Remoción de semillas por Dorymyrmex insanus (Hymenoptera: Formicidae) en una reserva ecológica en la Ciudad de México, México / Seed removal by Dorymyrmex insanus (Hymenoptera: Formicidae) in an ecological reserve in Mexico City, Mexico

Abstract Introduction: Seed removal by ants is an interaction that may greatly affect the dynamic and structure of the vegetation. This aspect is well known for granivorous ants; however, there is little information on the effect of omnivorous ants. Objective: To assess the potential impact of the omnivorous ant Dorymyrmex insanus on vegetation. Methods: In the Pedregal Reserve, Mexico City, we identified the items in the refuse piles of ten ant colonies, for one year, covering the rainy and dry seasons. For each season we calculated seed diversity and analyzed the possible relationship between seed size and their abundance in the refuse piles, with regression models. We also did germination tests with seeds of Tagetes micrantha, comparing seeds from piles and from plants. Results: D. insanus removed seeds of 19 plant species as well as plant remains (such as leaves, twigs, roots), and remains of insects. Seed diversity was higher in the rainy season but the greatest abundance was in the dry season. When analyzing the relationship between seed length and abundance in the refuse piles, we found that the ants preferred seeds of around 10 mm. We also found that more seeds of T. micrantha germinated when they were previously handled by ants. Conclusions: The ant D. insanus actively participates in the removal of seeds from several species, favoring germination, and seasonality affects the selectivity of resources.

Resumen Introducción: La remoción de semillas por parte de las hormigas es una interacción que puede afectar en gran medida la dinámica y estructura de la vegetación. Este aspecto es bien conocido para las hormigas granívoras; sin embargo, hay poca información sobre el efecto de las omnívoras. Objetivo: Evaluar el impacto potencial de la hormiga omnívora Dorymyrmex insanus sobre la vegetación. Métodos: En la Reserva Pedregal, Ciudad de México, se identificaron los ítems en el área del basurero para diez colonias de hormigas, durante un año, cubriendo la época de lluvia y sequía. Para cada temporada calculamos la diversidad de semillas y analizamos la posible relación entre el tamaño de las semillas y su abundancia en los basureros, con modelos de regresión. También hicimos pruebas de germinación con semillas de Tagetes micrantha, comparando las encontradas en los basureros con las provenientes de las plantas. Resultados: D. insanus eliminó semillas de 19 especies de plantas, así como restos de plantas (hojas, ramitas, raíces) y restos de insectos. La diversidad de semillas fue mayor en la estación lluviosa pero la mayor abundancia lo fue en la estación seca. Al analizar la relación entre la longitud de las semillas y la abundancia en el área del basurero, encontramos que las hormigas preferían semillas de alrededor de 10 mm. También encontramos que germinaron más semillas de T. micrantha cuando fueron manipuladas previamente por hormigas. Conclusiones: La hormiga D. insanus participa activamente en la remoción de semillas de varias especies, favoreciendo la germinación, y la estacionalidad afecta la selectividad de recursos.

Atividade antimicrobiana e citotoxicidade in vitro do óleo essencial de Tagetes minuta L. visando à aplicação no controle da mastite bovina / In vitro antibacterial and cytotoxicity activities of Tagetes minuta L. essential oil towards bovine mastitis treatment

O objetivo deste estudo foi avaliar a atividade antimicrobiana in vitro do óleo essencial de Tagetes minuta L. contra Staphylococcus aureus e Escherichia coli e a citotoxicidade sobre células epiteliais da glândula mamária bovina (MAC-T), visando a seu uso no tratamento da mastite bovina. A análise qualitativa do óleo revelou cis-tagetona (24,24%), di-hidrotagetona (16,65%), 1,3,6-octatrieno-3,7-dimetil-E (13,61%), trans-ocimenona (13,52%) e cis-ocimenona (10,06%) como compostos majoritários. Nos ensaios da atividade antimicrobiana, a concentração inibitória mínima (CIM) verificada foi de 1 mg/mL para a cepa padrão (ATCC 25923), cinco isolados de S. aureus provenientes de leite de vacas com mastite e a cepa padrão resistente à meticilina (MRSA) (ATCC 33592). Para a cepa padrão de E. coli (ATCC 8739) e dois isolados de leite de vacas com mastite, a CIM foi de 3 mg/mL. Elevado efeito citóxico do óleo sobre as células da linhagem MAC-T foi constatado. Concentrações superiores a 10 (g/mL do óleo resultaram em mais de 90% de morte celular. Tais resultados sugerem que, apesar da atividade antimicrobiana contra agentes causadores da mastite bovina, a utilização intramamária do óleo de T. minuta não seria recomendada. É importante destacar a sensibilidade da cepa MRSA ao óleo essencial, o que evidencia seu potencial como antisséptico e sanitizante.(AU)

