scholarly journals Population variability in Thymus glabrescens Willd. from Serbia: Morphology, anatomy and essential oil composition

2008 ◽  
Vol 60 (3) ◽  
pp. 475-483 ◽  
Author(s):  
Zora Dajic-Stevanovic ◽  
I. Sostaric ◽  
P.D. Marin ◽  
D. Stojanovic ◽  
M. Ristic
Keyword(s):  
Essential Oil ◽  
Morphological Traits ◽  
Leaf Surface ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Indigenous Populations ◽  
Oil Composition ◽  
Stem Anatomy ◽  
Essential Oil Yield ◽  
Leaf Morphological Traits

In five indigenous populations of Thymus glabrescens Willd. collected in the region of Banat (Serbia), the variability on leaf morphological traits, leaf and stem anatomy, and composition of the essential oil was studied. The major component in the studied populations was either thymol or ?-terpinene. Distinct differentiation of populations with respect to chemical composition of essential oils might be related to spatial distribution of the studied populations. No correlations between morphology, anatomy, and essential oil yield and composition were determined. Both capitate and peltate glandular trichomes were found on calyces, whereas the latter were noticed on the abaxial and adaxial leaf surface.

COMPARATIVE STUDY OF LEAF ANATOMY AND ESSENTIAL OILS OF THE HYBRID MENTHA X VILLOSO-NERVATA AND ITS PARENTAL SPECIES M. LONGIFOLIA AND M. SPICATA

1998 ◽  
Vol 46 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Nikos Gavalas ◽  
Artemios Bosabalidis M. ◽  
Stella Kokkini
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Leaf Surface ◽  
Parental Species ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Lower Leaf Surface ◽  
Palisade And Spongy Parenchyma ◽  
Derivatives Of

Leaves of the hybrid Mentha x villoso-nervata are covered with nonglandular trichomes of intermediate length between those of its parental taxa M. longifolia and M. spicata. Glandular trichomes producing essential oils are more numerous on the lower leaf surface than on the upper one in all three mints. Their number per mm2 is higher in M. spicata and it decreases in M. longifolia and M. x villoso-nervata. Stomata are also more numerous on the lower leaf surface of the three taxa, with M. longifolia predominating. The leaf lamina of M. x villoso-nervata is ca. 83% thicker than that of M. longifolia and ca. 9% thicker than that of M. spicata. The number of chloroplasts per mm2 of mesophyll section (leaf cross section) is higher in M. X villoso-nervata. In leaf paradermal sections, the sizes of the epidermal, palisade, and spongy parenchyma cells of M. X villoso-nervata have intermediate values between those of its parental species M. longifolia and M. spicata. M. x villoso-nervata leaves are the lowest in essential oil content. As concerns the essential oil composition, the hybrid resembles one parent, M. longifolia, in the derivatives of piperitenone and piperitone, and the other parent, M. spicata, in the high amount of limonene. It differs, however, from its parental species in that it contains a higher amount of germacrene D.

scholarly journals Essential Oil Composition of Helichrysum conglobatum from Cyprus

2016 ◽  
Vol 11 (10) ◽  
pp. 1934578X1601101
Author(s):  
Kaan Polatoğlua ◽  
Betül Demirci ◽  
İhsan Çalιş ◽  
Kemal Hüsnü Can Başer
Keyword(s):  
Essential Oil ◽  
Essential Oil Composition ◽  
Oil Yield ◽  
Hexadecanoic Acid ◽  
Oil Composition ◽  
Tetradecanoic Acid ◽  
First Report ◽  
Aerial Parts ◽  
Main Components ◽  
Essential Oil Yield

The essential oil of aerial parts of Helichrysum conglobatum (Viv.) Steudel. (Asteraceae) from Cyprus was analyzed by GC and GC-MS. The essential oil yield was 0.01, v/w. Forty five compounds were identified in the oil comprising 96.1% of the total. The essential oil was mainly composed of sesquiterpene type compounds and oxygenated sesquiterpene derivatives. The main components of the oil were β-caryophyllene (14.6%), γ-curcumene (14.1%), hexadecanoic acid (13.5%), tetradecanoic acid (7.5%), rosifoliol (5.4%) and δ-cadinene (5.3%). This is the first report on the essential oil composition of H. conglobatum from Cyprus.

