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Search Results: 1 - 10 of 8299 matches for " Teresa Garnatje "
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Plant Ethnoveterinary Practices in Two Pyrenean Territories of Catalonia (Iberian Peninsula) and in Two Areas of the Balearic Islands and Comparison with Ethnobotanical Uses in Human Medicine
Esperan a Carrió,Montse Rigat,Teresa Garnatje,Marina Mayans,Montse Parada,Joan Vallès
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/896295
Abstract: This paper presents the results of an ethnobotanical study centred in veterinarian uses in two Catalan Pyrenean regions (Alt Empordà -AE- and High River Ter Valley -AT-, Iberian peninsula) and two Balearic Islands areas (Formentera -FO- and northeastern Mallorca -MA-). In the areas studied, 97 plant species have been claimed to be useful for veterinary purposes. A total of 306 veterinary use reports have been gathered and analysed. The ten most reported plants are Tanacetum parthenium (24 use reports), Parietaria officinalis (15), Ranunculus parnassifolius (14), Meum athamanticum (13), Olea europaea (13), Quercus ilex (12), Ruta chalepensis (12), Sambucus nigra (10) and Thymus vulgaris (10). According to comprehensive reviews, a high number of novelties for plant ethnoveterinary are contributed: 34 species and one subspecies, 11 genera, and three families have not been reported in previous works in this field, and 21 species had only been mentioned once. Several ethnoveterinary uses are coincidental with those in human medicine. Although ethnoveterinary practices are less relevant than in the past in the territories considered, as in all industrialised countries, the knowledge on plant properties and applications is still rich and constitutes a large pool of evidence for phytotherapy, both in domestic animals and humans.
Genome Size Study in the Valerianaceae: First Results and New Hypotheses
Oriane Hidalgo,Jo?l Mathez,Sònia Garcia,Teresa Garnatje,Jaume Pellicer,Joan Vallès
Journal of Botany , 2010, DOI: 10.1155/2010/797246
Abstract: The purpose of this study is to provide a new focus to contribute, from the perspective of genomic evolution, towards a better understanding of the Valerianaceae evolutionary history. Chromosome numbers were determined by Feulgen staining in 24 populations of 18 species (first count for Valerianella multidentata, –16), and DNA contents were assessed by flow cytometry in 74 populations of 35 species (first assessments in all taxa but Centranthus ruber). A molecular phylogeny based on the trnL-trnF and including 41 new sequences was established, with the first DNA sequence for Centranthus nevadensis, Valeriana rotundifolia, V. saxatilis, Valerianella multidentata, and V. turgida. This work is the first large genome size study devoted to the Valerianaceae, showing a range of DNA amounts from ?pg (Valerianella turgida) to ?pg (Valeriana officinalis). At the family level, changes in basic chromosome number and genome size coincide with or precede major shifts in the evolutionary history of the group, such as those concerning stamen number and floral symmetry. 1. Introduction The family Valerianaceae (currently considered within the Caprifoliaceae s.l.; [1]) comprises ca. 400 species of which approximately 200 are included in Valeriana L., the biggest genus of the order Dipsacales. The Valerianaceae are cosmopolitan in their natural distribution, with the exceptions of Australia and the Pacific islands, where they were introduced, and can be nowadays considered as naturalized. Several of their representatives have economic interest as medicinal (e.g., V. officinalis L.), edible (e.g., Valerianella Mill., corn salad or lamb’s lettuce), or ornamental plants (e.g., Centranthus DC.). The family always roused important scientific interest, and its study has broadly benefited from the new molecular techniques, especially the phylogenetic reconstructions. Recent phylogenies based on DNA sequencing [2–7] have considerably modified the traditional classification of the family [8–12]. Molecular results recognize only six genera: Centranthus, Fedia Gaertn., Nardostachys DC., Patrinia Juss., Valeriana (including Aretiastrum DC., Astrephia Dufr., Belonanthus Graebn., Phyllactis Pers., Porteria Hook., and Stangea Graebn.), and Valerianella. Plectritis (Lindl.) DC. is nested amongst South American Valeriana [5, 6]. Moreover, Bell [7] suggested a possible further taxonomic treatment of the family considering Fedia as a synonym of Valerianella. New genera may also be described for some of the Valeriana species that do not group with their congenerics in the phylogenetic
Cheirolophus intybaceus (Asteraceae, Centaureinae) or the constancy of 2C value
Garnatje, T.,Garcia, S.,Hidalgo, O.,Pellicer, J.
