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Pesquisa : B01.650.940.800.575.912.250.312.099 [Categoria DeCS]
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  1 / 159 MEDLINE  
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[PMID]:28742230
[Au] Autor:Maguilla E; Escudero M; Hipp AL; Luceño M
[Ad] Endereço:Universidad Pablo de Olavide, Seville, Spain.
[Ti] Título:Allopatric speciation despite historical gene flow: Divergence and hybridization in Carex furva and C. lucennoiberica (Cyperaceae) inferred from plastid and nuclear RAD-seq data.
[So] Source:Mol Ecol;26(20):5646-5662, 2017 Oct.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Gene flow among incipient species can act as a creative or destructive force in the speciation process, generating variation on which natural selection can act while, potentially, undermining population divergence. The flowering plant genus Carex exhibits a rapid and relatively recent radiation with many species limits still unclear. This is the case with the Iberian Peninsula (Spain and Portugal)-endemic C. lucennoiberica, which lay unrecognized within Carex furva until its recent description as a new species. In this study, we test how these species were impacted by interspecific gene flow during speciation. We sampled the full range of distribution of C. furva (15 individuals sampled) and C. lucennoiberica (88 individuals), sequenced two cpDNA regions (atpI-atpH, psbA-trnH) and performed genomic sequencing of 45,100 SNPs using restriction site-associated DNA sequencing (RAD-seq). We utilized a set of partitioned D-statistic tests and demographic analyses to study the degree and direction of introgression. Additionally, we modelled species distributions to reconstruct changes in range distribution during glacial and interglacial periods. Plastid, nuclear and morphological data strongly support divergence between species with subsequent gene flow. Combined with species distribution modelling, these data support a scenario of allopatry leading to species divergence, followed by secondary contact and gene flow due to long-distance dispersal and/or range expansions and contractions in response to Quaternary glacial cycles. We conclude that this is a case of allopatric speciation despite historical secondary contacts, which could have temporally influenced the speciation process, contributing to the knowledge of forces that are driving or counteracting speciation.
[Mh] Termos MeSH primário: Carex (Planta)/classificação
Fluxo Gênico
Especiação Genética
Hibridização Genética
[Mh] Termos MeSH secundário: Núcleo Celular/genética
DNA de Cloroplastos/genética
Haplótipos
Filogenia
Portugal
Seleção Genética
Análise de Sequência de DNA
Espanha
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Chloroplast)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE
[do] DOI:10.1111/mec.14253


  2 / 159 MEDLINE  
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[PMID]:28011112
[Au] Autor:Kropacheva M; Melgunov M; Makarova I
[Ad] Endereço:Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the RAS. Russia, 630090, Novosibirsk, 3, Ac. Koptyuga ave. Electronic address: marya@igm.nsc.ru.
[Ti] Título:The artificial and natural isotopes distribution in sedge (Carex L.) biomass from the Yenisei River flood-plain: Adaptation of the sequential elution technique.
[So] Source:J Environ Radioact;167:180-187, 2017 Feb.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The study of migration pathways of artificial isotopes in the flood-plain biogeocoenoses, impacted by the nuclear fuel cycle plants, requires determination of isotope speciations in the biomass of higher terrestrial plants. The optimal method for their determination is the sequential elution technique (SET). The technique was originally developed to study atmospheric pollution by metals and has been applied to lichens, terrestrial and aquatic bryophytes. Due to morphological and physiological differences, it was necessary to adapt SET for new objects: coastal macrophytes growing on the banks of the Yenisei flood-plain islands in the near impact zone of Krasnoyarsk Mining and Chemical Combine (KMCC). In the first version of SET, 20 mM Na EDTA was used as a reagent at the first stage; in the second version of SET, it was 1 M CH COONH . Four fractions were extracted. Fraction I included elements from the intercellular space and those connected with the outer side of the cell wall. Fraction II contained intracellular elements; fraction III contained elements firmly bound in the cell wall and associated structures; fraction IV contained insoluble residue. Adaptation of SET has shown that the first stage should be performed immediately after sampling. Separation of fractions III and IV can be neglected, since the output of isotopes into the IV fraction is at the level of error detection. The most adequate version of SET for terrestrial vascular plants is the version using 20 mM Na EDTA at the first stage. Isotope Sr is most sensitive to the technique changes. Its distribution depends strongly on both the extractant used at stage 1 and duration of the first stage. Distribution of artificial radionuclides in the biomass of terrestrial vascular plants can vary from year to year and depends significantly on the age of the plant.
