Morphology and phytochemistry of Teucrium chamaedrys L. (Lamiaceae) cultivated at the Ghirardi Botanic Garden (Lombardy, Northern Italy)

Giuliani, C.; Bottoni, Martina; Ascrizzi, Roberta; Milani, Fabrizia; Spada, Alberto; Flamini, Guido; Fico, Gelsomina

doi:10.1016/j.flora.2021.151898

Cited by 3 publications

(16 citation statements)

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“…The distribution pattern of the different trichomes types proved consistent with literature information, especially with reference to the peltate and short‐stalked capitates, being widespread on the whole plant epidermises of all the investigated congeneric species [6,11,12,17–20] . Concerning the long‐stalked morphotype, it was peculiar of the reproductive organs, specifically to the corolla, whereas in T. chamaedrys it exclusively occurred on the calyx [6,14] .…”

Section: Discussionsupporting

confidence: 87%

“…The long capitates were exclusive mucopolysaccharides producers, whereas they synthetized only terpenes in T. chamaedrys. [6] They produced, on the contrary, a complex secretion in S. brevibracteata, S. altissima, S. caucasica, and B. acetabulosa. [21,22,24,25] Previous works on congeneric species of Teucrium highlighted the general lipophilic secretion of the capitate morphotype by recording the positive response to Sudan Black, Nile Blue, and Osmium tetroxide reagents, [9,10] but no partition on capitate subforms was indicated.…”

Section: Micromorphological Surveymentioning

confidence: 99%

“…The short capitates showed an exclusive hydrophilic secretion, consisting of mucopolysaccharides, as widely documented in most of the studied members of Lamiaceae. [6,26] The medium and the ball-like capitates displayed heterogeneous secretion, due to the co-occurrence of terpenoids, along with polyphenolic or polysaccharidic fractions, respectively. The long capitates were exclusive mucopolysaccharides producers, whereas they synthetized only terpenes in T. chamaedrys.…”

Section: Micromorphological Surveymentioning

confidence: 99%

“…Teucrium, confirming the presence of the simple filamentous coating hairs on the whole plant surface. [6,14]…”

Section: Micromorphological Surveymentioning

confidence: 99%

“…In Tuscany, depurative and diuretic effects are ascribed to the leaf infusions, [3,5] while in Sicily, where the plant is commonly known as 'erba ricottara', the direct application of the leaves is a useful remedy in the case of haemorrhoids. [2] Micromorphological investigations were developed for several members of the genus Teucrium [6][7][8][9][10] mainly from the Mediterranean region, [6,[8][9][10][11]13,14] Iran, [12] and South Africa, [7] but no studies about the secreting structures of T. fruticans were reported. Previous Italian, Turkish, and Iranian works [11,12,14] highlighted the importance of the indumentum features on different plant parts as distinctive taxonomic characters at section level or for species classification.…”

Section: Introductionmentioning

confidence: 99%

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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: Discussionsupporting

confidence: 87%