Antimicrobial Activity, Essential Oil Composition and Micromorphology of Trichomes of Satureja laxiflora C. Koch from Iran

2004 ◽  
Vol 59 (11-12) ◽  
pp. 777-781 ◽  
Author(s):  
Ali Sonboli ◽  
Alireza Fakhari ◽  
Mohammad Reza Kanani ◽  
Morteza Yousefzadi
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Glandular Trichomes ◽  
Antimicrobial Property ◽  
Reproductive Organs ◽  
Essential Oil Composition ◽  
Geranyl Acetate ◽  
Native Plant ◽  
Oil Composition ◽  
Total Oil

The antimicrobial activity, essential oil composition and micromorphology of trichomes of Satureja laxiflora C. Koch, a native plant from Iran, were studied. The essential oil was obtained from the aerial parts at the flowering stage by hydrodistillation, and analyzed by GC and GC/MS. Thirty-three compounds representing 99.1% of the total oil were characterized. The major compounds were thymol (63.9%) and γ-terpinene (11.9%) followed by carvacrol (4.8%), p-cymene (3.9%), geraniol (3.2%) and geranyl acetate (3.1%). Furthermore, the essential oil and its three main components were tested against two bacteria and three fungi. The result of the bioassays has been shown that the oil possesses potent antimicrobial property. Chemical studies confirmed that a major portion of this antimicrobial activity is due to thymol present in the oil. Micromorphological analysis by SEM of both vegetative and reproductive organs revealed the presence of abundant sessile capitate and sparse short-stalked glandular trichomes along with retrorse eglandular hairs, giving useful diagnostic characters for identification of this medicinal plant.

Glandular trichomes, histochemical localization of secretion, and essential oil composition inPlectranthus grandidentatusgrowing in Portugal

2013 ◽  
Vol 28 (6) ◽  
pp. 393-401 ◽  
Author(s):  
Luísa Mota ◽  
Ana Cristina Figueiredo ◽  
Luis G. Pedro ◽  
José G. Barroso ◽  
Lia Ascensão
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Histochemical Localization ◽  
Oil Composition

scholarly journals INFLUENCE OF HARVESTING TIME ON CHEMICAL COMPOSITION OF THE ESSENTIAL OIL OF ABIES KOREANA TWIGS

2016 ◽  
Vol 8 (12) ◽  
pp. 205
Author(s):  
Min Seo ◽  
Kandhasamy Sowndhararajan ◽  
Songmun Kim
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Steam Distillation ◽  
Essential Oil Composition ◽  
Gas Chromatography Mass Spectrometry ◽  
Bornyl Acetate ◽  
Oil Composition ◽  
Harvesting Time ◽  
Abies Koreana ◽  
Essential Oil Yield

<p><strong>Objective: </strong>In the present study, the influence of harvesting time (April, June, August and October 2015) on the essential oil composition of <em>Abies koreana</em> twigs from Korea was investigated.</p><p><strong>Methods: </strong>The essential oil from the twigs of <em>A. koreana</em> was isolated by steam distillation and its chemical composition was determined by gas chromatography-mass spectrometry (GC-MS).</p><p><strong>Results: </strong>The essential oil yield was found to vary from 0.76 to 1.20% depending on the month of harvesting. The GC-MS analysis revealed the identification of 26 different essential oil components from the twigs harvested in the months of April, June, August and October, which were mostly monoterpene hydrocarbons (57.63–72.38%) followed by oxygenated monoterpenes (18.82–25.96%).<strong> </strong>Harvesting time mainly influenced on the concentration of the major components of the essential oil from the twigs of <em>A. koreana</em>. Limonene (17.38–31.13%), bornyl acetate (13.22–21.17%), camphene (12.56–13.26%), α-pinene (11.05–13.02%), β-pinene (4.55–5.70%), 3-carene (5.21–6.43%) and β-eudesmol (1.49–8.24%) were detected as the major components in the essential oil.</p><p><strong>Conclusion: </strong>The main differences between the essential oil compositions of four different months can be referred to limonene and bornyl acetate. The results showed considerable variations in the composition of essential oil, particularly quantitative variation during different harvesting months.</p>