[Mh] Termos MeSH primário: Carex (Planta)/fisiologia
Plantas/química
Monitoramento de Radiação
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Biomassa
Plantas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170414
[Lr] Data última revisão:
170414
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161225
[St] Status:MEDLINE


  3 / 159 MEDLINE  
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[PMID]:27909827
[Au] Autor:Kang J; Zhao W; Zhao M
[Ad] Endereço:Linze Inland River Basin Research Station, Key Laboratory of Inland River Basin Ecohydrology, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, Gansu, China.
[Ti] Título:Remediation of blowouts by clonal plants in Maqu degraded alpine grasslands of northwest China.
[So] Source:J Plant Res;130(2):291-299, 2017 Mar.
[Is] ISSN:1618-0860
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:The sand-fixation of plants is considered to be the most effective and fundamental measure in desertification control in many arid and semi-arid regions. Carex brunnescens (Carex spp) and Leymus secalinus (Leymus), two perennial clonal herbs native to the Maqu degraded alpine areas of northwest China, are dominant and constructive species in active sand dunes that have excellent adaptability to fix sand dunes found to date. In order to study the ability and mechanism of sandland blowout remediation by two clone plants C. brunnescens and L. secalinus, the artificially emulated blowouts were set up in the populations of two clonal plants in the field. The results showed that both C. brunnescens and L. secalinus produced more new ramets in the artificially emulated blowouts than in the natural conditions, suggesting that the two clonal plants had strong ability in blowouts remediation; while the biomass, number of leaves and height of new ramets in the artificially emulated blowouts were less than in the natural conditions due to the restriction of poor nutrients in the artificially emulated blowouts. The ability of blowouts remediation by C. brunnescens was stronger than L. secalinus, as it generated more new ramets than L. secalinus in the process of blowouts remediation. The new ramets of L. secalinus in the blowouts remediation were mainly generated by the buds in the rhizomes which spread from outside of the blowouts; while those of C. brunnescens were generated both by the buds in the rhizomes which spread from outside, and by the buds in the rhizomes inside which were freed from dormancy in the deeper soil under wind erosion conditions. These findings suggest that through rapid clonal expansion capability, C. brunnescens and L. secalinus exhibited strong ability in blowouts remediation which can be one of the most effective strategies to restore and reconstruct degraded vegetations in Maqu alpine areas of northwest China.
[Mh] Termos MeSH primário: Carex (Planta)/crescimento & desenvolvimento
Conservação dos Recursos Naturais/métodos
Recuperação e Remediação Ambiental/métodos
Pradaria
Poaceae/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: China
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171014
[Lr] Data última revisão:
171014
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161203
[St] Status:MEDLINE
[do] DOI:10.1007/s10265-016-0884-2


  4 / 159 MEDLINE  
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[PMID]:27973589
[Au] Autor:Maguilla E; Escudero M
[Ad] Endereço:Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Seville, Spain.
[Ti] Título:Cryptic Species Due to Hybridization: A Combined Approach to Describe a New Species (Carex: Cyperaceae).
