oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
The germination of bush mint (Hyptis marrubioides EPL.) seeds as a function of harvest stage, light, temperature and duration of storage
Sales, Juliana de Fátima;Pinto, José Eduardo Brasil Pereira;Oliveira, Jo?o Almir de;Botrel, Priscila Pereira;Silva, Fabiano Guimar?es;Corrêa, Ricardo Monteiro;
Acta Scientiarum. Agronomy , 2011, DOI: 10.4025/actasciagron.v33i4.4611
Abstract: this study evaluated the effect of light, temperature, physiologic stage at harvest and length of time on the germination of hyptis marrubioides seeds. two trials were conducted. the first experiment was performed immediately after the seed harvest and consisted of a 2 x 3 x 3 factorial design with 2 environmental conditions (light and dark), 3 temperatures (20, 30 and 20/30oc) and 3 seed harvest times (green colored seeds, light brown seeds and dark brown seeds). the second experiment was conducted in the presence of light at a temperature of 30oc and consisted of a 4 x 3 factorial design, with 4 storage times (0, 6, 12 and 18 months) and the 3 three harvest physiologic stages used in the previous experiment. both of the experiments were conducted in randomized blocks, with 4 replications of 100 seeds. light did not affect germination. by contrast, a temperature of 20oc retarded the germination process, although the percentage of germinating seeds was not affected. seed storage and the different harvest physiologic stages affected the germination velocity index (ivg) and the germination percentage. seeds that were harvested at the more mature stage (dark brown color) could be stored for up to 18 months.
Teor e composi??o química do óleo essencial de Hyptis marrubioides Epling (Lamiaceae) em diferentes genótipos
Botrel, P.P.;Pinto, J.E.B.P.;Figueiredo, F.C.;Bertolucci, S.K.V.;Ferri, P.H.;
Revista Brasileira de Plantas Medicinais , 2009, DOI: 10.1590/S1516-05722009000200009
Abstract: hyptis marrubioides epling ("hortel?-do-campo") is a medicinal species known for its activities against gastrointestinal and skin infections, pains and cramps. the aim of this work was to evaluate essential oil content and chemical composition in h. marrubioides of different genotypes (purple and white), as well as fresh plant parts (leaves, inflorescences and stem). the studied genotypes were identified based on the inflorescences, which are purple and white. the experimental design was completely randomized, including the three parts of both genotypes, in a 3x2 factorial arrangement, with four replicates. essential oil was extracted through hydrodistillation for two hours and analyzed using gas chromatography attached to a mass spectrometry (gc-ms). the highest essential oil content was found for the inflorescence of purple genotype. hyptis marrubioides essential oil composition quantitatively varied among the analyzed plant parts and between genotypes. the compound α-thujone had the highest percentage of apex area in inflorescences of purple genotype. the percentages of purple genotype were on average higher than those of white one.
Varia??es no teor e na composi??o volátil de Hyptis marrubioides EPL: cultivada no campo e em casa de vegeta??o
Botrel, Priscila Pereira;Pinto, José Eduardo Brasil P.;Araújo, Ana Clara Caxito de;Bertolucci, Suzan Kelly Vilela;Figueiredo, Felipe Campos;Ferri, Pedro Henrique;Costa, Deomar Plácido da;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000100007
Abstract: this work describes the chemical composition of the volatile oil of hyptis marrubioides cultivated in field and greenhouse. the experimental design was completely randomized, with ten replications for each type of cultivation. the volatile oil was extracted by hydrodistillation and analyzed by gc-ms. the highest content of volatile oil was found for plants grown in field. the highest percentage of the compounds present in oils was observed in samples grown in the field, such as germacra-4(15),5,10(14)-trien-1-α-ol (16.34%), β-caryophyllene (10.42%), γ-muurolene (12.83%) and trans-thujone (9.98%). however, some compounds were found only in plants grown in a greenhouse, such as cis-muurol-5-en-4α-ol (10.84%), α-cadinol (3.06%) and eudesma-4(15),7-dien-1β-ol (6.82%).
