Morphological Characteristics of Teucrium Species: Vegetative Morphology

Özcan, Taner

doi:10.1007/978-3-030-52159-2_2

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…The target species was studied in association with congeneric species from the same geographical areas or in relation to habitat-related adaptation. [17] Altogether the above-mentioned micromorphological traits proved to have taxonomic value for sectional and interspecific classification in the genus. [18][19][20] However, the indumentum features of the target species were never thoroughly investigated, and this work represents the first in-depth report about its secretory structures.…”

Section: Micromorphological Surveymentioning

confidence: 99%

Teucrium fruticans L., a Multi‐Scale Study: From Trichomes to Essential Oil

Giuliani

Bottoni

Santagostini

et al. 2023

Chemistry & Biodiversity

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This work represents the first multi-scale study on Teucrium fruticans L. cultivated at the Ghirardi Botanic Garden (Lombardy, Northern Italy), combining a micromorphological and a phytochemical survey on the plant's aerial parts. Micromorphological investigations, performed by Light Microscopy, Fluorescence Microscopy and Scanning Electron Microscopy, highlighted the presence of five trichomes morphotypes, distinguished by a different distribution pattern: peltates, short-stalked and ball-like medium-stalked capitates, ubiquitous on the whole plant, medium-stalked and long-stalked capitates, exclusive to the floral whorls. Both peltates and medium-stalked capitates were recognized as the main terpene production sites. Phytochemical characterization focused on the essential oils (EOs), obtained by Clevenger-type hydrodistillation in February and April 2022 and characterized by Gas Chromatography-Mass Spectrometry (GC/MS), which resulted mainly formed by sesquiterpene hydrocarbons. The February EO profile was characterized by β-caryophyllene (28.30 %) and germacrene D (19.16 %) as main compounds, while in April β-myrcene was detected at high percentage (13.77 %), in addition to the previous two components (15.72 % and 11.55 %, respectively). Literature data, dealing with the biological activities of the main oil constituents, highlighted an anti-microbial, antiinflammatory, and anti-tumor potential, due to the high content in sesquiterpenes and, particularly, of βcaryophyllene and germacrene D.

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Section: Micromorphological Surveymentioning

confidence: 99%

Teucrium fruticans L., a Multi‐Scale Study: From Trichomes to Essential Oil

Giuliani

Bottoni

Santagostini

et al. 2023

Chemistry & Biodiversity

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“…The genus Teucrium L. belongs to Lamiaceae family and is a well-known medicinal plant with different biological activities (Elmasri et al 2015, Rechinger 1982. This genus is represented by 400 species all over the world and 19 species in Iran (Jamzad 2012, Ozcan 2020. Teucrium species are generally distributed in the west of the Mediterranean region, northwest and south of America, north and south of Africa, Australia, New Zealand, and the temperate regions of Asia (Bukhari et al 2015, Navarro 2020.…”

Section: Introductionmentioning

confidence: 99%

“…Teucrium species are generally distributed in the west of the Mediterranean region, northwest and south of America, north and south of Africa, Australia, New Zealand, and the temperate regions of Asia (Bukhari et al 2015, Navarro 2020. Its vegetative forms are shrub, subshrub, biennial, perennial, and annual in mountains, hills, wetlands, and deserts (Navarro 2020, Ozcan 2020, Rechinger 1982.…”

Section: Introductionmentioning

confidence: 99%

Flavonoid components, chemotypes, and candidate chemical markers of Teucrium (Lamiaceae) species using HPLC-MQ-API-MS/MS

Moghadam

Kharazian

Lorigooini

2022

ABot

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Belonging to Lamiaceae family, the genus Teucrium L. is a rich source of secondary metabolites used in pharmacology and industrial medicine. This study aimed to investigate the flavonoid contents of methanol extract and the chemical markers of Teucrium at specific and infraspecific levels and identify the chemotypes of its accessions. Nineteen accessions, eight species, and five subspecies were collected from three sections (Teucris, Polium, and Scordium) belonging to the natural habitats in the west, southwest, centre, and south of Iran. Total flavonoid extraction was attained by the air-dried leaf of Teucrium species and 90% methanol. HPLC coupled with triple quadrupole mass analyser was applied to screen and identify the chemical constituents. Multivariate analyses were implemented by cluster and principal component analysis. Chemical investigation specified 148 chemical compounds, of which 135 flavonoids were tentatively identified. The most abundant derivatives belonged to flavones (41 derivatives), flavonols (37 derivatives), and isoflavonoids (22 derivatives). Based on the cluster analysis, 13 groups of chemical markers were formed in sections Teucris and Scordium and five groups in section Polium as chemotaxonomic indicators. The specified chemotypes were represented by ten in the sections Teucris and Scordium and by six in the section Polium. A relationship was suggested between type and flavonoid quantity (number), altitude, and geographical location. The present study provided valuable information for pharmacological research, bioactivity assessment, and chemotaxonomic purposes. This is the first report on the presence of chemotypes, chemical markers, and quality assessments for the genus Teucrium.

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“…The morphological characteristics of Teucrium species are presented in two separate chapters. A chapter devoted to the morphology of vegetative organs addresses variation in vegetative traits, including life forms [ 2 ]. Particular attention is paid to variation in leaf shape.…”

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confidence: 99%