Chemical composition and histochemistry of Sphagneticola trilobata essential oil

Abstract

Anatomical and histochemical investigations of Sphagneticola trilobata (L.) Pruski, Asteraceae, secretory structures in leaves and stems and the seasonal variation of essential oils were carried out. Histochemical techniques enabled the specifi c location of the essential oil accumulation in the internal (canals) and external structures (trichomes). Histochemical analysis showed that the secretory trichomes produced steroids. The highest yield was obtained from plants collected in winter, when it was registered low temperature and precipitation. The essential oil was characterized by high percentage of hydrocarbon sesquiterpenes, hydrocarbon monoterpenes and low levels of oxygenated sesquiterpenes. The major components were germacrene D (11.9-35.8%), α-phellandrene (1.4-28.5%), α-pinene (7.3-23.8%), E-caryophyllene (4.6-19.0%), bicyclogermacrene (6.0-17.0%), limonene (1.8-15.1%) and α-humulene (4.0-11.6%). The percentage of most of the individual constituents present in S. trilobata essential oil changed signifi cantly during the months.

Chemical Variability and Biological Activities of Eucalyptus spp. Essential Oils

“…Such essential oils (EOs) can be produced from all parts of plants (buds, gums, blossoms, flowers, leaves, stems, twigs, seeds, fruits, roots, wood or bark), depending upon the producing species. EOs are stored in several secretory structures such as epidermic cells, secretory hairs, secretory ducts, secretory cavities, glandular trichomes, or resin adducts [15,16,17,18,19]. EOs are generally hydrophobic liquids and soluble in alcohol, nonpolar or weakly polar solvents, waxes, and oils.…”

Phytochemical screening and antimicrobial activity testing of crude hydroalcoholic extract from leaves of Sphagneticola trilobata (Asteraceae)

“…Although, phytochemical analysis studies of S. trilobata have been conducted (CECHINEL FILHO, 2000;CARVALHO et al, 2001;FIDELIS et al, 2005;SILVA et al, 2012;SHANKAR & TOMAS, 2014), it is important to identify the chemical composition of extracts from this plant collected from different regions of Brazil because the composition may vary with changes in soil and climate. Thus, the antimicrobial activity of the extract from this plant against bacteria isolated from human and animal skin is directly related to the variation in its chemical components under different environmental conditions.…”

“…Other studies have analyzed the chemical composition of the aerial parts of S. trilobata and identified the main chemical constituents of this species, such as kaurenoic acid, luteolin, flavonoids, tannins, and essential oils (CECHINEL FILHO, 2000;FIDELIS et al, 2005;SILVA et al, 2012). In addition to these, other compounds have been isolated from the flowers, such as stigmasterol and its glucosides, β-sitosterol, oleanolic acid ester derivatives (CARVALHO et al, 2001), phenolic compounds, flavonoids, and terpenoids (SHANKAR & TOMAS, 2014).…”

Chemical&nbsp;Variability and&nbsp;Biological Activities of&nbsp;<em>Eucalyptus</em> spp. Essential Oils

“…By using the contact cytotoxicity assay on filter paper, oils from E. globulus and E. viminalis caused 100% mortality at concentrations of 0. 16 2 ). The analysis of essential oil content and mortality activity resulted in a correlation between 1,8-cineole content and LC50.…”

“…Such oils can be produced by all parts of plants (buds, gums, blossoms, flowers, leaves, stems, twigs, seeds, fruits, roots, wood or bark), according to the producing species. Essential oils are stored in several secretory structures such epidermic cells, secretory hairs, secretory ducts, secretory cavities, glandular trichomes or resin adducts [15][16][17][18][19]. These oils are hydrophobic in nature, liquid, soluble in alcohol, nonpolar or weakly polar solvents, waxes and oils.…”