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1.
China Pharmacy ; (12): 817-820, 2019.
Article in Chinese | WPRIM | ID: wpr-817049

ABSTRACT

OBJECTIVE: To study the chemical constituents from the petroleum ether part from whole herbs of Pteris vittata. METHODS: The petroleum ether part from whole herbs of P. vittata was separated and isolated by silica gel column, gel column, recrystallization and TLC. The structures of the compounds were identified according to physicochemical properties and spectrum data (1H-NMR and 13C-NMR). RESULTS: A total of 11 compounds were isolated and identified from the petroleum ether part from whole herbs of P. vittata, as (2R)-acetyl pterosin B (Ⅰ), palmitic acid (Ⅱ), hop-22(29)-ene (Ⅲ), epifriedelanol (Ⅳ), lupenone (Ⅴ), olean-18-en-3-one (Ⅵ), stigmasterol (Ⅶ), β-sitosterol (Ⅷ), 22-hydroxyhopane (Ⅸ), ergosterol (Ⅹ), β-sitosterol acetate (Ⅺ). CONCLUSIONS: Compounds Ⅰ-Ⅶ and Ⅸ-Ⅺ are isolated from this plant for the first time, and can provide theoretic reference for further studying bioactive pharmacodynamic substances in P. vittata and enriching chemical component data.

2.
Rev. cuba. farm ; 49(4)oct.-dic. 2015. ilus
Article in Spanish | LILACS, CUMED | ID: lil-780750

ABSTRACT

Introducción: las hojas de Pteris vittata L (helecho) son utilizadas por la población para el tratamiento de la candidiasis y en enfermedades producidas por bacterias en la piel. Objetivo: identificar preliminarmente las familias de metabolitos secundarios presentes en las hojas de la planta y evaluar su posible actividad antimicrobiana. Métodos: se recolectaron las hojas de Pteris vittata L. El material vegetal fue lavado, desinfectado, secado y seguidamente se procedió a su pulverización. Este polvo se utilizó en la elaboración de los diferentes extractos y tintura. La tintura obtenida se concentró y se fraccionó sucesivamente con n-hexano, cloroformo y acetato de etilo. A estos extractos se les realizó el tamizaje fitoquímico, ensayos microbiológicos y cromatografía de capa fina. Resultados: las pruebas in vitro efectuadas a los extractos obtenidos a partir de la tintura 20 por ciento, demostraron que éstos presentan actividad antimicrobiana frente a Escherichia coli, Staphylococcus aureus, destacándose los resultados obtenidos frente a Candida sp para los extractos de acetato de etilo y clorofórmico. En estas fracciones están presentes en mayor proporción alcaloides y quinonas, que podrían ser los responsables de esta actividad, lo cual se corrobora con la identificación de estos metabolitos secundarios mediante la cromatografía de capa fina y el tamizaje fitoquímico realizado. Conclusiones: el estudio combinado mediante la cromatografía de capa fina y el tamizaje fitoquímico de los extractos hexánico, acetato de etilo y clorofórmico permite inferir que la actividad antimicrobiana puede deberse a la presencia de quinonas y alcaloides(AU)


Introduction: Pteris vittata L. leaves (fern) are used by people on the candidiasis treatment and some skin illnesses caused by bacteria. Objective: to identify preliminarily the secondary metabolites present in the leaves of the plant and to evaluate their possible antimicrobial activity. Methods: Pteris vittata L. leaves were collected. The plant material was washed, disinfected, dried and pulverized. The powder obtained was used to make the various extracts and the tincture. The latter was concentrated and successively fractionated with n-hexane, chloroform, and ethyl acetate. The extracts underwent phytochemical screening, microbiological assays and thin-layer chromatography. Results: in vitro tests performed in the obtained extracts from the 20 percent tincture proved that they have antimicrobial activity against Escherichia coli and Staphylococcus aureus, emphasizing the accomplished results against Candida of the ethyl and chloroform acetate extracts. Alkaloids and quinones, which are found in large proportion in the extracts, would be responsible of the above- mentioned antibacterial activity. This was corroborated by the identification of these secondary metabolites through thin-layer chromatography and phytochemical screening. Conclusions: the combined study through thin-layer chromatography and phytochemical screening of the ethyl and chloroform acetate extracts showed that the antimicrobial activity could be possible due to the alkaloids and quinones presence(AU)


Subject(s)
Humans , Candidiasis/therapy , Pteris , Dermatologic Agents/therapeutic use , Phytotherapy , Chromatography, Thin Layer/methods
3.
J Environ Biol ; 2012 Jul; 33(4): 683-687
Article in English | IMSEAR | ID: sea-146756

ABSTRACT

An attempt was made to standardize the protocol for the shoot regeneration via caulogenesis in Pteris vittata L. employing leaf primordium explants. Calli were induced on Murashige and Skoog’s (MS) and Parkers and Thompson’s (P and T) media supplemented with different combinations of 2, 4-dichlorophenoxyaceticacid (2, 4-D), 6-benzylaminopurine (BAP), a-naphthalene acetic acid (NAA) and Indole - 3-acetic acid (IAA). A combination of full strength MS medium with 2, 4-D (2.26 µM) and BAP (2.22 µM) was found to be ideal for profuse callusing (80%) against other combinations. More shoot differentiation (2.8±0.06) was achieved from the calli on one-fourth strength of P and T media fortified with BAP (4.44 µM) and NAA (2.68 µM) when compared to other combinations but statistically not significant.

4.
Rev. biol. trop ; 60(2): 857-865, June 2012. ilus
Article in English | LILACS | ID: lil-657824

ABSTRACT

Ferns, which are usually colonizing different environments and their roots frequently present mycorrhization, have two adult stages in their life cycle, the sporophytic and the gametophytic phase. This paper describes the experimental mycorrhizal association between Pteris vittata leptosporangiate fern and a strain of Glomus intraradices during the life cycle of the fern, from spore germination to the development of a mature sporophyte. The aim of this study was to compare the colonization pattern of in vitro cultures of G. intraradices along the fern life cycle with those found in nature. For this, mature spores were obtained from fertile P. vittata fronds growing in walls of Buenos Aires city, Argentina. Roots were stained and observed under the light microscope for arbuscular mycorrhizal colonization. Approximately, 75 fern spores were cultured in each pot filled with a sterile substrate and G. intraradices (BAFC N° 51.331) as inoculum on the surface. After germination took place, samples were taken every 15 days until the fern cycle was completed. In order to determine colonization dynamics each sample was observed under optical and confocal microscope after staining. Gametophyte was classified as Adiantum type. Male and female gametangia were limited to the lower face, mycorrhizal colonization started when they were differentiated and took place through the rhizoids. Spores and vesicles were not found in this cycle stage. Paris-type mycorrhizal colonization was established in the midrib and in the embrionary foot. It was colonized by external mycelium. When the first root was developed soil inoculum colonized de novo this structure and Arum-type colonization was observed. This study proves that the type of colonization is determined by the structure of the host, not by the fungus. Both the gametophyte and embryo foot have determined growth and Paris-type colonization, while, sporophyte roots have undetermined growth and Arum-type colonization. The structures found in vitro cultures were highly similar to those found under natural conditions. Rev. Biol. Trop. 60 (2): 857-865. Epub 2012 June 01.


Los helechos presentan dos etapas en su ciclo de vida, una fase esporofítica y una gametofítica. Estos por lo general pueden colonizar diferentes ambientes y frecuentemente presentan raíces micorrizadas. Este estudio describe la asociación experimental entre Pteris vittata, un helecho leptosporangiado y una cepa de Glomus intraradices durante el ciclo de vida del helecho, desde la germinación de las esporas hasta el desarrollo del esporofito maduro. El objetivo de este estudio fue comparar los patrones de colonización de G. intraradices a lo largo de todo el ciclo de vida del helecho con los tipos encontrados en la naturaleza. Las esporas maduras fueron obtenidas de frondes fértiles de P. vittata que crecen sobre las paredes de la ciudad de Buenos Aires, Argentina. Las raíces se tiñeron y fueron observadas bajo microscopio óptico para el estudio de la colonización micorrízica. Aproximadamente 75 esporas de helecho se cultivaron en macetas con un sustrato estéril y con un inóculo de G. intraradices (N° 51.331 BAFC) en la superficie. Después de la germinación, se tomaron muestras cada 15 días hasta que se completó el ciclo de vida del helecho. Con el fin de determinar la dinámica de la colonización, cada muestra se observó con el microscopio óptico y el microscopio de confocal luego de la tinción correspondiente. El gametofito fue clasificado como del tipo “Adiantum”. Los gametangios femeninos y masculinos se desarrollaron en la cara inferior del mismo. La micorrización comenzó cuando los gametangios estaban ya diferenciados y la colonización se produjo a través de los rizoides. Las esporas y las vesículas no se encontraron en esta fase del ciclo. La micorrizacion tipo Paris se observó sobre la línea de la nervadura central. El pie del esporofito fue colonizado por el micelio externo. Cuando la raíz se desarrolló, se colonizó “de novo”, y se observó una colonización de tipo Arum. Este estudio demuestra que el tipo de colonización está determinado por la estructura del helecho y no por el hongo. Tanto el gametofito como el pie del embrión tienen crecimiento definido y colonización tipo Paris, mientras que las raíces del esporofito presentan un crecimiento indeterminado y una colonización tipo Arum. Las estructuras que se encontraron bajo cultivo coinciden con las que se encontraron en condiciones naturales.


Subject(s)
Glomeromycota/physiology , Mycorrhizae/physiology , Pteris/microbiology , Germ Cells, Plant/microbiology , Spores
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