Collectanea Botanica , 2009,
Abstract: Cheirolophus intybaceus (Asteraceae, Centaureinae) or the constancy of 2C value.- Cheirolophus intybaceus is a heliophyte growing in thermal Mediterranean scrublands along a coastal belt of 50 km large, stretching from Toulon (France) to the Southern part of the Iberian Peninsula, occurring also in the Balearic Islands (with the exception of Minorca). Moreover, this species is also growing in high and sunny lands in the Mediterranean river basins, constituting a complex of taxa closely related among them. The objectives of this work are: i) to provide new genome size data for some Asteraceae species; ii) to study the variation of DNA amount along a species distribution area; iii) to evaluate the discrimination capability of this parameter at low taxonomic levels. A signicantly positive correlation between the DNA amount and the latitude has been found, that is, in drier and warmer habitats genome size tends to decrease in this species. The variation in the whole distribution area of Ch. intybaceus is 1.15-fold. This low variability supports the constancy of 2C-value. Cheirolophus intybaceus es una especie heliófila propia de los matorrales mediterráneos termófilos que crece en una franja litoral de unos 50 km de anchura que va desde Tolón (Var, Francia) hasta el sur de la península Ibérica, estando también presente en las islas Baleares (excepto en Menorca). Se encuentra también en las zonas elevadas y soleadas de las cuencas fluviales mediterráneas, formando un complejo de táxones estrechamente relacionados entre sí. Los objetivos de este trabajo son: i) contribuir a la aportación de datos de tama o del genoma para diversas especies de Asteraceae; ii) estudiar la variación de la cantidad de ADN a lo largo del área de distribución de una especie; iii) evaluar la capacidad de discriminación de este parámetro a niveles taxonómicos bajos. Se ha encontrado una correlación positiva y significativa entre la cantidad de ADN y la latitud, es decir, que en hábitats con menor pluviosidad y más cálidos el tama o del genoma tiende a disminuir en esta especie. La variación en todo el área de distribución de Ch. intybaceus es de 1,15 veces. Nos encontramos, por lo tanto, ante un caso de baja variabilidad que apoya la constancia del valor 2C.
Molecular cytogenetic characterization of some representatives of the subgenera Artemisia and Absinthium (genus Artemisia, Asteraceae)
Pellicer, J.,Garcia, S.,Garnatje, T.,Hidalgo, O.
