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Directory of Open Access Journals Sweden. Sesquiterpene lactones of the plants Viguiera sylvatica and Decachaeta thieleana Asteraceae modulate nitric oxide production and phagocytosis of macrophages cell line RAW. Different species of the Asteraceae family are a potential source of sesquiterpene lactones with anti-inflammatory properties.

Macrophages play a central role in the regulation of immune responses. In the present study, the in vitro effect of two sesquiterpene. Isolation and structural elucidation of secondary metabolites of plants of the families asteraceae and urticaceae.

A phytochemistry study of plant's species of the Asteraceae and Urticaceae family is proposed in order to isolate and to elucidate the structure of active principles; due to the fact that several studies have found that some of these families have compounds with anti-inflammatory activity, mainly lactonas sesquiterpenicas. The phytochemistry study was carried out through the application of chromatography techniques, for the separation and purification of the compounds.

Includes chromatography of column, fine and liquid layer of high resolution. On the other hand, spectroscopic techniques were used for the elucidation, mainly of nuclear magnetic resonance RMN as much of one as of two dimensions. In this way, it was possible to isolate 14 compounds in Decachaeta thieleana and 10 in Phenax mexicanus, from which 6 correspond compounds of innovative structure. The comparison of the results obtained in Decachaeta thieleana with previous studies evidences that specimens, orphologically identical the same species, but different locations , possess totally different compounds.

This suggests that the studied specimens do not correspond to the same species. However, the determination of such a cause not only evade the objectives of this work but also the area of study of Chemistry [es. Nueva benzoil lactona y otros costituyentes de pilocarpus alvaradoii rutaceae.

From th Atractylosides in Callilepis laureola Asteraceae. In addition to the previously reported atractyloside, three more kaurenoid glucosides have been found in the root-stock of Callilepis laureola. These are carboxyatractyloside and the 6'-isovaleryl esters of atractyloside and carboxyatractyloside. To our knowledge, this is the first report of the two 6'-isovalerates.

The betta -glucosidic nature of these poisonous Asteraceae atractylosides has been confirmed by 1 H and 13 C n. O enecarbamato quiral de 5 membros foi preparado a partir da L-prolina.

Full Text Available The present work describes the wood anatomy of Heterothalamus alienus and Heterothalamus rupestris Astereae - Asteraceae , as part of the secondary xylem study in the named genus. For the two species it was recorded some features usually mentioned in the literature for the Asteraceae , as typically small vessels, grouped in a dendritic pattern, the presence of only simple perforation plates and of paratracheal parenchyma.

Heterothalamus alienus shows spiral thickenings in the wood vessels and storied vasicentric axial parenchyma. Heterothalamus rupestris differs itself by the absence of spiral thickenings in wood vessels and by no storied axial parenchyma, in paratracheal vasicentric to unilateral patterns.

Photomicrographs, quantitative data of anatomical features and a comparison between the two species of wood are also provided. Taxonomic notes on Asteraceae. A new variety for Grindelia anethifolia is described, and the known area of Bidens andicola, Grindelia coronensis and Proustia cuneifolia var. Phytotoxic Potential of Onopordum acanthium L.

Onopordum acanthium L. Asteraceae is a plant native to southern Europe and southwestern Asia, but it is invasive in disturbed areas and agricultural fields around the world, causing many agronomic problems by interfering with crops or preventing animals from grazing on pastures. Allelopathy could be one of the reasons that this plant has spread over different continents. The aim of the present study was to bioprospect O.

The samples were herborized and identified by using a specialized bibliography and comparison with the species available in the Herbarium ESAL of the Federal University of Lavras. The utilization review was carried out by means of bibliographical research and ethnobotanical surveys in the sampling area. Specific reagents for each group of compounds were used for phytochemical screening.

From the Asteraceae species investigated, 32 were reported to be of use to. Evolutionary origin of the Asteraceae capitulum: Insights from Calyceraceae. The early development and structure of the inflorescence of eight species five genera of Calyceraceae were studied by SEM, and patterns of evolutionary change were interpreted via phylogenetic character mapping.

Optimization of inflorescence characters on a DNA sequence-derived tree suggests that the Asteraceae capitulum derives from a simple cephalioid through two morphological changes: loss of the terminal flower and suppression of the cymose branching pattern in the peripheral branches.

Widely understood as a condensed raceme, the Asteraceae capitulum is the evolutionary result of a very reduced, condensed thyrsoid.

We also discuss possible remnants of the ancestral cephalioid structure in some Asteraceae. The complete chloroplast genome sequence of Aster spathulifolius Asteraceae ; genomic features and relationship with Asteraceae. Aster spathulifolius, a member of the Asteraceae family, is distributed along the coast of Japan and Korea. This plant is used for medicinal and ornamental purposes.

The complete chloroplast cp genome of A. Furthermore, evaluation of the gene compositions of J. Comparison of the synonymous Ks and nonsynonymous Ka substitution rates with J. These findings revealed that substitution has occurred at similar rates in most genes, and the substitution rates suggested that most genes is a purified selection. All rights reserved. The origin of the bifurcating style in Asteraceae Compositae.

The plant family Asteraceae Compositae exhibits remarkable morphological variation in the styles of its members. Lack of studies on the styles of the sister families to Asteraceae , Goodeniaceae and Calyceraceae, obscures our understanding of the origin and evolution of this reproductive feature in these groups. The aim of this work was to perform a comparative study of style morphology and to discuss the relevance of important features in the evolution of Asteraceae and its sister families.

