Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.156 [Categoria DeCS]
Referências encontradas : 534 [refinar]
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[PMID]:28460034
[Au] Autor:Li Z; De La Torre AR; Sterck L; Cánovas FM; Avila C; Merino I; Cabezas JA; Cervera MT; Ingvarsson PK; Van de Peer Y
[Ad] Endereço:Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.
[Ti] Título:Single-Copy Genes as Molecular Markers for Phylogenomic Studies in Seed Plants.
[So] Source:Genome Biol Evol;9(5):1130-1147, 2017 05 01.
[Is] ISSN:1759-6653
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Phylogenetic relationships among seed plant taxa, especially within the gymnosperms, remain contested. In contrast to angiosperms, for which several genomic, transcriptomic and phylogenetic resources are available, there are few, if any, molecular markers that allow broad comparisons among gymnosperm species. With few gymnosperm genomes available, recently obtained transcriptomes in gymnosperms are a great addition to identifying single-copy gene families as molecular markers for phylogenomic analysis in seed plants. Taking advantage of an increasing number of available genomes and transcriptomes, we identified single-copy genes in a broad collection of seed plants and used these to infer phylogenetic relationships between major seed plant taxa. This study aims at extending the current phylogenetic toolkit for seed plants, assessing its ability for resolving seed plant phylogeny, and discussing potential factors affecting phylogenetic reconstruction. In total, we identified 3,072 single-copy genes in 31 gymnosperms and 2,156 single-copy genes in 34 angiosperms. All studied seed plants shared 1,469 single-copy genes, which are generally involved in functions like DNA metabolism, cell cycle, and photosynthesis. A selected set of 106 single-copy genes provided good resolution for the seed plant phylogeny except for gnetophytes. Although some of our analyses support a sister relationship between gnetophytes and other gymnosperms, phylogenetic trees from concatenated alignments without 3rd codon positions and amino acid alignments under the CAT + GTR model, support gnetophytes as a sister group to Pinaceae. Our phylogenomic analyses demonstrate that, in general, single-copy genes can uncover both recent and deep divergences of seed plant phylogeny.
[Mh] Termos MeSH primário: Cycadopsida/genética
Magnoliopsida/genética
[Mh] Termos MeSH secundário: Evolução Biológica
Cycadopsida/classificação
Genes de Plantas
Magnoliopsida/classificação
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171206
[Lr] Data última revisão:
171206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE
[do] DOI:10.1093/gbe/evx070


  2 / 534 MEDLINE  
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[PMID]:28886111
[Au] Autor:Roodt D; Lohaus R; Sterck L; Swanepoel RL; Van de Peer Y; Mizrachi E
[Ad] Endereço:Department of Genetics, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Private bag X20, Pretoria, South Africa.
[Ti] Título:Evidence for an ancient whole genome duplication in the cycad lineage.
[So] Source:PLoS One;12(9):e0184454, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Contrary to the many whole genome duplication events recorded for angiosperms (flowering plants), whole genome duplications in gymnosperms (non-flowering seed plants) seem to be much rarer. Although ancient whole genome duplications have been reported for most gymnosperm lineages as well, some are still contested and need to be confirmed. For instance, data for ginkgo, but particularly cycads have remained inconclusive so far, likely due to the quality of the data available and flaws in the analysis. We extracted and sequenced RNA from both the cycad Encephalartos natalensis and Ginkgo biloba. This was followed by transcriptome assembly, after which these data were used to build paralog age distributions. Based on these distributions, we identified remnants of an ancient whole genome duplication in both cycads and ginkgo. The most parsimonious explanation would be that this whole genome duplication event was shared between both species and had occurred prior to their divergence, about 300 million years ago.
[Mh] Termos MeSH primário: Cycadopsida/genética
Duplicação Gênica
Genoma de Planta
Genômica
[Mh] Termos MeSH secundário: Cycadopsida/classificação
Perfilação da Expressão Gênica
Genômica/métodos
Ginkgo biloba/genética
Filogenia
Transcriptoma
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170909
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184454