The aim of this study was to evaluate the in vitro antimicrobial activity of Tagetes minuta L. essential oil against Staphylococcus aureus and Escherichia coli, and its cytotoxicity to bovine mammary epithelial cells (MAC-T line), aiming at its use for bovine mastitis treatment. The qualitative analysis of the oil by GC-MS identified cis-tagetone (24.24%), dihydrotagetone (16.65%), 1,3,6-Octatriene 3,7-Dimethyl-E (13.61%); trans-ocimenone (13.52%) and cis-ocimenone (10.06%) as major compounds. Antimicrobial activity was determined by broth microdilution technique and revealed the minimum inhibitory concentration of 1mg/mL for the standard strain of S. aureus (ATCC 25923) and five bacterias isolated from mastitic milk, including a multiresistant strain (ATCC 33592); and 3mg/ml for the standard strain of E. coli (ATCC 8739) and two bacterias isolated from mastitic milk. However, a strong citotoxic effect on MAC-T cells was found. Oil concentrations from 10(g/mL resulted in over 90% of cell death. The results suggest that although the antimicrobial activity was identified against the main agents of bovine mastitis, the intramammary use of T. minuta oil may not be recommended. On the other hand, it is important to highlight the sensibility of the MSRA strain to the essential oil, which evidences its potential as an antiseptic or sanitizer.(AU)

Fungitoxic Potentials of Extracts of Plant Origin against Fugal Root Rot of Cassava (Manihot esculenta Crantz) in Storage

Investigations were carried out on the use of the water and ethanolic extracts of Piper guineense, Ocimum graticimum, Casia alata, and Tagetes erecta in the management of postharvest deterioration of cassava root caused by Aspergillus flavus and Rhizopus stolonifer. Water and ethanolic extracts of the plant materials had significant differences (p≤0.5) in their rates of fungitoxicity on the pathogenic organisms. Water and ethanol extracts of C. alata and T. erecta respectively at 50% concentration gave the same highest radial growth inhibition of 80.20% on A. flavus in vitro followed by ethanol extracts of C. alata, O. graticimum, and P. guineense. The ethanolic extract of T. erecta at 50% concentration gave the highest inhibitory effect of 53.50% on R. stolonifer followed by ethanol extracts of C. alata, O. graticimum, and P. guineense whereas the least growth inhibition of 0.17% was recorded by aqueous extract of P. guineense on R. stolonifer. In vivo test of the plant extracts applied before and after inoculation with spore suspension (1x105 spores/ml of distilled water) of test fungi showed significant reduction in root rot incidence and severity. The lowest incidence and severity of cassava root rot of 16.5% and 1.45 respectively were recorded with T. erecta ethanol extracts applied before inoculation of A. flavus indicating that the extracts of the plant materials could be better used as protectant than eradicant in the control of post harvest fungal deterioration of cassava root. R. stolonifer showed stronger resistance to the extracts of the plant materials than A. flavus during pathogenesis in vivo.

A new disubstituted succinate from the roots of Tagetes erecta / 药学学报

Nine compounds were isolated from 95% ethanol extract of the roots of Tagates erecta by silica gel column chromatography and Sephadex LH-20 chromatography. Their structures were identified by spectroscopic data as 5-hydroxymethylfurfuryl methyl succinate (1), 5,7,3'-trihydroxyl-3,6,4'-trimethoxylflavone (2), syringic acid (3), 5,7,4'-trihydroxyl-3,6-trimethoxylflavone (4), patuletin-4'-methoxyl-7-O-β-D-glucopyranoside (5), patulitrin (6), 5,3'-dihydroxyl-3,6,4'-trimethoxylflavone-7-O-β-D-glucopyranoside (7), (2,2'-biththiophen)-5-ol (8), and 3-hydroxyl-4-methoxyl benzoic acid (9). Among them, compound 1 is a new disubstituted succinate and compound 8 was isolated from a natural resource for the first time. Compounds 2, 4, 5 and 9 were isolated from this genus for the first time. By measuring the biological activity and virulence of different compounds against soybean cyst nematode, it has found that compounds 1-8 exhibited a toxic effect on soybean cyst nematode, and ED50 values indicate that compounds 3 and 7 are the most potent, with ED50 values of 0.008 μg·mL-1.