[So] Source:PLoS One;11(12):e0166949, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Disappearance of diagnostic morphological characters due to hybridization is considered to be one of the causes of the complex taxonomy of the species-rich (ca. 2000 described species) genus Carex (Cyperaceae). Carex furva s.l. belongs to section Glareosae. It is an endemic species from the high mountains of the Iberian Peninsula (Spain and Portugal). Previous studies suggested the existence of two different, cryptic taxa within C. furva s.l. Intermediate morphologies found in the southern Iberian Peninsula precluded the description of a new taxa. We aimed to determine whether C. furva s.l. should be split into two different species based on the combination of morphological and molecular data. We sampled ten populations across its full range and performed a morphological study based on measurements on herbarium specimens and silica-dried inflorescences. Both morphological and phylogenetic data support the existence of two different species within C. furva s.l. Nevertheless, intermediate morphologies and sterile specimens were found in one of the southern populations (Sierra Nevada) of C. furva s.l., suggesting the presence of hybrid populations in areas where both supposed species coexist. Hybridization between these two putative species has blurred morphological and genetic limits among them in this hybrid zone. We have proved the utility of combining molecular and morphological data to discover a new cryptic species in a scenario of hybridization. We now recognize a new species, C. lucennoiberica, endemic to the Iberian Peninsula (Sierra Nevada, Central system and Cantabrian Mountains). On the other hand, C. furva s.s. is distributed only in Sierra Nevada, where it may be threatened by hybridization with C. lucennoiberica. The restricted distribution of both species and their specific habitat requirements are the main limiting factors for their conservation.
[Mh] Termos MeSH primário: Evolução Biológica
Carex (Planta)/classificação
Hibridização Genética
Filogenia
[Mh] Termos MeSH secundário: Teorema de Bayes
Carex (Planta)/genética
Análise Discriminante
Ecossistema
Geografia
Hibridização de Ácido Nucleico
Análise de Componente Principal
Análise de Sequência de DNA
Espanha
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161216
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0166949


  5 / 159 MEDLINE  
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[PMID]:27780239
[Au] Autor:M Pedersen AT; Nowak MD; Brysting AK; Elven R; Bjorå CS
[Ad] Endereço:Natural History Museum, University of Oslo, Oslo, Norway.
[Ti] Título:Hybrid Origins of Carex rostrata var. borealis and C. stenolepis, Two Problematic Taxa in Carex Section Vesicariae (Cyperaceae).
[So] Source:PLoS One;11(10):e0165430, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Hybridization is frequent in the large and ecologically significant genus Carex (Cyperaceae). In four important sections of the northern regions (Ceratocystis, Glareosae, Phacocystis and Vesicariae), the frequent occurrence of hybrids often renders the identification of "pure" species and hybrids difficult. In this study we address the origins and taxonomic rank of two taxa of section Vesicariae: Carex rostrata var. borealis and C. stenolepis. The origin and taxonomic status of C. stenolepis has been the subject of substantial debate over the years, whereas C. rostrata var. borealis has received very little attention in the years since its first description in the 19th century. By performing an extensive sampling of relevant taxa from a broad distribution range, and analyzing data from fifteen microsatellite loci developed specifically for our study together with pollen stainability measures, we resolve the hybrid origins of C. rostrata var. borealis and C. stenolepis and provide new insights into this taxonomically challenging group of sedges. Our results are in accordance with previous findings suggesting that C. stenolepis is a hybrid between C. vesicaria and C. saxatilis. They are also in accordance with a previous proposition that C. rostrata var. borealis is a hybrid between C. rostrata and C. rotundata, and furthermore suggest that both hybrids are the result of multiple, recent (i.e., postglacial) hybridization events. We found little evidence for successful sexual reproduction within C. rostrata var. borealis and C. stenolepis, but conclude that the common and recurrent, largely predictable occurrence of these taxa justifies accepting both hybrids as hybrid species with binomial names. There are, however, complications as to types and priority names, and we therefore choose to address these problems in a separate paper.
[Mh] Termos MeSH primário: Carex (Planta)/genética
Hibridização Genética
[Mh] Termos MeSH secundário: DNA de Plantas/química
DNA de Plantas/isolamento & purificação
DNA de Plantas/metabolismo
Repetições de Microssatélites/genética
Análise de Componente Principal
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Plant)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170614
[Lr] Data última revisão:
170614
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0165430


  6 / 159 MEDLINE  
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[PMID]:27558707
[Au] Autor:Escudero M; Hahn M; Brown BH; Lueders K; Hipp AL
[Ad] Endereço:The Morton Arboretum, 4100 Illinois Route 53, Lisle, Illinois 60532 USA Department of Botany, The Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, Illinois 60605 USA Department of Plant Biology and Ecology, University of Seville, Reina Mercedes sn 41010 Seville, Spain. amesclir@gm
[Ti] Título:Chromosomal rearrangements in holocentric organisms lead to reproductive isolation by hybrid dysfunction: The correlation between karyotype rearrangements and germination rates in sedges.