scholarly journals Essential Oil Composition and Yield of Anise from Different Distillation Times

HortScience ◽  
2013 ◽  
Vol 48 (11) ◽  
pp. 1393-1396 ◽  
Author(s):  
Valtcho D. Zheljazkov ◽  
Tess Astatkie ◽  
Barry O'Brocki ◽  
Ekaterina Jeliazkova
Keyword(s):  
Essential Oil ◽  
Steam Distillation ◽  
Essential Oil Composition ◽  
Oil Yield ◽  
Optimal Time ◽  
Oil Composition ◽  
History Of ◽  
History Of Use ◽  
Total Oil ◽  
Essential Oil Yield

Anise (Pimpinella anisum L.) is a spice, an essential oil crop, and a medicinal plant with a long history of use. Anise seed oil is extracted from anise seed through steam distillation. There is no experimentally established optimal time for distillation of anise seed. We hypothesized that the distillation time (DT) can be customized for optimum yield and composition of anise essential oil. In this study, we determined the effect of nine steam DTs (5, 15, 30, 60, 120, 180, 240, 360, and 480 minutes) on essential oil yield and essential oil composition of anise seed. We developed regression models to predict essential oil yield, the concentration of individual constituents, and the yield of these constituents as a function of DT. Highest essential oil yield (2.0 g/100 g seed, 2%) was obtained at 360-minute DT. The concentration of transanethole, the major anise oil constituent, varied from 93.5% to 96.2% (as a percent of the total oil) and generally was high at 15- to 60-minute DT and low at 240- to 480-minute DT. However, the yield of transanethole (calculated from the essential oil yield and the concentration of transanethole in the oil) increased with increasing DT to reach maximum at 360-minute DT. The concentration of the other oil constituents varied significantly depending on the DT, and some of them were higher at the shorter DT than at the longer DT. However, the yields of these constituents were highest at longer DT (either 360 or 480 minutes). DT can be used to obtain anise essential oil with different composition that would benefit the essential oil industry. This study demonstrated the need for providing DT in reports where anise seed essential oil yield and composition are discussed. This article can also be used as a reference point for comparing studies in which different DTs were used to extract essential oil from anise seed.

scholarly journals Essential oil composition of indigenous populations of Hypericum perforatum L. from southern Albania

2015 ◽  
Vol 34 (2) ◽  
pp. 333 ◽  
Author(s):  
Nikoll Bardhi ◽  
Gjoše Stefkov ◽  
Marija Karapandzova ◽  
Ivana Cvetkovikj ◽  
Svetlana Kulevanova
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Principal Components ◽  
Hypericum Perforatum ◽  
Genetic Material ◽  
Essential Oil Composition ◽  
Indigenous Populations ◽  
Caryophyllene Oxide ◽  
Oil Composition ◽  
Different Populations