Collectanea Botanica , 2008,
Abstract: A molecular cytogenetic study has been performed in three species of the genus Artemisia, complementing previous works on two subgenera that had been scarcely studied from this standpoint, Artemisia ( A. chamaemelifolia, A. vulgaris) and Absinthium ( A. absinthium). Chromomycin A3 and 4',6-diamidino-2-phenylindole (DAPI) banding have been carried out, as well as fluorescent in situ hybridization (FISH) of 5S and 18S-5.8S-26S ribosomal DNA. Morphometrical data of karyotype characters were calculated and idiograms with the position of the AT- and GC-rich regions as well as rDNA loci were constructed. Colocalization of most of these regions has been observed, confirming previous findings in this genus. Both ribosomal DNA appear always colocalized, which is a distinct feature with respect to most angiosperms surveyed. Regarding the differential characteristics of each species, a symmetrical karyotype has been found in the species studied. Artemisia absinthium shows long chromosomes and absence of centromeric banding signals that, conversely, are absent in A. vulgaris andA. chamaemelifolia. The last species also presents B-chromosomes in which ribosomal DNA and heterochromatin have been detected. Despite these differences, karyotype morphology and signal pattern of the three species are quite coincidental. This might reflect a close phylogenetic relationship between both subgenera, which is consistent with the available molecular phylogenies presenting species of the subgenera Artemisia and Absinthium intermixed. Se ha llevado a cabo un estudio citogenético molecular en tres especies del género Artemisia, que complementa trabajos previos sobre dos subgéneros que han sido poco estudiados desde este punto de vista, Artemisia (A. chamaemelifolia, A. vulgaris) y Absinthium (A. absinthium). Se han efectuado tinciones de bandeo con cromomicina A3 y con 4',6-diamidino-2-fenilindol (DAPI), así como hibridación in situ fluorescente (FISH) del ADN ribosómico 5S y 18S-5.8S-26S. Se han calculado los datos morfométricos relativos a los caracteres del cariotipo y se han construido los idiogramas con indicación de la posición de las regiones ricas en AT y GC y los loci del ADNr. Se ha observado la colocalización de la mayoría de estas regiones; tal como se había mencionado en otros estudios sorbe el género, ambos ADN ribosómicos aparecen siempre colocalizados, lo que constituye un rasgo distintivo con respecto de la mayor parte de angiospermas. En cuanto a las características diferenciales de cada especie, A. absinthium muestra cromosomas largos, un cariotipo simétrico y c
Generic boundaries and evolution of characters in the Arctium group: a nuclear and chloroplast DNA analysis
Susanna, A.,Garcia-Jacas, N.,Vilatersana, R.,Garnatje, T.
Collectanea Botanica , 2003,
Abstract: Generic delineation within the Arctium group (Compositae, Carduceae-Carduinae), formed by the genera Arctium, Cousinia, Hypacanthium and Schamalhausenia, has proven a complicated task. In particular, the precise limits between Arctium and Cousinia are very difficult to establish. Therefore, we have carried out a molecular survey of DNA sequences of two regions, the chloroplast gene matK and the nuclear-ribosomal spacers ITS 1 and 2, of a representation of all the genera of the group (in the case of Cousinia, centered in the species more obviously related to Arctiium). Our results show a precise correlation between molecular phylogeny and two very important characters, pollen type and chromosome numbers: all the investigated species with the Arctiastrum pollen type and x= 18, characteristics of Arctium sensu stricto, form a monophyletic clade, sister of another monophyletic clade formed by all the investigated species of Cousinia sensu slricto. However, the resulting "Arctioid" clade cannot be defined on macroscopic morphologic characters, because the main trait for segregating Arctium and Cousinia, the spiny pinnatifid-pinnatisect leaves of Cousinia, is adaptative and of scarce systematic relevance. In fact, our results suggest that spines have appeared at least in two different lineages: the genera Hypacanthium and Schamalhausenia, spiny and thus morphologically closer to Cousinia, are unambiguously related to the unarmed genus Arctium. An hypothesis on the evolution of morphology, pollen and chromosome numbers in the group is formulated. The systematic implications of this incongruence between molecular, pollen and karyology, on the one hand, and morphology, on the other hand, are evaluated. Some possible solutions are proposed, but none of them is totally satisfactory: more studies are necessary with the inclusion of new species of Cousinia subg. Hypacanthodes. Definir los límites genéricos en el grupo Arctium (Compositae, Carduceae-Carduinae), formado por los géneros Arctium, Cousinia, Hypacanthium y Schamalhausenia, ha resultado ser una tarea muy complicada. Concretamente, la separación precisa de Arctium y Cousinia es muy difícil de establecer. En consecuencia, hemos analizado las secuencias del DNA de dos regiones, el gen cloroplástico matK y los espaciadores ITS 1 y 2 del DNA ribosómico-nuclear de una amplia representación de todos los géneros del grupo: en el caso de Cousinia, centrándonos en las especies más obviamente relacionadas con Arctiium, hemos encontrado una correlación exacta entre filogenia molecular y dos caracteres fundamentales, el
First genome size estimations for some eudicot families and genera
Garcia, S.,Garnatje, T.,Hidalgo, O.,Mas De Xaxars, G.