Actividad antioxidante y marcha fitoquímica de los capítulos de Tagetes filifolia Lag. "pacha anís" / Antioxidant activity and phytochemical screening of capitula of Tagetes filifolia Lag. or "pacha anís"

Objetivo: Estudiar la actividad antioxidante y marcha fitoquímica de los capítulos de Tagetes filifolia Lag. "pacha anís".Materiales y métodos: Estudio de tipo experimental en el cual se empleó 5 kg de los capítulos de la planta medicinal Tagetes filifolia lag., provenientes de Junín. Se usó el método de cribado fitoquímico de Olga Lock para la marcha fitoquímica y el método DPPH para la determinación de la actividad antioxidante. Se dividió la muestra en 3 grupos: etéreo, alcohol etílico y agua destilada a concentraciones de 100, 50 y 5 µg/ml.Resultados: Se encontró fenoles en cantidades abundantes tanto en el extracto en agua destilada como en el extracto en alcohol etílico, además este último tuvo cantidades moderadas de quinonas. Por otro lado, el extracto en alcohol etílico fue el que presentó el mayor porcentaje de captación de radicales libres (91.26%) a una concentración de 100 µg/ml, similares resultados se encontró con el extracto etéreo (88.94%) y el extracto en agua destilada (75.58%).Conclusiones: Los principales componentes químicos fueron fenoles y quinonas. El mayor efecto antioxidante se obtuvo del extracto etanólico de la planta Tagetes filifolia a una concentración de 100 µg/ml.

Activity of Tagetes minuta Linnaeus (Asteraceae) essential oil against L3 Anisakis larvae type 1

OBJECTIVE@#To evaluate in vitro effects of Tagetes minuta L. essential oil (TEO) on L3 Anisakis larvae type 1.@*METHODS@#In order to evaluate the potential use of Tagetes minuta essential oil against L3 Anisakis larvae three different media were tested: 1) a saline solution (SS); 2) an industrial marinating solution (MS); 3) sunflower seeds oil (SO). For each media and concentrations of TEO (0.1%, 0.5%, 1.0% and 5.0% v/v), 20 parasites were introduced into plastic Petri dishes (diameter 90 mm) and maintained at room temperature. As controls, larvae were maintained without TEO under identical experimental conditions in SS, MS and SO. A total of 900 larvae were tested. The normalized mean viability, LT100, LT50 and the percentage of inactivation at 24 h were calculated.@*RESULTS@#In vitro tests revealed a complete inactivation of parasites in saline solution after 2 h with 5% and 1% of TEO. In marinating solution, a complete inactivation of parasites was observed after 4 h at all concentrations used. A slower activity for all TEO concentration was reported in SO.@*CONCLUSIONS@#The results obtained, showing a strong activity against Anisakis larvae, confirm TEO as a larvicidal agent in the treatment of human anisakidosis and in the industrial marinating process.

Tagetones A and B, new cytotoxic monocyclic diterpenoids from flowers of Tagetes minuta / 中国天然药物

Tagetones A (1) and B (2), two new monocyclic diterpenoids were isolated from the n-hexane fraction of fresh flowers of Tagetes minuta L. (Asteraceae). Their structures were established by multiple spectroscopic methods (IR, HR-ESI-MS, and 1D-, and 2D-NMR), in addition to comparison with literature data. Compound 1 showed cytotoxic activity towards MCF7 and A549 cancer cells with IC values being 4.68 and 4.24 µmol·L, respectively, compared to doxorubicin (IC 0.13 and 1.12 µmol·L, respectively). Compound 2 also exhibited significant activity against HCT116 cancer cells (IC, 6.30 µmol·L).