The histochemistry, venation and general morphology of the styles of members of Goodeniaceae, Calyceraceae and early branching lineages of Asteraceae were analysed and put in a phylogenetic framework to discuss the relevance of style features in the evolution of these families. The location of lipophilic substances allowed differentiation of receptive from non-receptive style papillae, and the style venation in Goodeniaceae and Calyceraceae proved to be distinctive.

There were several stages of style evolution from Goodeniaceae to Asteraceae involving connation and elongation of veins, development of bilobation from an initially cup-shaped style, and a redistribution of the receptive and non-receptive papillae. These developments resulted in bifurcation in the styles of Asteraceae , with each branch face having a different function, and it is suggested here as a mechanism that promoted outcrossing, which in turn led to the great diversification in the family.

For Permissions, please email: journals. Specialist bees collect Asteraceae pollen by distinctive abdominal drumming Osmia or tapping Melissodes, Svastra. Four species of western US Osmia Cephalosmia bees that are Asteraceae specialists oligoleges were observed to employ a heretofore unappreciated, stereotypical means of collecting pollen, abdominal drumming, to gather pollen from 19 flowering species representing nine tribes of Asteraceae.

Many specialist herbivores eat foods that are apparently low quality. The compensatory benefits of a poor diet may include protection from natural enemies. Several bee lineages specialize on pollen of the plant family Asteraceae , which is known to be a poor-quality food.

Here we tested the hypothesis that specialization on Asteraceae pollen protects bees from parasitism. We compared rates of brood parasitism by Sapyga wasps on Asteraceae -specialist, Fabeae-specialist, and other species of Osmia bees in the field over several years and sites and found that Asteraceae -specialist species were parasitized significantly less frequently than other species. We then tested the effect of Asteraceae pollen on parasites by raising Sapyga larvae on three pollen mixtures: Asteraceae , Fabeae, and generalist a mix of primarily non- Asteraceae pollens.

Survival of parasite larvae was significantly reduced on Asteraceae provisions. Our results suggest that specialization on low-quality pollen may evolve because it helps protect bees from natural enemies. Phytotoxic potential of Onopordum acanthium L.

Phytotoxic activity was tested using etiolated wheat coleoptiles. All compounds were isolated for the first time from O. Compound 3 strongly inhibited the growth of wheat coleoptiles and 1 showed an intermediate effect.

The results indicate that these compounds could contribute to the invasion of O. Warionia Asteraceae : a relict genus of Cichorieae? This is a somewhat thistle-like aromatic plant, with white latex, and fleshy, pinnately- partite leaves. Warionia is in many respects so different from any other genus of Asteraceae , that it has been tentatively placed in the tribes Cardueae, Cichorieae, Gundelieae, and Mutisieae.

Until now, a comprehensive study of Warionia to have a complete context for discussing its taxonomic position is lacking. The general morphology, anatomy, palynology and chromosome number of W. Laticifers in leaves and stems indicate a relationship with Cichorieae, and are associated with the phloem, in contact with it or with the surrounding sclerenchyma sheath.

The pollen features indicate a strong relation with Cardueae, namely the structure with Anthemoid pattern where the columellae are joined to the foot layer, the ectosexine with thin columellae, the endosexine with stout and ramified columellae, the conspicuous spines with globose bases and conspicuous apical channels, and the tectum surface very perforate.

The morphological and palynological evidence positions Warionia between the tribes Cardueae and Cichorieae suggesting that it could be a remnant of the ancestral stock that gave rise to both tribes.

Structural studies of chemical constituents of Thithonia Tagetiflora Desv Asteraceae. Tithonia tagetiflora Desv. Asteraceae is a widespread plant in Vietnam, and the species of Tithonia are known as plants containing many biologically active compounds.

However, T. Therefore, we now report the structural elucidation of tw Pharmacognostical study of achenes of some plants from Asteraceae family.

Full Text Available In the present paper are represented morphological studies on determination of weight of achenes, and sieve analysis of fruits of some plants from Asteraceae family Arctium lappa L. C, Inula helenium L.

Lipid, alcohol-soluble and water-soluble complexes in fruits of C. Cytogeography and chromosome evolution of subgenus Tridentatae of Artemisia Asteraceae.

The subgenus Tridentatae of Artemisia Asteraceae : Anthemideae is composed of 11 species of various taxonomic and geographic complexities. It is centered on Artemisia tridentata with its three widespread common subspecies and two more geographically confined ones. Meiotic chromosome counts on pollen mother cells Helichrysum yurterianum Y. Gemici, Kit Tan, H. Gemici Asteraceae , Inuleae is described and illustrated.


Fagosoma Migración y velocidad medida en vivo primaria macrófagos humanos infectados con VIH-1

Directory of Open Access Journals Sweden. Sesquiterpene lactones of the plants Viguiera sylvatica and Decachaeta thieleana Asteraceae modulate nitric oxide production and phagocytosis of macrophages cell line RAW. Different species of the Asteraceae family are a potential source of sesquiterpene lactones with anti-inflammatory properties. Macrophages play a central role in the regulation of immune responses.


Professor David Williams, BDS (Hons), MSc, PhD, FRCPath, FDS RCS (Engl)

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