[So] Source:Am J Bot;103(8):1529-36, 2016 08.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: Understanding the drivers of speciation is a central task of evolutionary biology. Chromosomal rearrangements are known to play an important role in species diversification, but the role of rearrangements of holocentric chromosomes-chromosomes without localized centromeres-is poorly understood. METHODS: We made numerous artificial crosses between Carex scoparia individuals of different diploid chromosome numbers and, for comparison, between individuals of the same chromosome number. We studied chromosome pairing and chromosomal rearrangements in the F1 individuals using light microscopy. We then estimated germination rates as a function of geographic distance, genetic distance, chromosome number differences in parents, and pairing irregularities in F1 individuals, using generalized least squares to fit alternative regression models. KEY RESULTS: The most informative predictors of germination rates in the F1 generation are chromosome number differences and minimum number of chromosome pairing irregularities in the F1 individuals. Genetic and geographic distances between parents are not significant predictors. CONCLUSIONS: Holocentric chromosomal rearrangements play an important role in postzygotic reproductive isolation in Carex through F1 hybrid inviability and sterility. Hybrid dysfunction seems to be a suitable model for chromosomal speciation when there are several chromosomal rearrangements between parents. However, we have not tested the hypothesis that genome rearrangements may also play an important role in suppressing recombination between cytogenetically divergent populations.
[Mh] Termos MeSH primário: Carex (Planta)/fisiologia
Germinação/genética
Cariótipo
Isolamento Reprodutivo
[Mh] Termos MeSH secundário: Carex (Planta)/genética
Evolução Molecular
Rearranjo Gênico/genética
Geografia
Hibridização Genética/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171121
[Lr] Data última revisão:
171121
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160826
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1600051


  7 / 159 MEDLINE  
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[PMID]:27317885
[Au] Autor:Massatti R; Knowles LL
[Ad] Endereço:Department of Ecology and Evolutionary Biology, The University of Michigan, Ann Arbor, MI, 41809-1079, USA.
[Ti] Título:Contrasting support for alternative models of genomic variation based on microhabitat preference: species-specific effects of climate change in alpine sedges.
[So] Source:Mol Ecol;25(16):3974-86, 2016 Aug.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Deterministic processes may uniquely affect codistributed species' phylogeographic patterns such that discordant genetic variation among taxa is predicted. Yet, explicitly testing expectations of genomic discordance in a statistical framework remains challenging. Here, we construct spatially and temporally dynamic models to investigate the hypothesized effect of microhabitat preferences on the permeability of glaciated regions to gene flow in two closely related montane species. Utilizing environmental niche models from the Last Glacial Maximum and the present to inform demographic models of changes in habitat suitability over time, we evaluate the relative probabilities of two alternative models using approximate Bayesian computation (ABC) in which glaciated regions are either (i) permeable or (ii) a barrier to gene flow. Results based on the fit of the empirical data to data sets simulated using a spatially explicit coalescent under alternative models indicate that genomic data are consistent with predictions about the hypothesized role of microhabitat in generating discordant patterns of genetic variation among the taxa. Specifically, a model in which glaciated areas acted as a barrier was much more probable based on patterns of genomic variation in Carex nova, a wet-adapted species. However, in the dry-adapted Carex chalciolepis, the permeable model was more probable, although the difference in the support of the models was small. This work highlights how statistical inferences can be used to distinguish deterministic processes that are expected to result in discordant genomic patterns among species, including species-specific responses to climate change.