Activity of Tagetes minuta Linnaeus (Asteraceae) essential oil against L3 Anisakis larvae type 1

Objective To evaluate in vitro effects of Tagetes minuta L. essential oil (TEO) on L3 Anisakis larvae type 1. Methods In order to evaluate the potential use of Tagetes minuta essential oil against L3 Anisakis larvae three different media were tested: 1) a saline solution (SS); 2) an industrial marinating solution (MS); 3) sunflower seeds oil (SO). For each media and concentrations of TEO (0.1%, 0.5%, 1.0% and 5.0% v/v), 20 parasites were introduced into plastic Petri dishes (diameter 90 mm) and maintained at room temperature. As controls, larvae were maintained without TEO under identical experimental conditions in SS, MS and SO. A total of 900 larvae were tested. The normalized mean viability, LT100, LT50 and the percentage of inactivation at 24 h were calculated. Results In vitro tests revealed a complete inactivation of parasites in saline solution after 2 h with 5% and 1% of TEO. In marinating solution, a complete inactivation of parasites was observed after 4 h at all concentrations used. A slower activity for all TEO concentration was reported in SO. Conclusions The results obtained, showing a strong activity against Anisakis larvae, confirm TEO as a larvicidal agent in the treatment of human anisakidosis and in the industrial marinating process.

Avaliação da atividade antisséptica de sabonete líquido contendo extrato glicólico de flores de Tagetes patula L / Sessment of antiseptic activit y of liquid soap with glycolic extract of Tagetes patula l. flowers

Tagetes patula L. (Asteraceae), popularmente conhecida como cravo de defunto ou cravo francês, é utilizada na medicina popular como antisséptica, depurativa do sangue e repelente de insetos. O presente estudo avaliou a atividade antisséptica de sabonete líquido contendo extrato glicólico de T. patula 7,5% (p/v). O extrato glicólico foi obtido por turbo-extração utilizando propilenoglicol e etanol (7:3; v/v) a 10 % (p/v). A avaliação fitoquímica preliminar da droga vegetal indicou a presença de compostos fenólicos e teor de flavonoides de 5,73% ± 0,19 (CV = 3,33%). No teste para avaliação da atividade antimicrobiana houve a inibição do crescimento de Staphylococcus aureus na concentração de avaliada.

Tagetes patula L. (Asteraceae), or French marigold, known in Brazil as cravo-de-defunto, is used in folk medicine as antiseptic, blood thinner and insect repellent. Current study analyzes the antiseptic activity of the liquid soap with the glycolic extract of T.patula 7.5% (p/v). Glycolic extract was obtained by turbo-extraction with propylenoglycol and ethanol (7:3; v/v) 10 % (p/v). Preliminary photochemical evaluation of the vegetal drug showed phenolic compounds and flavonoid rates at 5.73% ± 0.19 (CV = 3.33%). When the pharmaceutical formulation was evaluated for antimicrobial activity, growth inhibition of Staphylococcus aureus occurred at the assessed concentration.

A brief review on medicinal plant Tagetes erecta Linn.

Medicinal plants, its derivatives and characterized secondary metabolites are widely used for medicinal purposes, are becoming popular all over the world as a natural alternative to synthetically produced chemicals both in Traditional and Allopathic system of medicine. The beneficial effect of herbal medicine typically result from the combination of secondary metabolites produced in the herbs such as glycosides, alkaloids, flavonoids, tannins, gums etc. There is a need for the documentation of research work carried out on these herbs, hence forth timely review on the herb Tagetes erecta Linn. Methodology used in the review is based on the published original research articles through exhaustive search through scientific databases; Saudi Digital Library, Pubmed, and Science Direct etc. Reviewed parameters are ethonomedicinal uses chemical constituents and pharmacological and non Pharmacological studies on medicinal plant Tagetes erecta Linn.

Extraction of flavonoids from Tagetes patula: process optimization and screening for biological activity

The flowers of Tagetes patula L., Asteraceae, commonly known as French marigold, are used in folk medicine as an antiseptic, diuretic, blood purifier and insect repellent. This study was conducted to optimize the extraction process through the biomonitoring of flavonoids, using a statistical mixture simplex-centroid design, to evaluate the effect of the solvents water, ethanol and acetone, as well as mixtures of these solvents, assessed by the total flavonoid content. The extracts were tested for dry residue, radical scavenging activity, chromatographic profile, and larvicidal activity. The acetone extract had the highest total flavonoid content, 25.13 ± 1.02% (4.07%); and the best radical scavenging activity, with IC50 of 15.74 μg/ml ± 1.09 (6.92%), but with lower dry residue, 6.62 ± 1.33% (20.10%). The water extracts showed higher levels of dry residue, but lower total flavonoid content and radical scavenging activity than the acetone extract. The positive correlation between the total flavonoid content and radical scavenging activity of the extracts showed that flavonoids contribute significantly to the antioxidant capacity. The statistical mixture design allowed us to optimize the extraction of flavonoids from flowers of T. patula, with acetone as the best extraction solvent. Preliminary studies on the biological activity of the optimized extracts demonstrated a larvicidal effect of the acetone extract on Aedes aegypti mosquitoes.

Anti-oxidative and anti-inflammatory effects of Tagetes minuta essential oil in activated macrophages

Objective:To investigate antioxidant and anti-inflammatory effects of Tagetes minuta (T. minuta) essential oil. Methods:In the present study T. minuta essential oil was obtained from leaves of T. minuta via hydro-distillation and then was analyzed by gas chromatography-mass spectrometry. The anti-oxidant capacity of T. minuta essential oil was examined by measuring reactive oxygen, reactive nitrogen species and hydrogen peroxide scavenging. The anti-inflammatory activity of T. minuta essential oil was determined through measuring NADH oxidase, inducible nitric oxide synthase and TNF-αmRNA expression in lipopolysacharide-stimulated murine macrophages using real-time PCR. Results:Gas chromatography-mass spectrometry analysis indicated that the main components in the T. minuta essential oil were dihydrotagetone (33.86%), E-ocimene (19.92%), tagetone (16.15%), cis-β-ocimene (7.94%), Z-ocimene (5.27%), limonene (3.1%) and epoxyocimene (2.03%). The T. minuta essential oil had the ability to scavenge all reactive oxygen/reactive nitrogen species radicals with IC50 12-15 μg/mL, which indicated a potent radical scavenging activity. In addition, T. minuta essential oil significantly reduced NADH oxidase, inducible nitric oxide synthaseand TNF-αmRNA expression in the cells at concentrations of 50 μg/mL, indicating a capacity of this product to potentially modulate/diminish immune responses. Conclusions:T. minuta essential oil has radical scavenging and anti-inflammatory activities and could potentially be used as a safe effective source of natural anti-oxidants in therapy against oxidative damage and stress associated with some inflammatory conditions.

Anti-oxidative and anti-inflammatory effects of Tagetes minuta essential oil in activated macrophages

<p><b>OBJECTIVE</b>To investigate antioxidant and anti-inflammatory effects of Tagetes minuta (T. minuta) essential oil.</p><p><b>METHODS</b>In the present study T. minuta essential oil was obtained from leaves of T. minuta via hydro-distillation and then was analyzed by gas chromatography-mass spectrometry. The anti-oxidant capacity of T. minuta essential oil was examined by measuring reactive oxygen, reactive nitrogen species and hydrogen peroxide scavenging. The anti-inflammatory activity of T. minuta essential oil was determined through measuring NADH oxidase, inducible nitric oxide synthase and TNF-α mRNA expression in lipopolysacharide-stimulated murine macrophages using real-time PCR.</p><p><b>RESULTS</b>Gas chromatography-mass spectrometry analysis indicated that the main components in the T. minuta essential oil were dihydrotagetone (33.86%), E-ocimene (19.92%), tagetone (16.15%), cis-β-ocimene (7.94%), Z-ocimene (5.27%), limonene (3.1%) and epoxyocimene (2.03%). The T. minuta essential oil had the ability to scavenge all reactive oxygen/reactive nitrogen species radicals with IC50 12-15 µg/mL, which indicated a potent radical scavenging activity. In addition, T. minuta essential oil significantly reduced NADH oxidase, inducible nitric oxide synthaseand TNF-α mRNA expression in the cells at concentrations of 50 µg/mL, indicating a capacity of this product to potentially modulate/diminish immune responses.</p><p><b>CONCLUSIONS</b>T. minuta essential oil has radical scavenging and anti-inflammatory activities and could potentially be used as a safe effective source of natural anti-oxidants in therapy against oxidative damage and stress associated with some inflammatory conditions.</p>

Actividad antibacteriana de los extractos de Cymbopogon citratus, Elionurus sp. y Tagetes minuta contra bacterias que causan mastitis / Antibacterial activity of essential oils of Cymbopogon citratus, Elionurus sp. and Tagetes minuta against bacteria that cause mastitis

Introducción: el uso inadecuado de los antimicrobianos es un importante factor de resistencia a estos. En medicina veterinaria, este factor puede influir en el rendimiento de los animales, como en el caso de la mastitis bovina. Objetivo: evaluar la actividad antibacteriana de los aceites esenciales e hidroalcohólicos, de Cymbopogon citratus (DC.) Stapf., Elionurus sp. y Tagetes minuta L. contra bacterias aisladas de leche bovina. Métodos: la actividad antimicrobiana de plantas se evaluó utilizando la técnica de microdilución con la determinación de la concentración inhibitoria mínima. Resultados: los aceites esenciales eran más activos que los hidroalcohólicos, con valores de concentración mínima inhibitoria entre 0,39 y 6,32; 0,10 y 6,32 %; así como de 0,62 a 5 %, para Cymbopogon citratus, Elionurus sp. y Tagetes minuta, respectivamente; mientras que en los extractos hidroalcohólicos, excepto para Tagetes minuta, solo se inhibió Streptococcus uberis con Elionurus sp., pero el extracto hidroalcohólico de Cymbopogon citratus no mostró actividad antibacteriana. Conclusiones: los resultados sugieren el uso de estas plantas como un antimicrobiano natural, que es eficaz sobre bacterias de la mastitis bovina.

Introduction: the inappropriate use of antimicrobials is a major driver of antimicrobial resistance. In veterinary medicine, this factor can influence on animal performance, as in the case of bovine mastitis. Objective: this study is aimed to evaluate the antibacterial activity of essential oils and hydroalcoholic of Cymbopogon citratus (DC.) Stapf., Elionurus sp. and Tagetes minuta L. and the bacteria isolated from bovine milk. Methods: the antimicrobial activity of plants was evaluated using the microdilution technique, determining minimum inhibitory concentration values. Results: the essential oils were more active than the hydroalcoholic, with minimum inhibitory concentration values between 6,32 to 0,39 %; 0,10 and 6,32 %; as well as 0,62 to 5 %, for Cymbopogon citratus, Elionurus and T. minuta, respectively; while EHAs, except for Tagetes minuta, only inhibited Streptococcus uberis to Elionurus sp., being that the hydroalcoholic the Cymbopogon citratus showed no antibacterial activity. Conclusions: these results suggest the use of these plants as natural antimicrobial, being effective against bacteria of bovine mastitis.

Determination of volatile organic compounds of Tagetes filifolia Lag. (Asteraceae) from Córdoba (Argentina) using HS-SPME analysis / Determinación de compuestos orgánicos volátiles de Tagetes filifolia Lag. (Asteraceae) proveniente de Córdoba (Argentina) utilizando análisis por HS-SPME

A headspace solid-phase microextraction (HS-SPME) method followed by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC–FID) are described for the analysis of volatile compounds in Tagetes filifolia Lag. The composition of the total aerial parts of the plant (whole plant) and the inflorescences, leaves and stems were studied separately using HS-SPME. As a result, 54 compounds were determined, of which 47 were identified. The major components observed in this analysis were trans-anethole and estragole. The HS-SPME method used for the analysis of volatile compounds of T. filifolia is simple, fast, effective, free from the use of solvents, and permits by an analysis of small amounts of samples to achieve better results in terms of the determination of the composition than those reported in the literature for the analysis of essential oil.

Se realizó el análisis de los componentes volátiles de Tagetes filifolia Lag. utilizando el método de microextracción en fase sólida del espacio de cabeza con análisis posterior por cromatografía de gases acoplada a espectrometría de masas y por cromatografía de gases con detección por ionización de llama. Se estudio la composición de la planta entera así como también la de las inflorescencias, hojas y tallos por separado empleando el método de HS-SPME. Como resultado, se determinaron 54 compuestos de los cuales 47 fueron identificados. Los componentes mayoritarios observados en este análisis fueron: trans-anetol y estragol. El método de HS-SPME utilizado para el análisis de los compuestos volátiles de T. filifolia es simple, rápido, efectivo, libre de la utilización de solventes, y permitió mediante el análisis de pequeñas cantidades de muestra alcanzar mejores resultados en cuanto a la determinación de la composición, que los reportados en literatura para el análisis del aceite esencial.

