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

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.

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

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 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.

Essential Oil Composition and Glandular Trichomes ofMarrubium vulgareL. Growing Wild in Algeria

2006 ◽  
Vol 18 (4) ◽  
pp. 369-373 ◽  
Author(s):  
Rachid Belhattab ◽  
Larbi Larous ◽  
A. Cristina Figueiredo ◽  
Pedro A.G. Santos ◽  
Monya M. Costa ◽  
...  
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Oil Composition

Glandular Trichomes and Essential Oil Composition of Endemic Sideritis italica (Mill.) Greuter et Burdet from Central Italy

2011 ◽  
Vol 8 (12) ◽  
pp. 2179-2194 ◽  
Author(s):  
Claudia Giuliani ◽  
Laura Maleci Bini ◽  
Fabrizio Papa ◽  
Gloria Cristalli ◽  
Gianni Sagratini ◽  
...  
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Central Italy ◽  
Essential Oil Composition ◽  
Oil Composition

scholarly journals Essential Oil Composition and Micromorphological Traits of Satureja montana L., S. subspicata Bartel ex Vis., and S. kitaibelii Wierzb. Ex Heuff. Plant Organs

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 511
Author(s):  
Tanja Dodoš ◽  
Smiljana Janković ◽  
Petar D. Marin ◽  
Nemanja Rajčević
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Relative Yield ◽  
Essential Oil Composition ◽  
Gas Chromatography Mass Spectrometry ◽  
Oil Composition ◽  
Plant Organs ◽  
Plant Parts ◽  
Capitate Trichomes ◽  
Peltate Trichomes

The essential oil (EO) composition of Satureja plants is highly variable. Recent studies suggest that there is an even difference in the EO composition from different plant organs within the same plant. This study aims to examine the chemical profile of EOs and the micromorphological characteristics of different organs of three Satureja species. The relationship between the number of glandular trichomes and EOs profile and relative yield is also investigated. Individuals from five populations were visualized using a scanning electron microscope, while EOs of leaves, calyces, corollas, and whole aerial parts were isolated using simultaneous distillation and extraction and analyzed using gas chromatography/mass spectrometry. Three types of glandular trichomes were detected. Peltate trichomes were present on all plant organs of studied species, while two types of capitate trichomes show different organ and species preferences. The EOs profiles differed across the plant parts, but showed a species specific composition. Univariate and multivariate statistics were used to show a correlation between the peltate trichomes and EO yield, and chemophenetic significance of EO profiles.

scholarly journals Sites of secretion of bioactive compounds in leaves of Dracocephalum moldavica L.: anatomical, histochemical, and essential oil study

2019 ◽  
Vol 42 (4) ◽  
pp. 701-715 ◽  
Author(s):  
Marta Dmitruk ◽  
Aneta Sulborska ◽  
Beata Żuraw ◽  
Ernest Stawiarz ◽  
Elżbieta Weryszko-Chmielewska
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Secondary Compounds ◽  
Essential Oil Composition ◽  
Raw Material ◽  
Leaf Epidermis ◽  
Oil Composition ◽  
Capitate Trichomes ◽  
Main Components ◽  
Light Fluorescence

Abstract Dracocephalum moldavica L. is an aromatic plant emitting intense lemon scent. The aboveground parts of the plants constitute raw material for medicine and food industry. In contrast to the comprehensively investigated trichomes, there are only few studies of the histochemical characteristics of the leaves of essential oil-bearing plants from the family Lamiaceae. The present study shows the micromorphology, anatomy, and histochemistry of the leaves of the analysed species. The research aimed to determine the location of essential oil and other specialised metabolites in leaf tissues. The investigations of fresh and fixed material were carried out with the use of light, fluorescence, and scanning electron microscopy. Additionally, the content and composition of essential oil in the leaves were determined with the GC/MS method. The leaf epidermis had non-glandular unbranched trichomes and three types of glandular trichomes: peltate as well as long and short capitate trichomes. The results of the histochemical assays showed positive reactions to lipids and to some secondary compounds such as essential oil, terpenes, phenolic compounds, and flavonoids in all types of the glandular and non-glandular trichomes. The same compounds were found in the epidermis cells of the leaves. The results of the present study indicate that the intense smell of the leaves is associated with emission of essential oil not only by the glandular and non-glandular trichomes but also by the leaf epidermis cells. The main components in the essential oil (0.10%) include geranial, neral, geraniol, nerol, and trans-myrtanol acetate. Since D. moldavica has been used as an adulterant of Melissa officinalis L., the anatomical traits of leaves and the essential oil composition in both species were compared in the study.

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