[Mh] Termos MeSH primário: Carex (Planta)/genética
Mudança Climática
Ecossistema
Genética Populacional
Modelos Genéticos
[Mh] Termos MeSH secundário: Teorema de Bayes
Carex (Planta)/classificação
Colorado
Genômica
Camada de Gelo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160619
[St] Status:MEDLINE
[do] DOI:10.1111/mec.13735


  8 / 159 MEDLINE  
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[PMID]:27001405
[Au] Autor:Hu YL; Tan JL; Wang CL; Yang ZB; Yang YX; Chen Z; Lin LJ; Wang YJ; Sun G; Zhu XM; Shao JR; Zhou ML
[Ti] Título:Research on Root Responses to Pb and Zn Combined Stress of Carex putuoshan.
[So] Source:Protein Pept Lett;23(5):478-87, 2016.
[Is] ISSN:1875-5305
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Pb hyper-accumulated Carex putuoshan was taken as experimental material and subjected to combined stress of Pb and Zn. The differential expression of proteins in their roots were analyzed by Proteomic Approach. The protein that was directly involved in the cellular defense under the Pb and Zn combined stress was separated, and expression of those genes was analyzed with Carex Evergold as control. The results were obtained by MALDI-TOF/MS analysis. After applying Pb and Zn combined stress, the expression of 9 protein spots (including 7 different proteins, 2 identical proteins, 1 unknown protein) in Carex putuoshan root was found to be significantly up-regulated. Five proteins were obtained from the 9 proteins related to carbohydrate metabolism, including malate dehydrogenase, glyceraldehyde-3-phosphate dehydrogenase, frutose-1,6-bisphosphate aldolase, enolase, and 6- phosphogluconate dehydrogenase. Two proteins were related to protein biosynthesis, including isoflavone reductase and phytochelatin synthase (PCS). From these proteins, the most important protein is PCS, which is a key enzyme in the synthesis of phytochelatins (PCs) and plays an important role in chelation. It is directly involved in cellular defense under Pb and Zn stress. After Pb and Zn combined stress, the CpPCS in Carex putuoshan was cloned. The full length of cDNA is 1461 bps, and it encodes 486 amino acids with molecular weight of 53.86 kD and pI value of 6.12. Two typical phytochelatin synthase subfamily domains constitute CpPCS protein, which includes three adjacent Cys-Cys elements in the C-terminal region. Phylogenetic analysis of PCS proteins from different species showed that it had the closest relationship with the Oryza sativa and Triticum aestivum. Real-time quantitative PCR analysis indicated that CpPCS and CePCS (Carex Evergold) genes were expressed in the root. The CpPCS and CePCS genes were up-regulated by Pb and Zn treatments. The expression of CpPCS was higher than that of CePCS under the same condition. The study found that CpPCS expression was increased by Pb and Zn stress in the Carex putuoshan enrichment process of Pb, which lead to high expression of PCS protein. CpPCS improved the accumulation ability and resistance of Carex putuoshan to heavy metals with the expression level of glucose metabolism related proteins increasing after Pb and Zn stress.
[Mh] Termos MeSH primário: Carex (Planta)/efeitos dos fármacos
Chumbo/toxicidade
Raízes de Plantas/efeitos dos fármacos
Estresse Fisiológico/efeitos dos fármacos
Zinco/toxicidade
[Mh] Termos MeSH secundário: Carex (Planta)/metabolismo
Modelos Moleculares
Proteínas de Plantas/análise
Proteínas de Plantas/metabolismo
Raízes de Plantas/metabolismo
Reação em Cadeia da Polimerase
Conformação Proteica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 2P299V784P (Lead); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170105
[Lr] Data última revisão:
170105
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160323
[St] Status:MEDLINE


  9 / 159 MEDLINE  
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[PMID]:26851268
[Au] Autor:Massatti R; Reznicek AA; Knowles LL
[Ad] Endereço:Department of Ecology and Evolutionary Biology, The University of Michigan, Ann Arbor, Michigan, 41809-1079 USA massatti@umich.edu.
[Ti] Título:Utilizing RADseq data for phylogenetic analysis of challenging taxonomic groups: A case study in Carex sect. Racemosae.
