Search results for "Montana"
showing 10 items of 43 documents
Reproductive isolation among allopatric Drosophila montana populations
2014
An outstanding goal in speciation research is to trace the mode and tempo of the evolution of barriers to gene flow. Such research benefits from studying incipient speciation, in which speciation between populations has not yet occurred, but where multiple potential mechanisms of reproductive isolation (RI: i.e., premating, postmating-prezygotic (PMPZ), and postzygotic barriers) may act. We used such a system to investigate these barriers among allopatric populations of Drosophila montana. In all heteropopulation crosses we found premating (sexual) isolation, which was either symmetric or asymmetric depending on the population pair compared. Postmating isolation was particularly strong in c…
The genetic architecture of sexually selected traits in two natural populations of Drosophila montana
2015
The work was supported by the National Environment Research Council (grant NE/E015255/1 to MGR and RKB) and the Academy of Finland (project 132619 to AH). We investigated the genetic architecture of courtship song and cuticular hydrocarbon traits in two phygenetically distinct populations of Drosophila montana. To study natural variation in these two important traits, we analysed within-population crosses among individuals sampled from the wild. Hence, the genetic variation analysed should represent that available for natural and sexual selection to act upon. In contrast to previous between-population crosses in this species, no major quantitative trait loci (QTLs) were detected, perhaps be…
Effects of photoperiodically induced reproductive diapause and cold hardening on the cold tolerance of Drosophila montana
2010
Coping with seasonal and daily variation in environmental conditions requires that organisms are able to adjust their reproduction and stress tolerance according to environmental conditions. Females of Drosophila montana populations have adapted to survive over the dark and cold winters at high latitudes and altitudes by spending this season in photoperiodically controlled reproductive diapause and reproducing only in spring/summer. The present study showed that flies of a northern population of this species are quite tolerant of low temperatures and show high seasonal and short-term plasticity in this trait. Culturing the flies in short day length (nearly all females in reproductive diapau…
Effects of the serjania erecta and zeyheria montana ethanol extracts in experimental pulpitis in rats: A histological study
2012
Objectives: The aim of this study was to evaluate, by the semi-quantitative histological analysis, the anti-inflammatory activity of the ethanolic extracts of Serjania erecta e Zeyheria Montana, in experimental pulpits in rats. Study Design: In order to induce pulp inflammation, cavities were performed on the occlusal surface of the mandibular first molars of 45 male rats, without pulp exposure. The animals were distributed into 4 groups: GI, teeth without cavities; GII, single dose of saline solution via intraperitoneal (IP); GIII, single dose (IP) of 300mg/Kg of ethanolic extract of Zeyheria montana; GIV, single dose (IP) of 300mg/Kg of ethanolic extract of Serjania erecta. After 6, 12 an…
Spatial and Temporal Patterns in the Evolution of the Flora of the European Alpine System
2003
This paper presents a perspective of how phylogenetic and phylogeographic hypotheses, based on nuclear DNA sequence variation (ITS) or amplified fragment length polymorphisms (AFLPs), can provide insights into the origin and evolution of the European high mountain flora. We focus on a diversity of unrelated herbaceous plant taxa that are broadly co-distributed across the European Alpine System, representing different taxonomic levels, and having either Mediterranean or Asian affinities (i.e., Anthyllis montana, Pritzelago alpina, Globularia vs. Soldanella, and Primula sect. Auricula). Our observations highlight that all taxa investigated began to diversify at the beginning of the Pleistocen…
Prehistoric Settlement and Population in the Madonie Mountains. New Data from the Archaeological Survey
2010
The aim of the Madonie research project is to analyse mobility strategies and the use of a mountainous territory by relating geomorphologic features, raw material sources and landscape to the prehistoric settlement. For this purpose we planned an intensive and systematic survey of sample areas, selected on geo-morphological, altimetric and archaeological criteria, correlated to a palaeoenvironmental investigation based on the study of palynological sequence samples coming from wet areas of the Madonie territory and from archaeological deposits. Le projet de recherche sur la Madonie analyse les stratégies de mobilité et l’exploitation du territoire de montagne, en reliant les caractéristique…
A rediscovered sign of the medieval identity in the ancient town of Palermo: a tower house in the Kalsa and its historical stratifications
2020
A building supposedly belonged to the House of Chiaramonte (or Chiaromonte) in Sicily was kept for several centuries inside the volume of a larger building in the Kalsa district of Islamic foundation, in Palermo. The sudden detachment of the plaster and some stone elements at the beginning of the 80s of the 20th century made it possible to identify the traces of the façade of a fourteenth-century tower-house, characterized by a series of four windows with pointed arched elements and archivolts with rings of broken sticks, surmounted by a weft of interwoven bands of two-tone stone elements. The contribution retraces the study activities to identify the architectural cultures that coexist in …
Traditional Architecture and seismic security. Earthquake in the Madonie inner mountain area of Sicily: damages and construction techniques
2017
Tra il 1818 e il 1819 una serie di centri siciliani concentrati nell'area montuosa delle Madonie, furono colpiti a più riprese da una sequenza di scosse sismiche che provocarono numerosi danni all’edificato storico, sia diffuso che di pregio. Il contributo intende indagare i danni e le conseguenti ricostruzioni, con particolare riferimento alle tipologie edilizie e alle tecniche costruttive adottate prima e dopo il sisma. L'azione di verifica e monitoraggio delle condizioni delle fabbriche e i conseguenti interventi di consolidamento e riparazione sono efficacemente documentati in testi a stampa e nei report coevi al sisma e –soprattutto- da una copiosa documentazione archivistica. Si ident…
Tipificación de Inula montana L. (Asteraceae)
2014
Ferrer-Gallego, P., E. Laguna, R. Rosello, J. Gomez & J. B. Peris (2014). Typification of Inula montana L. (Asteraceae). Candollea 69: 5–8. In Spanish, English and French abstracts.The name Inula montana L. (Asteraceae) is lecto- and epitypified. The designated lectotype corresponds to an icon from Robert Morison published in 1699 and the epitype to a plant specimen collected by Morison and conserved at OXF (Morisonian Herbarium).
Phytochemical Evaluation of Tinctures and Essential Oil Obtained from Satureja montana Herb
2020
Winter Savory (Satureja montana L.) has been used in traditional medicine and as a spice or natural food preservative in the Mediterranean region for centuries. In this paper, some technological and analytical aspects of the S. montana tinctures development and an evaluation of the essential oil composition are provided. The total phenolic and flavonoid contents and phenolic compounds profile analyzed spectrophotometrically and by high-performance thin-layer chromatography (HPTLC), respectively, were evaluated in the developed tinctures. The results showed that the tinctures prepared from the S. montana herb by maceration or remaceration are rich in polyphenols, and there is an influence of…