<p>The aim of this study was to investigate the yield and chemical composition of the essential oil (EO) isolated from over-ground parts of different populations of <em>Hypericum perforatum </em>L. (Hypericaceae) (HP) from southern Albania. The EO yield of 11 specimens of indigenous populations of HP ranged from 2.50 ml/kg to 11.00 ml/kg. GC/FID/MS analyses of the EOs revealed a total of 126 identified compounds representing 77.35–88.29% of the oils. Based on the prevalence of principal components, two types of EO were distinguished: pinene-type, which included seven populations with EO rich in α-pinene, and caryophyllene-type, which included four populations with EO rich in<em> trans</em>-(<em>E</em>)-caryophyllene and caryophyllene oxide. The information obtained can help to assess the potential of the studied Albanian populations for further sustainable wild exploitation to take it into a consideration as a resource of valuable genetic material or for further cultivation and breeding.</p><p>aim of this study was to investigate the yield and the chemical composition of the essential oil (EO) isolated from over ground parts of different populations of <em>Hypericum perforatum </em>L. (Hypericaceae) (HP) from southern Albania. The EO yield of 11 specimens of indigenous populations of HP ranged from 2.50 ml/kg to 11.00 ml/kg. GC/FID/MS analyses of the EOs reviled a total of 126 identified compounds representing 77.35-88.29 % of the oils. Based on prevalence of the principal components two types of EO were distinguished:  pinene type that include 8 populations with EO reach in α-pinene and caryophyllene type that include 3 populations with EO rich in<em> trans</em>-(<em>E</em>)-caryophyllene and caryophyllene oxide. Obtained information can help to assess the potential of studied Albanian populations for further sustainable wild exploitation as well as can be taken into a consideration as a resource of valuable genetic material for further cultivation and breeding.</p>

scholarly journals Rose-scented Geranium (Pelargonium spp.) Plant Growth, and Essential Oil Yield and Composition as Affected by Paclobutrazol Application

HortScience ◽  
2017 ◽  
Vol 52 (7) ◽  
pp. 991-995 ◽  
Author(s):  
Bahlebi K. Eiasu ◽  
Ntombekhaya Matafeni ◽  
Viwe Dyafta ◽  
Kenias Chigwaya
Keyword(s):  
Essential Oil ◽  
Block Design ◽  
Essential Oil Composition ◽  
Oil Yield ◽  
Oil Composition ◽  
Energy Consuming ◽  
University Of Fort Hare ◽  
The University ◽  
Time And Energy ◽  
Essential Oil Yield

Rose-scented geranium oil is extracted from the shoots (mostly the leaves) of the Pelargonium spp. through steam- or hydro-distillation. To extract less than 0.2% oil, farmers must transport and distil bulky herbage. This makes geranium oil production costly, and high time- and energy-consuming process. To investigate the effect of different paclobutrazol (PBZ) concentrations (0, 100, 200, 300 mg/L of water) on vegetative growth, and oil yield and composition of rose-scented geranium, three pot experiments were conducted. The experiments were conducted in a glasshouse of the University of Fort Hare, Alice, South Africa (located at 25°45′S and 28°16′E, an altitude of 520 m above sea level), between Oct. 2011 and May 2013. The treatments were arranged in a randomized complete block design (RCBD) in four replications. The PBZ was sprayed on the plants at 1 month of regrowth stage. Chlorophyll content increased with concentration of PBZ. The reduction of plant height in all PBZ-treated plants was significant, ranged between 18% and 33%. Plant canopy also reduced by 5% to 23%, and the differences were more noticeable in the plants grown between January and May (summer/autumn season), producing compact plants. Leaf area and internode length reduced as PBZ concentration increased. Paclobutrazol had no significant effect on leaf number, and essential oil yield and composition. This implies that, through applying PBZ, compacted (less bulky) rose-scented geranium could be produced without significant change in essential oil yield per plant and essential oil composition.

Plectranthus madagascariensis: Morphology of the Glandular Trichomes, Essential Oil Composition, and Its Biological Activity

1998 ◽  
Vol 159 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Lia Ascensão ◽  
A. Cristina Figueiredo ◽  
José G. Barroso ◽  
Luis G. Pedro ◽  
Jan Schripsema ◽  
...  
Keyword(s):  
Biological Activity ◽  
Essential Oil ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Oil Composition
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