Collectanea Botanica , 2010,
Abstract: Genome size diversity in angiosperms varies roughly 2400-fold, although approximately 45% of angiosperm families lack a single genome size estimation, and therefore, this range could be enlarged. To contribute completing family and genera representation, DNA C-Values are here provided for 19 species from 16 eudicot families, including first values for 6 families, 14 genera and 17 species. The sample of species studied is very diverse, including herbs, weeds, vines, shrubs and trees. Data are discussed regarding previous genome size estimates of closely related species or genera, if any, their chromosome number, growth form or invasive behaviour. The present research contributes approximately 1.5% new values for previously unreported angiosperm families, being the current coverage around 55% of angiosperm families, according to the Plant DNA C-Values Database. La diversidad del tama o del genoma en angiospermas es muy amplia, siendo el valor más elevado aproximadamente unas 2400 veces superior al más peque o. Sin embargo, cerca del 45% de las familias no presentan ni una sola estimación, por lo que el rango real podría ser ampliado. Para contribuir a completar la representación de familias y géneros de angiospermas, este estudio contribuye con valores C para 19 especies de 16 familias de eudicoticotiledóneas, incluyendo los primeros valores para 6 familias, 14 géneros y 17 especies. La muestra estudiada es muy diversa, e incluye hierbas, malezas, enredaderas, arbustos y árboles. Se discuten los resultados en función de estimaciones previas del tama o del genoma de especies o géneros estrechamente relacionados, del número de cromosomas, la forma de crecimiento o el comportamiento invasor de las especies analizadas. El presente estudio contribuye aproximadamente en un 1,5% de nuevos valores para familias de angiospermas no estudiadas previamente, de las que actualmente existe información para el 55%, según la base de datos de valores C en plantas.
Greedy Friensdhip Decompositions of Graphs  [PDF]
Teresa Sousa
Open Journal of Discrete Mathematics (OJDM) , 2011, DOI: 10.4236/ojdm.2011.11004
Abstract: A graph that consists of t cliques sharing a vertex v is said to be a t-friendship graph with center v. A friendship graph is a graph that is t-friendship for some . We solve the problem of finding the best upper bound for the size of a greedy 2-friendship decomposition and a greedy friendship decomposition of graphs of order n.
The H-Decomposition Problem for Graphs  [PDF]
Teresa Sousa
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.311237
Abstract: The concept of H-decompositions of graphs was first introduced by Erd?s, Goodman and Pósa in 1966, who were motivated by the problem of representing graphs by set intersections. Given graphs G and H, an H-decomposition of G is a partition of the edge set of G such that each part is either a single edge or forms a graph isomorphic to H. Let Ф(n,H) be the smallest number Ф, such that, any graph of order n admits an H-decomposition with at most Ф parts. The exact computation of Ф(n,H) for an arbitrary H is still an open problem. Recently, a few papers have been published about this problem. In this survey we will bring together all the results about H-decompositions. We will also introduce two new related problems, namely Weighted H-Decompositions of graphs and Monochromatic H-Decom- positions of graphs.
4-Cycle Decompositions of Graphs  [PDF]
Teresa Sousa
Open Journal of Discrete Mathematics (OJDM) , 2012, DOI: 10.4236/ojdm.2012.24024
Abstract: In this paper we consider the problem of finding the smallest number such that any graph G of order n admits a decomposition into edge disjoint copies of C4 and single edges with at most elements. We solve this problem for n sufficiently large.
Friendship Decompositions of Graphs: The general problem  [PDF]
Teresa Sousa
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24B008
Abstract: A friendship graph is a graph consisting of cliques sharing a common vertex. In this paper we investigate the maximum number of elements in an optimal friendship decomposition of graphs of order n. We obtain upper and lower bounds for this number. These bounds relate this problem with the classical Ramsey numbers.
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