CARACTERIZAÇÃO ANATÔMICA, COMPOSIÇÃO MINERAL E ATIVIDADE CITOTÓXICA DE Talinum triangulare (Jacq.) Willd (PORTULACACEAE)

Abstract

This study aimed to assess chemical compositions and anatomy of Talinum triangulare extract and its cytotoxic activity in order to improve the knowledge of the specie. Leaves and stem fragments were fixed, sectioned and stained following the usual techniques in anatomy. The phytochemical screening was performed according to classical tests for secondary metabolites detection. Cytotoxicity was evaluated using as model the lethality of Artemia salina larvae. The studied leaf is amphistomatic and presents uniseriate epidermis covered by thin cuticle. The mesophyll is dorsiventral and the midrib consists of collateral vascular bundle. In the apical portion, the stem has vascular bundles delimiting the medular and cortical regions. A stratum of angular collenchyma is found beneath the epidermis. In the basal portion, the stem has about four layers of angular collenchyma and voluminous parenchyma cells internally delimiting the cortex. The phytochemical screening detects the presence of alkaloids, flavonoids, coumarins, terpenes and steroids. The mineral composition showed that the major element found was nitrogen, followed by potassium and magnesium, and the leaves are iron rich. The ethanolic extract did not show toxicity in the larvae of A. salina, with LD50> 1000 ppm, which proves the safe use of this specie in popular therapy.

Anatomical and histochemical characterization of the vegetative organs of Talinum fruticosum (L.) Juss.

“…Em Talinum triangulare (Jacq.) Willd foi descrito formato do caule triangular (Brasileiro et al, 2016). Em seguida observa-se 1-2 camadas de colênquima angular (Figura 2B).…”

“…Em seguida observa-se 1-2 camadas de colênquima angular (Figura 2B). Em estudo anatômico com T. fruticosum encontrada na Índia foi observada característica semelhante (Pal & Rahaman, 2014) e em T. triangulare foram descritas quatro camadas de colênquima angular (Brasileiro et al, 2016). Observa-se parênquima fundamental logo após o colênquima (Figuras 2A e 2B).…”

“…É classificada como anfiestomática, com estômatos paracíticos em ambas as faces (Figuras 4A e 4B), característica que se assemelha com o descrito por Pal e Rahaman (2014) para T. fruticosum da Índia. Em T. triangulare foi descrito células epidérmicas sinuosas em ambas as faces, com lâmina foliar anfiestomática e estômatos do tipo anomocítico na face adaxial e paracítico na face abaxial (Brasileiro et al, 2016). Os estômatos paracíticos e ocasionalmente estômatos laterocíclicos foram encontrados por Adenegan-Alakinde e Ojo (2019) para T. triangulare.…”

Comparative anatomical studies of two species of <i>Talinum</i> occurring in southwestern, Nigeria

“…Vascular bundle is arc shaped and amphicribral in T. paniculatum but collateral closed in T. triangulare. The dorsiventral nature of the midrib and presence of collateral bundle in T. triangulare was reported by Brasilero et al, (2016) Petioles provide many useful anatomical characters and are widely used in other aspects of taxonomy and have been largely applied to the elucidation of phylogenetic relationship (Unamba et al, 2011. The distinguishing characters of taxonomic value include the variation in shapes of the petioles, the variation in the number, arrangement and shape of vascular bundles, type and mode of distribution of trichomes on the petioles as well as types and distribution of crystals on the petioles (Essiett, 2010).…”

Aspectos E Impactos Ambientais De Um Matadouro Frigorífico

“…Estudo realizado em Viçosa -MG, por Brasileiro et al (2016), indicou que está espécie de vegetal é considerada de uso tradicional e atualmente são menos utilizados em favor de outras espécies exóticas, e a disponibilidade destes vegetais tem declinado drasticamente devido ao aumento de outras culturas que incluem eliminação química de vegetais selvagens e mudança no habitat.…”