Caracteres micrográficos analíticos de hojas, tallos, inflorescencias-flores de Tagetes lucida Cav. (Asteraceae ­ Helenieae) / Micrographic analytical characters of leaves, stems, inflorescences-flowers of Tagetes lucida Cav. (Asteraceae - Helenieae)

Tagetes lucida Cav. (Asteraceae) es una especie nativa de América tropical, comúnmente usada en medicina vernácula y también como medicamento fitoterápico. La infusión se emplea como tónico para combatir la tos, dolores de cabeza, fiebre, cólicos, dolores abdominales, enfermedades gastrointestinales, dolor corporal y como emenagoga. Los extractos etanólicos de hojas de T. lucida presentan actividad bactericida. El objetivo de este trabajo fue realizar la micrográfica analítica de las partes usadas de esta especie a los fines de la estandarización de la droga cruda. Para ello, se estudió la morfología foliar, la epidermis de la hoja, los estomas, la arquitectura foliar, la estructura interna de hojas, tallos, inflorescencias y flores. En los tallos se han determinado dos tipos de estructuras secretoras coexistentes, conductos y cavidades secretoras de origen esquizógeno; mientras que en las hojas y brácteas involucrales solo encontramos cavidades. Los conductos secretores se caracterizan por presentar escaso diámetro, epitelio secretor uniestratificado y vaina parenquimática. En tanto, las cavidades secretoras son de diámetro conspicuo y epitelio secretor pluriestratificado sin la vaina parenquimática. Esta información es requerida no solo para los procedimientos de identificación que garanticen la utilización de la droga vegetal, sino para el control de calidad exigido en la producción de medicamentos fitoterápicos. (AU)

Chemical identification of Tagetes minuta Linnaeus (Asteraceae) essential oil and its acaricidal effect on ticks / Caracterização química e efeito acaricida do óleo essencial de Tagetes minuta Linnaeus (Asteraceae) em carrapatos

The control of tick species that affect animal production is vital for the economic welfare of the cattle industry. This study focused on testing the acaricidal activity of the essential oil from the leaves and stems of Tagetes minuta against several Brazilian tick species, including Rhipicephalus (Boophilus) microplus, Rhipicephalus sanguineus, Amblyomma cajennense and Argas miniatus. The chemical composition of the essential oil was determined by chromatography and spectroscopy analyses, which revealed the presence of monoterpenes. The adult immersion test (AIT) and the larval packet test (LPT) were used to evaluate the efficacy of T. minuta essential oil in tick management at concentrations of 2.5, 5, 10, 20 and 40%. The results demonstrated that the T. minuta essential oil had over 95% efficacy against four species of ticks at a concentration of 20%. These results suggest that the essential oil of T. minuta could be used as an environmentally friendly acaricide.(AU)

O controle de carrapatos que causa impacto na produção de bovinos possui importância econômica para a cadeia produtiva. Neste trabalho objetivou-se testar a atividade acaricida do óleo essencial das folhas e caules de Tagetes minuta contra várias espécies de carrapatos brasileiros, incluindo Rhipicephalus (Boophilus) microplus, Rhipicephalus sanguineus, Amblyomma cajennense e Argas miniatus. A composição química do óleo foi determinada por GC-MS e análises de espectroscopia de RMN, que revelaram a presença de monoterpenos. Na avaliação destas substâncias no controle do carrapato foram empregados os testes de imersão de adulto (TIA) e o de pacote de larvas (TPL) para o extrato de óleo de T. minuta nas concentrações de 2,5%; 5%; 10%; 20% e 40%. Os resultados do TPL e TIA demonstraram que o óleo essencial na concentração de 20% de T. minuta apresenta eficácia superior a 95% nas quatro espécies de carrapato. Estes resultados sugerem que o óleo essencial de T. minuta pode ser usado como um acaricida eficaz e com baixo impacto ambiental.(AU)

Control de calidad de drogas vegetales: lavado y desinfección de Artemisia annua L y Tagetes lucida Cav / Quality control of vegetable drugs: washing and disinfection of Artemisia annua L and Tagetes lucida Cav