[So] Source:Am J Bot;103(2):337-47, 2016 Feb.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: Relationships among closely related and recently diverged taxa can be especially difficult to resolve. Here we use both Sanger sequencing and next-generation RADseq data sets to estimate phylogenetic relationships among species of Carex section Racemosae (Cyperaceae), a clade largely restricted to high latitudes and elevations. Interest in relationships among these taxa derives from questions about the species' biogeographic histories and possible links between diversification and Pleistocene glaciations. METHODS: A combination of approaches and molecular markers were used to estimate relationships among Carex species within sect. Racemosae and taxa from closely related sections. Nuclear and chloroplast loci generated by Sanger sequencing were analyzed with *BEAST, and SNP data from RADseq loci were analyzed as a concatenated data set using maximum likelihood and as independent loci using SVDquartets. KEY RESULTS: Sanger sequencing data sets resolved relationships among taxa at intermediate phylogenetic depths (albeit with low levels of support). Only the RADseq data resolved relationships with strong support at all phylogenetic depths. Moreover, different methods and data partitions of the RADseq data resulted in nearly identical topologies. Carex sect. Racemosae is a strongly supported clade, although a handful of species were found to group with closely related sections. Herbarium specimens up to 35 yr old successfully produced informative RADseq data. CONCLUSIONS: Despite the short read lengths of RADseq data, they nevertheless resolved relationships that Sanger sequencing data did not. Resolution of the phylogenetic relationships among recently and rapidly diversifying taxa within sect. Racemosae clades suggest a role for the Pleistocene glaciations in clade diversification.
[Mh] Termos MeSH primário: Carex (Planta)/genética
Evolução Molecular
Filogenia
[Mh] Termos MeSH secundário: Núcleo Celular/genética
Cloroplastos/genética
DNA Intergênico/genética
DNA de Plantas/genética
Dados de Sequência Molecular
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (DNA, Intergenic); 0 (DNA, Plant)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160218
[Lr] Data última revisão:
160218
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160207
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1500315


  10 / 159 MEDLINE  
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[PMID]:26702956
[Au] Autor:Spalink D; Drew BT; Pace MC; Zaborsky JG; Li P; Cameron KM; Givnish TJ; Sytsma KJ
[Ad] Endereço:Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI 53706, USA. Electronic address: dspalink@wisc.edu.
[Ti] Título:Evolution of geographical place and niche space: Patterns of diversification in the North American sedge (Cyperaceae) flora.
[So] Source:Mol Phylogenet Evol;95:183-95, 2016 Feb.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The role of geography and ecology in speciation are often discussed in the context of phylogenetic niche conservatism (PNC), the propensity of lineages to retain ancestral niche related traits. However, a recent paradigm shift focuses instead on measuring divergence of these traits in conjunction with patterns of speciation. Under this framework, we analyzed the diversification of North America's third most diverse family, Cyperaceae ("sedges"), using a modified Parsimony Analysis of Endemicity approach to identify floristic regions and ordination statistics to quantify species distribution in a continuous manner. Utilizing over 200,000 georeferenced specimens, we characterized the geographical distribution and climatic and edaphic niche space occupied by each species. We constructed a supermatrix phylogeny of the North American sedge flora, aided in part by the sequencing of all sedges of Wisconsin, and employed a multifaceted approach to assess the role of geographical and ecological divergence on lineage diversification. In addition to measuring phylogenetic signal for these traits, we also measured pairwise phylogenetic distance of species within floristic regions, calculated rates of speciation, and tested for correlations of speciation rate to tempo of geographical and ecological evolution. Our analyses consistently show that evolutionarily related species tend to be geographically unrelated. Rates of geographical and ecological diversification are closely linked to tempo of speciation, and exploration of geographical place coincides with divergence in ecological niche space. We highlight the benefits of treating geography in a continuous manner, and stress the importance of employing a diverse suite of analytical approaches in testing hypotheses regarding the evolution of range and niche.
[Mh] Termos MeSH primário: Carex (Planta)/classificação
Carex (Planta)/genética
Evolução Molecular
Especiação Genética
[Mh] Termos MeSH secundário: Cyperaceae/classificação
Cyperaceae/genética
Ecossistema
Geografia
América do Norte
Fenótipo
Filogenia
Filogeografia
Estados Unidos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160122
[Lr] Data última revisão:
160122
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151226
[St] Status:MEDLINE



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