Growth, production and chemical composition of the essential oil in hortel -do-campo (Hyptis marrubioides Epl.) in function of the irradition level / Influência do nível de irradiancia no crescimento, produ o e composi o química do óleo essencial de hortel -do-campo (Hyptis marrubioides Epl.)  [cached]
Juliana de Fátima Sales,José Eduardo Brasil Pereira Pinto,Pedro Henrique Ferri,Fabiano Guimar?es Silva
Semina : Ciências Agrárias , 2009,
Abstract: In the present work, the level of irradiation of 20, 60 and 100% of natural light on the growth, content and composition of the essnetial oil of “hortel do campo” (Hyptis marrubioides) was evaluated. The experiment was conducted in the completely randomized design with twenty-five replicates per treatment. After 132 days of cultivation, plant growth and the content and compositoin of the essntial oil were investigated. At 100% of irradiation, the plants presented less height as compared with the shaded treatments. The ratio branch/leaf was higher at the level of irradiation of 20%. It was found that in the full sunshine, the plants showed lower height as compared with the shaded treatments. The leaf/ branch ratio was higher at the lowest level of irradition of 20%. The number of branches and the plant mass accumulation were greatest at the level of irradition of 100%. The content of essential oil was not influenced by the levels of irradiation, but the yield was greater when grown at the level of 100% of irradiation. The chemical composition of the essential oil of Hyptis marrubioides did not present any alterations with the different levels of irradiation, except for iso-3-tujanol and ?-cadineno, which presented highest concentrations in plants grown, respectively at 100 and 60% of irradiation. The major component of teh essential oil of H. marrubioides, independent of the levels of irradiation was cistujona oxygenated monoterpene (37.78%), followed by sequiterpenes hiydrocarbonetes (E)-cariofileno (14.93%), ?-copaeno (11.03%) and ?-muuroleno (9.60%). No presente trabalho avaliou-se o nível de irradiancia de 20, 60 e 100% de luz natural no crescimento, teor e a composi o do óleo essencial de hortel -do-campo (Hyptis marrubioides). O experimento foi conduzido no delineamento inteiramente casualizado, com vinte e cinco repeti es por tratamento. Após 132 dias de cultivo analisou-se o crescimento da planta, o teor e a composi o do óleo essencial. Em 100% de irradiancia as plantas apresentaram menor altura, quando comparado aos tratamentos sombreados. A rela o ramo/folha foi maior no nível de irradiancia de 20%. O número de ramos e o acúmulo de fitomassa foram maiores no nível de irradiancia de 100%. O teor de óleo essencial n o foi influenciado pelos níveis de irradiancia, mas o rendimento foi maior quando cultivadas a 100% de irradiancia. A composi o química do óleo essencial n o apresentou altera es com os diferentes níveis de irradiancia, exceto para o iso-3-tujanol e ?-cadineno, que apresentaram maiores concentra es em plantas cultivadas respec
Hyptis uliginosa (lamiaceae) en la Argentina  [cached]
Sara G. Tressens,Héctor A. Keller
Darwiniana , 2003,
Abstract: Se cita por primera vez para la Argentina a Hyptis uliginosa, perteneciente a la sección Plagiotis. Ninguna de las tres especies de esta sección había sido mencionada aún para nuestro país. Se describe e ilustra la nueva cita y se incluye una clave para identificar las especies de Hyptis de Argentina
Propaga??o vegetativa de Hyptis leucocephala Mart. ex Benth. e Hyptis platanifolia Mart. ex Benth. (Lamiaceae)
Oliveira, L.M;Nepomuceno, C.F;Freitas, N.P;Pereira, D.M.S;Silva, G.C;Lucchese, A.M;
Revista Brasileira de Plantas Medicinais , 2011, DOI: 10.1590/S1516-05722011000100011
Abstract: the genus hyptis (lamiaceae) has a special metabolism with remarkable variability and predominance of essential oils of great value to the various communities that use these plants due to their therapeutic properties. a number of studies on this genus have demonstrated that its essential oils present antimicrobial, antifungal, cytotoxic, anti-inflammatory, anti-hiv and insecticidal activities. however, few studies have focused on the sustainable exploitation of these species. the aim of this study was to evaluate the effect of different types of cuttings and different concentrations of indolebutyric acid (iba) on the survival, growth and rooting rates of cuttings from hyptis leucocephala mart. ex benth. and hyptis platanifolia mart. ex benth., species endemic to the semi-arid region of northeastern brazil and with largely proven medicinal value. the experiment lasted four months. apical, middle-apical, middle-basal and basal cuttings were treated with 0, 1000, 2000 and 4000 mg l-1 iba solutions for 5 min. the use of apical, middle-apical and middle-basal cuttings induced by 2000 and 4000 mg l-1 iba led to the best results for vegetative propagation of h. leucocephala. for h. platanifolia, the best results were obtained using middle-basal and basal cuttings treated with iba at 2000 and 4000 mg l-1.
Chemical composition and antifungal activity of the essential oil of Hyptis ovalifolia Benth. (Lamiaceae)
Oliveira, Cecília M. A. de;Silva, Maria do Rosário R.;Kato, Lucília;Silva, Cleuza C. da;Ferreira, Heleno D.;Souza, Lúcia K. H.;
Journal of the Brazilian Chemical Society , 2004, DOI: 10.1590/S0103-50532004000500023
Abstract: the leaves of hyptis ovalifolia benth. (lamiaceae) were subjected to hydrodistillation and the resulting volatiles were investigated by gc/ms. the main constituent representing 60% of the essential oil was isolated by column chromatography and identified by spectroscopic methods as (r)-6-[(z)-1-heptenyl]-5,6-dihydro-2h-pyran-2-one (1). this compound showed strong in vitro activity against four dermatophyte fungi microsporum canis, microsporum gypseum, tricophyton mentagrophytes, and tricophyton rubrum (a total of 60 strains) with a minimal inhibitory concentration observed in the range of 125-7.8 mg μl-1.
