Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Adicionar filtros








Intervalo de ano
1.
Rev. bras. farmacogn ; 21(5): 850-855, Sept.-Oct. 2011. ilus, tab
Artigo em Inglês | LILACS | ID: lil-600965

RESUMO

The essential oil of the species Clinopodium nubigenum (Kunth) Kuntze, Lamiaceae, was analyzed by GC-MS and GC-FID, taking into account the more recent literature. Among the seventy compounds identified, the majority are oxygenated monoterpenoids. The essential oil, tested for antimicrobial activity, resulted effective in vitro against Candida albicans. From the aqueous MeOH extract of the aerial parts of the plant two nonvolatile compounds, named schizonepetoside A and schizonepedoside C, have been isolated. They are rare glycosyl terpenoids, which were previously isolated from only one plant, but never found before in the genus Clinopodium.

2.
Bol. micol ; 22: 47-50, dic. 2007. tab
Artigo em Inglês | LILACS | ID: lil-598288

RESUMO

Prior to make a new cobweb, the Araneus diadematus Clerck cross spider eats its old web regulary everyday. In this paper we issue a quantitative and qualitative analysis of pollen grains and fungal spores present in the cob web, which might contribute to the diet of this arachnide. Cob webs were collected at the Natural Park of Ticino (Pavia, northern Italy). Fungal spores and pollen grains were taxonomically counted and identified for each sample. Quantitative analysis showed that both spores and pollen present in the cob webs exhibited some seasonal variation as regards quantity, whereas the qualitative analysis revealed that spores and pollen grains belong to 14 and 7 taxa, respectively. Alternaria, Cladosporium, Fusarum were the most frequent fungal taxa while Urticaceae, Betulaceae and Poaceae became the most representative plant families. About 5700 fungal spores and 2000 pollen grains were found to be present in the cob web of this spider everyday. Based on this information, it is possible to think that the aeroplancton stuck to the cob web can become a nutritional additive for the diet of this arachnide.


Antes de fabricar su telaraña, la araña del jardín Araneus diadematus Clerck, regularmente, cada día se come la antigua. En este estudio aportamos un análisis cuantitativo y cualitativo de los granos de polen y Esporas fúngicas retenidas en la telaraña, los cuales podrían contribuir a la dieta de este arácnido. Las telarañas fueron colectadas en el Parque Natural del Ticino (Pavia, N. Italia). Para cada muestra, las esporas fúngicas y los granos de polen fueron contabilizados e identificados taxonómicamente. El análisis cuantitativo mostró que las esporas y el polen retenidos en las telarañas presentaron variación estacional en cantidad, mientras con el análisis cualitativo se determinó que las esporas y los granos de polen pertenecen a 14 y 7 taxa respectivamente. Alternaria, Cladosporium, Fusarium fueron los taxa fúngicos más frecuentes, mientras Urticaceae, Betulaceae y Poaceae fueron las familias de plantas más representadas. Se determinó que aproximadamente unas 5700 esporas fúngicas y 2000 granos de polen fueron retenidos en la tela de esta araña cada día. Con estos antecedentes, se puede pensar que el aeroplanctón adherido a la telaraña puede constituir una aporte nutritivo en la dieta de este arácnido.


Assuntos
Animais , Áreas Verdes/análise , Esporos Fúngicos/isolamento & purificação , Esporos Fúngicos/classificação , Aditivos Alimentares , Pólen/classificação , Aranhas , Argentina
3.
Bol. micol ; 20: 91-95, dic. 2005. tab, graf
Artigo em Inglês | LILACS | ID: lil-476861

RESUMO

A preliminary qualitative analysis was carried out on fungal composition of leaf litter of Salix herbacea growing on Gran Sasso, Monti della Laga (TE), the highest mountain of the Apennines. Direct isolation in humid chamber and culture of soil on plates were used as methods. The most isolated genera were Acremonium, Cladosporium, Lecanicillium, Mucor, Penicillium and Pestalotia. Lag period and radial growth of the colonies were recorded at different temperatures from -1 to 45ºC. and the optimal temperature for growth and sporulation was detected for each isolate. Most of the isolated strains were psychrotolerant mesophyle and capable to grow within a 1ºC to +30ºC range, except for a thermotolerant strain of Penicillium that could grow at 45ºC .They exhibited a wide range of thermal tolerance together with their ability to grow in habitats which are commonly submitted to great changes in temperature similar to those occurring in alpine climate. Data presented in this paper can be useful to understand the ecological requirements of the fungal components of high mountain ecosystems that are often subject to monitoring in the investigation of the effects of global climatic changes.


Se realizó un análisis cualitativo de la composición fúngica de hojas de la litera de Salix herbacea que crece en Gran Sasso, Monti della Laga(TE), en la altamontaña de los Apeninos. El método utilizado fue el aislamiento directo en cámara humeda y el cultivo del sueloen placas. Los géneros más aislados fueron: Acremonium, Cladosporium, Lecanicillium, Mucor, Penicillium yPestalotia. Se registró la fase lag y el crecimiento radial de las colonias a diferentes temperaturas, desde-1 hasta45°C y se detectó la temperatura óptima de crecimiento y esporulación para cada aislado. La mayoría de las cepas aisladas fueron mesó.las sicrotolerantes y capaces de crecer en un rango de 1°C a +30°C, excepto una cepa de termotolerante de Penicillium que pudo crecer hasta 45°C. Ellas presentaron un amplio rango de tolerancia térmica, destacandose su especialidad para crecer en los hábitats caracterizados por altos cambios de temperatura semejante a los del clima alpino. Los datos presentados en este trabajo pueden ser usados para entender los requerimientosecológicos de los componentes fúngicos de los ecosistemas de alta montaña sujetos a monitoreo en las investigaciones de los efectos del cambio climático global.


Assuntos
Acremonium , Cladosporium , Fungos/isolamento & purificação , Fungos/classificação , Fungos/crescimento & desenvolvimento , Mucor , Penicillium , Salix/microbiologia , Temperatura , Mudança Climática , Itália , Clima
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA