MORFOANATOMIA FOLIAR DE Plectranthus verticillatus (L.f.) Druce (LAMIACEAE)

Aoyama, Elisa Mitsuko; Furlan, Marcos Roberto; Indriunas, Alexandre; Elias, Leticia

doi:10.18677/encibio_2020d48

Cited by 1 publication

(3 citation statements)

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“…Morphologically, P. ornatus presents with vegetative characteristics similar to other species of the genus Plectranthus (Lamiaceae), such as P. barbatus , P. neochilus [ 14 ], P. amboinicus [ 18 ], P. verticillatus [ 19 ], and P. neochilus [ 20 ]. This can also be one of the factors that can hinder the correct taxonomic identification of the species of the genus Plectranthus .…”

Section: Resultsmentioning

confidence: 99%

“…The petiole on the cross-sectional area had common characteristics with Peumus boldo, P. neochilus, P. verticillatus, and P. amboinicus [ 19 , 23 , 24 , 26 ], such as convex format and projections on the sides. The epidermis was uniseriate and composed of rectangular diminished cells, where both glandular and non-glandular trichomes were present ( Figure 3 E).…”

Section: Resultsmentioning

confidence: 99%

“…The presence of calcium oxalate, which was more concentrated in the petiole, reflects an adaptation in plants derived from differences in external factors, such as herbivory differences and formation of vegetative structures, and turns them into toxic ones [28], as observed in Plectranthus neochilus Schltr and reported by Duarte et al [26]. The petiole on the cross-sectional area had common characteristics with Peumus boldo, P. neochilus, P. verticillatus, and P. amboinicus [19,23,24,26], such as convex format and projections on the sides. The epidermis was uniseriate and composed of rectangular diminished cells, where both glandular and non-glandular trichomes were present (Figure 3E).…”

Section: Anatomical Characterizationmentioning

confidence: 95%

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Morphoanatomical, Histochemical, and Essential Oil Composition of the Plectranthus ornatus Codd. (Lamiaceae)

da Silva,

Correia,

Gurgel

et al. 2023

Molecules

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Plectranthus ornatus is a medicinal and aromatic plant used in traditional and alternative medicine. In this study, leaves of P. ornatus were collected in two cities of the state of Pará, “Quatipuru” and “Barcarena”, and were used with the objective of analyzing, through morphoanatomical data and histochemical and phytochemical studies of essential oil, the samples present structural differences and differences in their chemical composition. Anatomical and histochemical analyses were performed by transverse, using longitudinal sections of 8 μm to 10 μm to perform epidermal dissociation, diaphonization, and tests to identify classes of secondary metabolites. The essential oils were isolated by hydrodistillation, and the identification of the chemical composition was performed by gas chromatography coupled with mass spectrometry. The anatomical study shows that there is no difference between specimens collected in different locations, and stellate trichomes were identified. The histochemical study detected total lipids and acids, terpenes, polysaccharides, phenolic compounds, tannins, alkaloids, and calcium oxalate. The low essential oil yield may be related to the low density of secretory cells (glandular trichomes), the unidentified compounds in the highest concentration in the essential oil were in relation to the chemical composition of the essential oils, and the major compounds were α-pinene, sabinene, (E)-caryophyllene, caryophyllene oxide, and oct-1-en-3-ol. The results provide new information about the anatomy and histochemistry of P. ornatus.

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Section: Resultsmentioning

confidence: 99%