Gastroprotective and Ulcer Healing Effects of Essential Oil of Hyptis martiusii Benth. (Lamiaceae)  [PDF]
Germana Freire Rocha Caldas, Alisson Rodrigo da Silva Oliveira, Alice Valen?a Araújo, Dafne Carolina Alves Quixabeira, Jacinto da Costa Silva-Neto, Jo?o Henrique Costa-Silva, Irwin Rose Alencar de Menezes, Fabiano Ferreira, Ana Cristina Lima Leite, José Galberto Martins da Costa, Almir Gon?alves Wanderley
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0084400
Abstract: Hyptis martiusii Benth. is an aromatic plant found in abundance in northeastern Brazil that is used in ethnomedicine to treat gastric disorders. The aim of this study was to elucidate the mechanisms of action involved in the gastroprotection of the essential oil of Hyptis martiusii (EOHM) and to evaluate its healing capacity. Wistar rats were exposed to different protocols and subsequently were treated with 1% Tween-80 aqueous solution (negative control), pantoprazole, carbenoxolone, N-acetylcysteine (depending on the specificity of each model) or EOHM. The antisecretory activity (basal or stimulated) was determined using the pyloric ligature method. The gastroprotective action of nitric oxide and sulphydryl groups (–SH groups), as well as the quantification of adherent mucus and the levels of malondialdehyde and –SH groups in gastric mucosa, were evaluated using ethanol-induced gastric ulcer model. The healing ability was evaluated using the acetic acid-induced gastric ulcer model and histological and immunohistochemical analysis (HE, PAS and PCNA). EOHM (400 mg/kg) reduced the volume and acidity of gastric secretion stimulated by histamine and pentagastrin. The gastroprotective effect of EOHM involves the participation of endogenous sulfhydryl groups. EOHM increased mucus production (54.8%), reduced levels of MDA (72.5%) and prevented the depletion of –SH groups (73.8%) in the gastric mucosa. The treatment with EOHM reduced in 70.3% the gastric lesion area, promoting significant regeneration of the gastric mucosa, as confirmed by histological analysis and analysis of proliferating cell nuclear antigen. The results show that gastroprotective effect of EOHM is mediated by cytoprotective and antioxidant mechanisms and by their antisecretory activity, and suggest that the essential oil of Hyptis martiusii is a promising candidate for the treatment of gastric ulcers.
Estudio palinológico de los géneros Hyptis y Salvia (Lamiaceae) en el Parque Nacional ?El Avila?, Venezuela
Orsini,Giovannina; Rinaldi,Milagro; Velázquez,Dilia;
Ernstia , 2006,
Abstract: the pollen morphology of 12 species and 3 varieties of the genera hyptis and salvia (nepetoideae: lamiaceae) were described as a contribution to the palynological flora of venezuela and to the systematics of the family. acetolyzed grains were measured and photographed using a light microscope. non acetolyzed grains were coated with an au/pd film and then analyzed under a scanning electronic microscope (sem). the pollen of the taxa studied may be grouped into two types allowing separation of the two genera: ?type a? with equidistant colpi (hyptis) and ?type b? with non-equidistant colpi (salvia). all the pollen grains observed are hexacolpate, except for an octocolpate variant in hyptis vilis. keys using quantitative and qualitative characters are presented as an aid to identify the different pollen types studied. additionally, the presence of a distribution pattern of colpi in pollen grains of salvia is enfatized.
Preliminary study on the anti-inflammatory and antioxidant activities of the leave extract of Hyptis fruticosa Salzm. ex Benth., Lamiaceae
Andrade, Alexandre M.;Oliveira, Juliana P. R.;Santos, André L. L. M.;Franco, Clóvis R. P.;Antoniolli, ?ngelo R.;Estevam, Charles S.;Thomazzi, Sara M.;
Revista Brasileira de Farmacognosia , 2010, DOI: 10.1590/S0102-695X2010005000034
Abstract: various species of hyptis are used in folk medicine as anti-inflammatory. in order to evaluate the actions of hyptis fruticosa salzm. ex benth., lamiaceae, studies were performed on anti-inflammatory and antioxidant activities. the ethanol extract (ee) of h. fruticosa leaves and its n-ch, chcl, etoac, and meoh/ho partitions were used in the following experiments. oral treatment with the ee of h. fruticosa leaves (100, 200, and 400 mg/kg) or its n-c6h14, etoac, and meoh/h2o partitions (50, 100, and 200 mg/kg) elicited inhibitory activity (p<0.05) on carrageenan-induced oedema formation and leukocyte migration into the peritoneal cavity in rats. however, the chcl3 partition did not show any inhibitory effect on paw oedema and peritonitis experimental models. the ee and etoac partition present highest antioxidant potential (ic50 = 35.00±1.01 and 36.67±2.65 μg/ml dpph, respectively), similar to the reference compound (ic50 = 16.67±1.21 μg/ml). in conclusion, h. fruticosa shows anti-inflammatory and antioxidant activities.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.