Introducción: utilizar el lavado y desinfección química como método que permita disminuir la contaminación microbiana en el material vegetal cosechado de Artemisia annua L y Tagetes lucida Cav. Objetivos: garantizar la calidad microbiológica de las drogas vegetales obtenidas de estas 2 especies medicinales. Métodos: se utilizó material vegetal procedente de las parcelas establecidas en la Estación Experimental de Plantas Medicinales Dr Juan Tomás Roig, en suelo ferralítico rojo hidratado (ferralsols). Se emplearon 2 testigos, uno sin tratar y otro tratado con agua potable; para las pruebas a nivel de laboratorio las muestras de 300 g en A. annua y de 250 g de T lucida fueron lavadas con agua potable y después sometidas a un proceso de desinfección en una solución de hipoclorito de sodio 0,5 por ciento y 1,0 por ciento, sumergidas durante 5 y 10 min en ambos casos; para las pruebas de escalado se seleccionó el tratamiento químico que a nivel de laboratorio resultó más efectivo, se emplearon 3 réplicas de la droga cruda de 10 kg en el caso de A annua y de 6 kg en T lucida, con posterioridad las muestras se escurren sobre bastidores y después pasan a un proceso de secado en estufa de 35 a 40 ºC durante 2 d Luego de secadas se realizan los correspondientes análisis microbiológico y físico-químico. En el primer caso se determinó el conteo total de bacterias, conteo total de hongos y otras enterobacterias, además de microorganismos aislados. En el control físico- químico, los porcentajes de materia orgánica extraña; materia inorgánica extraña y hojas ennegrecidas; los índices numéricos como humedad, cenizas totales, sustancias solubles en agua, sustancias solubles en etanol 30 por ciento, sustancias solubles en etanol 70 por ciento, así como mediante tamizaje fitoquímico, la presencia de metabolitos secundarios...

Introduction: the use of washing and chemical disinfection as a method allows reducing microbial pollution in the harvested vegetal material of Artemisia annua L. and Tagetes lucida Cav Objectives: to assure the microbiological quality of vegetal drugs from these two medicinal species. Methods: there was used some vegetal material from lots on red hydrated ferralitic soils (ferrasols) located in Dr Juan Tomás Roig Experimental Center of Medicinal Plants. Two controls, one treated with drinking water and the other untreated, were used. For lab tests, the 300g A. annua and 250g T lucida samples were washed with drinking water and then were subjected to disinfection process using 0,5 and 1,0 percent sodium hypochloride in which both samples were submerged for 5 and 10 minutes. The most effective chemical treatment at lab was selected for the scaling test of three replicas of the crude drug from 10 kg of A annua and from 6 kg T lucida respectively. The samples were placed upon frames to be dried later at 35 to 40 ºC for 2 hours. After drying, the corresponding microbiological and physical-chemical analyses were performed. The microbiological analysis determined the total count of bacteria, of fungi and other enterobacteria in addition to isolated microorganisms. The physical and chemical analysis estimated the percentages of foreign organic matter, foreign inorganic matter and blackened leaves; and the indexes of humidity, total ashes, soluble substances in water, soluble substances in 30 percent etanol and soluble substances in 70 percent etanol...

In vitro schistosomicidal effects of the essential oil of Tagetes erecta

The in vitro schistosomicidal effects of the essential oil obtained from Tagetes erecta L. Asteraceae, leaves (TE-EO) collected in Brazil against Schistosoma mansoni worms are reported in this paper. The oil caused a significant decrease in the motor activity at 50 µg/mL as minimal concentration after 24 h. This oil also caused death of all the parasites and the separation of coupled pairs into individual male and female at 100 µg/mL after 24 h. The viability of adult worm groups treated with the TE-EO at 100 µg/mL was similar to that of groups treated with praziquantel (positive control). In addition, the oil promoted the inhibition of eggs development at all the tested concentrations. These data indicate that the TE-EO could be considered as a promising source for the development of new schistosomicidal agents.

Actividad inhibitoria de extractos y aceites esenciales de especies condimentarias, alimenticias y medicinales contra Campylobacter jejuni / Inhibitory activity of extracts and essential oils of species seasoning, nutritional and medicinal against Campylobacter jejuni

Los agentes químicos son los métodos de conservación más usados, pero no cumplen con el concepto de natural o seguro demandado por los consumidores, ya que algunos presentan cierta toxicidad. Por eso la industria busca antimicrobianos naturales para la conservación de alimentos. El propósito fue evaluar la actividad contra Campylobacter jejuni ATCC 33291 y dos aislamientos clínicos (C. jejuni UVG 62-1773-6 y C. coli UVG 62-1769-9) de extractos diclorometánico (ED), metanólico (EM) y aceite esencial (AE) de Cornutia grandifolia, Eryngium foetidum, Fernaldia pandurata, Lippia alba L. chiapasensis, L. graveolens, Ocimum micranthum, Pimienta dioica, Piper auritum, P.jacquemontianum, Psidiumguajava y Tagetes lucida.