and North America [Jafari et al. 2016].
Summer savory is an annual plant, belonging to the genus Satureja, which includes
over 130 species. The plant grows up to a height of 60 cm, has a densely branched stem
at the base of the wood-burning shoot, with a gray-green or violet color. Leaves of the
savory are even, the lanceolate shape, placed opposite or in whorls. There are densely
arranged oil glands on the leaves and flowers [Szempliński 2017]. The plant creates very
fine, double-lipped, white or pink flowers with red spots on the neck, that grow in the
angles of the upper leaves creating a one-sided apparent ear, built of pseudo-whorls.
Savory blooms very intensively from June to September. The fruit is schizocarp, disinte-
grating into four dark-brown, egg-shaped acini. The plant has a bunch-type root system
[Hadian et al. 2008].
Thyme belongs to the genus Thymus, which includes 300 species. It is an evergreen
shrub with a height of 2040 cm. Stems are straight or partially raised, branched, woody
at the bottom. The plant forms ovate, short-legged, gray-green leaves, that are hairy from
the bottom of a length up to 1.2 cm, alternatively arranged. Thyme blooms from May to
September. It has double-lipped, small, pink or purple flowers collected in bulbous inflo-
rescences on the tops of shoots [Zawiślak 2010]. Thyme flowers abundantly secret nectar
The plants spices with therapeutic properties summer savory (Satureja hortensis L.) and common...
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and are often visited by honey bees. The fruit of this species is a fourfold schizocarp,
containing light-brown acini [Thompson et al. 1998, Alizadeh et al. 2011].
Thyme plantations are usually established in a two- or three-year growing cycle,
however, in some regions during cold winters, plants can be frozen. Therefore, in
countries where winters are cold (Scandinavia, Eastern Europe, Canada), thyme is
grown on an annual basis [Letchamo et al. 1999, Glambosi et al. 2002, Carlen et al.
2010]. Two forms of thyme are distinguished in western and central Europe crops:
Thymus vulgaris L. f. capitatus Willk. et Lange, the so-called French, annual, not very
resistant to cold and Thymus vulgaris L. f. vercillatus Willk. et Lange, the so-called
German, perennial [Dzida 2013].
Chemical composition of the raw material and its diversification
Pharmacopeal raw material, the herbal drug, for common thyme and summer savory
is the aboveground part of the plant, Thymi herba and Saturejae herba [Szempliński
2017], which use to be harvested at the beginning of plant flowering, and then dried in
natural conditions or in a drying room at 35°C [Berbeć and Kołodziej 2007].
The main component of the raw material is essential oil (Thymi aetheroleum and
Saturejae aetheroleum) obtained during steam distillation of an aqueous suspension of
ground flowering herb [Michalski and Zielińska 2015]. Thyme oil (Thymi aetheroleum)
is a colorless, reddish or yellow, thin liquid with a characteristic herbal aroma. Usual-
ly, the content of oil in fresh thyme raw material does not exceed 1% of its mass
[Michalski and Zielińska 2015], and in its dried form it can be at the level from 0.32%
to 4.9% [Ozguven and Tansi 1998]. The essential oil of savory (Saturejae aetherole-
um) is a light yellow, orange or colorless liquid with an intense odor. The content of
essential oil in air-dry savory range from 0.8 to 3% [Hadin et al. 2008], and may reach
up to 6.5% [Baser et al. 2004].
Chemical composition of thyme and savory essential oils varied as a result of genet-
ic, ontogenetic [Christen and Grevsen 2006, Çirak et al. 2007, Lee and Ding 2016] and
environmental variation [Alizadeh et al. 2011, Mumivand et al. 2011, El-Gohary et al.
2015]. Comparing the chemical composition of thyme oil obtained from different re-
gions, Raal et al. [2005] found large variations within the discussed species. Thymol
content was the highest in oils obtained from thyme originating from the Netherlands
(65.5%) and Estonia (75.7%), while plants grown in Greece were dominant in carvacrol
(83.5%). The oil extracted from thyme cultivated in Armenia contained 17% thymol and
high contents of neral and citronelol (32.5%), while in plants from Scotland, France,
Moldova and Russia, thymol and p-cymene prevailed [Raal et al. 2005]. These data indi-
cate that the biosynthesis of the essential oil in thyme remains under the clear influence
of genetic factors related to the chemical breeds of the species within the inhabited terri-
tory, but is also affected by the environmental factors of a given region.
Common thyme shows high variability in chemical composition of the oil. Analyzing
the composition of Thymus vulgaris oil available in the literature [Dambrauskiene et al.
1999, Lis 2003, Marzec et al. 2010], several chemotypes of this species can be distin-
guished: 1. oil abundant in thymol thymol chemotype (from sub-groups thymol >
p-cymene > γ -terpinene; p-cymene > thymol > γ-terpinene and p-cymene > γ-terpinene
> thymol), 2. oil abundant in carvacrol carvacrol chemotype, collected mainly from
France, Italy and Canada, 3. oil abundant in carvacrol/thymol carvacrol/thymol chemo-
D. SKUBIJ, N. SKUBIJ, K. DZIDA
10
type (from the sub-groups carvacrol > thymol and thymol > carvacrol), 4. oil abundant in
linalool linalool chemotype, found in Egypt, 5. oil abundant in geraniol geraniol
chemotype, 6. oil abundant in γ-terpineol γ-terpineol chemotype 7. oil abundant in
hydrated trans-sabinen/terpinene-4-ol trans-sabinen/terpinene-4-ol chemotype, from
France.
Therefore, there are several chemotypes of thyme, but the thymol type, the oil of
which contains remarkable quantity of thymol (2083%), is the most valuable. Other
important components are carvacrol (0.56%), p-cymene (9–43%), α-pinene (0,53%),
linalool (021%), borneol (05%), 1,8-cyneole (02.5%), geraniol (06%), as well as
β-caryophyllene (0.63.6%), limonene (2.082.3%), γ-terpinene (0.48.3%), terpinene-
4-ol (0.211.0%) and hydrated trans-sabinene (018.2%) [Mewes et al. 2008, Jabbari
et al. 2011, Vakili and Sharafzadeh 2014, Kozera et al. 2015].
Thyme herb is also abundant in other active substances, such as flavonoids, tannins,
phenolic acids, triterpene compounds, bitterness, saponins, sugars, vitamins and minerals
[Lis 2003, Zawiślak 2010].
The main biologically active substance of the summer savory raw material is the es-
sential oil, which could be of quite variable chemical composition. The major and most
commonly found in components of the oil are carvacrol (0.4–70.5%), γ-terpinene
(023%), p-cymene (010%) and thymol (027%) while the minor ones are α-terpinene,
β-myrcene, α-thujene, α-pinene [Góra et al. 1996, Mumivand et al. 2011, Dzida 2013].
However, with reference to the chemical composition of summer savory oil, the lit-
erature presents three existing chemotypes found in different parts of the world. The first
one is dominated by carvacrol and γ-terpinene, and occurs in Poland, Italy, Spain, Tur-
key, Iran, Scotland and Mongolia. In contrast, in Russia and the Crimea, prevail compo-
nents such as p-cymene and carvacrol, representing the second chemotype, while in Tur-
key there is a third chemotype with dominating components, thymol and γ-terpinene
[Baser et al. 2004, Mihajilov-Krstev et al. 2009].
In addition to the essential oil, flavonoids, tannins, ursolic acid, carotenoids, mucous
substances, mineral salts and vitamin C are also present in the savory herbal material
[Szempliński 2017].
Pharmacological activity and culinary use of herbs
The active components of thyme and savory herbal drug act to the digestive system,
stimulate the secretion of gastric juice, increase appetite, accelerate the digestion and
absorption of nutrients.
Essential oil and extracts from the herb Satureja hortensis L. and Thymus vulgaris L.
show a multidirectional effect on the human body. They have antibacterial properties,
both against Gram-positive and Gram-negative bacteria and antifungal properties [Omid-
beygi et al. 2007, Mihajilov-Krstev et al. 2009, Mihajilov-Krstev et al. 2010]. In medi-
cine, the thyme is often used as an expectorant; it stimulates the secretion of mucus and
the movement of cilia of the upper respiratory tract, also helps to thin the residual secre-
tion and makes it easier to expectorate. In addition, it relieves bouts of cough [Lis 2003].
Inhalations with thyme oil are used in the treatment of persistent respiratory infections.
Common thyme and summer savory also have a spasmolytic effect [Hajhasemi et al.
2000]. Their bitter compounds stimulate the secretion of gastric juice, accelerate diges-
tion and facilitate the absorption of food. Thymi aetheroleum and Saturejae aetheroleum
The plants spices with therapeutic properties summer savory (Satureja hortensis L.) and common...
11
are indicated as protective agents against bacteria that cause gastrointestinal disease
[Kotan et al. 2012, Hajhasheni et el. 2012]. In addition, thyme and savory also show
carminative, choleretic, sedative and diuretic effects [McGimpsey at el. 1994,
Kluczyńska 2001]. The studies also showed a beneficial effect of thyme oil on wound
healing after burns [Al-Saimary et al. 2007].
Due to its bactericidal action, thyme oil is used as a component of toothpastes, mouth
and throat fluids, after-shave cosmetics, disinfectant creams and lotions, and as an ingre-
dient in bath additives and face masks [Kluczyńska 2001]. Research indicates the possi-
bility of using Thymus vulgaris L. oils, containing thymol and carvacrol, as ingredients of
antiseptic preparations used in the oral cavity. Thyme and summer savory oil proved
to be an effective antibacterial agent in relation to the Enterococcus faecalis resistant to
vancomycin, which indicates the possibility of its use in natural therapy of infectious
diseases [Karami-Osboo et al. 2010, Michalski and Zielińska 2015].
Thyme is one of the oldest herbs in the world, and its importance in culinary art is as
important as in medicine. It is one of the most commonly used spice plants, and its aro-
matic fresh or dried herb is used as an addition to many dishes. Especially the Italian,
French and Spanish cuisines owe their specific character to the smell of thyme
[Kluczyńska 2001]. Summer savory also has an important role in food processing and in
the household as an aromatic spice due to the spicy-aromatic smell and strong peppery
flavor [Bielowski 2008]. This specie is an invaluable addition to heavily digestible dishes
and dishes from legumes, such as: beans, peas, lentils or soy. In the culinary history of
Poland, summer savory has become a permanent ingredient of venison dishes, thick
sauces, stuffing or dishes with mushrooms and fatty meats. The fresh savory is also one
of the ingredients of Bulgarian Czubrica seasoning mix, as well as one of the ingredi-
ents of herbal pepper and Provencal spice [Balcerek and Modnicki 2007].
The herb of savory and thyme, due to its preservative and antioxidant properties, is
also used for preserving the food and production of herbal wines and liqueurs [Alinkina
et al. 2013, Hosseini et al. 2013].
Furthermore, studies on the impact of herbal supplements properties on animal nutri-
tion have indicated that the addition of powdered savory herb to the diet for chickens
increases the overall weight of carcasses and stimulates the production of immune bod-
ies. Therefore, introducing summer savory into the chicken diet may be an alternative to
antibiotics used in broiler feeding [Balcerek and Modnicki 2007].
CONCLUSIONS
Common thyme and summer savory are very valuable medicinal and aromatic plants,
and their activity is mainly related to the presence of essential oil and its phenolic com-
pounds thymol and carvacrol. Due to its high antibacterial and antioxidant activity,
their essential oil, can be used for medical and cosmetic purposes as well as a food pre-
servative. The chemical composition of thyme and savory oil, especially the content of
major components, change under the influence of genetic, ontogenetic and environmental
factors. In medicine, the extracts from raw herbal material of thyme, the essential oil,
is used in aromatherapy, for massage, or in baths Thyme and savory are used as expecto-
rant, spasmolytic, and cholagogic agents. In addition, they stimulate stomach functioning
D. SKUBIJ, N. SKUBIJ, K. DZIDA
12
and secretion of digestive juices. Preparations from the discussed species are popular
natural medicines, which are effective and safe, and their use has a long tradition.
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Acknowledgments: The research was supported by the Ministry of Science and Higher Education
of Poland in part of the statutory activities of University of Life Sciences in Lublin.
Streszczenie. Tymianek pospolity (Thymus vulgaris L.) i cząber ogrodowy (Satureja hortensis L.)
należą do rodziny jasnotowatych (Lamiaceae). Duże zdolności adaptacyjne tych roślin do
warunków środowiskowych sprawiły, iż uprawiane są w różnych regionach Europy, zwłaszcza na
terenach o klimacie umiarkowanym. Surowcem zielarskim jest ziele (Thymi herba i Saturejae
herba), a główną substancją biologicznie aktywną olejek eteryczny. Składnikami dominującymi
olejku cząbrowego i tymiankowego są: tymol, karwakrol, p-cymen, γ-terpinen występujące
w różnych ilościach. Ziele omawianych gatunków jest zasobne także we flawonoidy, garbniki,
kwasy fenolowe, związki triterpenowe i goryczowe, saponiny, cukry, witaminy i związki
mineralne. Ekstrakty z surowca oraz olejek eteryczny cząbru i tymianku wykazują aktywność
przeciwdrobnoustrojową, antyoksydacyjną, ponadto działają spazmolitycznie, żółciopędnie
i żółciotwórczo oraz pobudzająco na czynności żołądka i wydzielanie soków trawiennych.
znaczącymi przyprawami często wykorzystywanymi w farmacji, medycynie, a także przemyśle
spożywczym oraz kosmetycznym.
Słowa kluczowe: olejek eteryczny, przyprawy, właściwości prozdrowotne
Otrzymano/ Received: 9.10.2018
Zaakceptowano/ Accepted: 8.11.2018
... The oil yields of S. hortensis from Serbia was 2.05% (v/w) 11 . The main components of the oil are carvacrol (0.4-70.5%), γ-terpinene (0-23%), p-cymene (0-10%) and thymol (0-27%) while the minor components are α-terpinene, β-myrcene, α-thujene and α-pinene 15,16 . ...
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