  3 / 534 MEDLINE  
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[PMID]:28388891
[Au] Autor:Coiro M; Pott C
[Ad] Endereço:Department of Systematic and Evolutionary Botany, University of Zurich, Zollikerstrasse, 107 8008, Zurich, Switzerland. mario.coiro@systbot.uzh.ch.
[Ti] Título:Eobowenia gen. nov. from the Early Cretaceous of Patagonia: indication for an early divergence of Bowenia?
[So] Source:BMC Evol Biol;17(1):97, 2017 Apr 07.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Even if they are considered the quintessential "living fossils", the fossil record of the extant genera of the Cycadales is quite poor, and only extends as far back as the Cenozoic. This lack of data represents a huge hindrance for the reconstruction of the recent history of this important group. Among extant genera, Bowenia (or cuticles resembling those of extant Bowenia) has been recorded in sediments from the Late Cretaceous and the Eocene of Australia, but its phylogenetic placement and the inference from molecular dating still imply a long ghost lineage for this genus. RESULTS: We re-examine the fossil foliage Almargemia incrassata from the Lower Cretaceous Anfiteatro de Ticó Formation in Patagonia, Argentina, in the light of a comparative cuticular analysis of extant Zamiaceae. We identify important differences with the other member of the genus, viz. A. dentata, and bring to light some interesting characters shared exclusively between A. incrassata and extant Bowenia. We interpret our results to necessitate the erection of the new genus Eobowenia to accommodate the fossil leaf earlier assigned as Almargemia incrassata. We then perfom phylogenetic analyses, including the first combined morphological and molecular analysis of the Cycadales, that indicate that the newly erected genus could be related to extant Bowenia. CONCLUSION: Eobowenia incrassata could represent an important clue for the understanding of evolution and biogeography of the extant genus Bowenia, as the presence of Eobowenia in Patagonia is yet another piece of the biogeographic puzzle that links southern South America with Australasia.
[Mh] Termos MeSH primário: Evolução Biológica
Cycadopsida
Fósseis
[Mh] Termos MeSH secundário: Argentina
Austrália
Especiação Genética
Filogenia
Folhas de Planta/anatomia & histologia
América do Sul
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170409
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-0943-x


  4 / 534 MEDLINE  
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[PMID]:28333233
[Au] Autor:De La Torre AR; Li Z; Van de Peer Y; Ingvarsson PK
[Ad] Endereço:Department of Plant Sciences, University of California-Davis, Davis, CA.
[Ti] Título:Contrasting Rates of Molecular Evolution and Patterns of Selection among Gymnosperms and Flowering Plants.
[So] Source:Mol Biol Evol;34(6):1363-1377, 2017 Jun 01.
[Is] ISSN:1537-1719
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The majority of variation in rates of molecular evolution among seed plants remains both unexplored and unexplained. Although some attention has been given to flowering plants, reports of molecular evolutionary rates for their sister plant clade (gymnosperms) are scarce, and to our knowledge differences in molecular evolution among seed plant clades have never been tested in a phylogenetic framework. Angiosperms and gymnosperms differ in a number of features, of which contrasting reproductive biology, life spans, and population sizes are the most prominent. The highly conserved morphology of gymnosperms evidenced by similarity of extant species to fossil records and the high levels of macrosynteny at the genomic level have led scientists to believe that gymnosperms are slow-evolving plants, although some studies have offered contradictory results. Here, we used 31,968 nucleotide sites obtained from orthologous genes across a wide taxonomic sampling that includes representatives of most conifers, cycads, ginkgo, and many angiosperms with a sequenced genome. Our results suggest that angiosperms and gymnosperms differ considerably in their rates of molecular evolution per unit time, with gymnosperm rates being, on average, seven times lower than angiosperm species. Longer generation times and larger genome sizes are some of the factors explaining the slow rates of molecular evolution found in gymnosperms. In contrast to their slow rates of molecular evolution, gymnosperms possess higher substitution rate ratios than angiosperm taxa. Finally, our study suggests stronger and more efficient purifying and diversifying selection in gymnosperm than in angiosperm species, probably in relation to larger effective population sizes.
[Mh] Termos MeSH primário: Cycadopsida/genética
[Mh] Termos MeSH secundário: Sequência de Bases/genética
Evolução Molecular
Genes de Plantas/genética
Genoma de Planta/genética
Genômica/métodos
Magnoliopsida/genética
Taxa de Mutação
Filogenia
Sementes/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/molbev/msx069


  5 / 534 MEDLINE  
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[PMID]:28264331
[Au] Autor:Masumoto M; Okajima S
[Ad] Endereço:Yokohama Plant Protection Station, 5-57, Kitanakadori, Naka-ku, Yokohama, 231-0003, Japan.. masumotom@pps.maff.go.jp.
[Ti] Título:Paroxythrips gen. n. (Thysanoptera, Thripidae), associated with the gymnosperm order Araucariales in Japan and Australia.
[So] Source:Zootaxa;4236(2):zootaxa.4236.2.9, 2017 Feb 22.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:An Oxythrips-like new genus and species, Paroxythrips podocarpi, is described from Podocarpus macrophyllus in Japan. An Australian species, Oxythrips agathidis Morison, that is associated with Agathis is transferred to Paroxythrips.
[Mh] Termos MeSH primário: Tisanópteros
[Mh] Termos MeSH secundário: Distribuição Animal
Animais
Austrália
Cycadopsida
Japão
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170308
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4236.2.9


  6 / 534 MEDLINE  
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[PMID]:28116770
[Au] Autor:Moeller DA; Briscoe Runquist RD; Moe AM; Geber MA; Goodwillie C; Cheptou PO; Eckert CG; Elle E; Johnston MO; Kalisz S; Ree RH; Sargent RD; Vallejo-Marin M; Winn AA
[Ad] Endereço:Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, 55108, USA.
[Ti] Título:Global biogeography of mating system variation in seed plants.
[So] Source:Ecol Lett;20(3):375-384, 2017 Mar.
[Is] ISSN:1461-0248
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Latitudinal gradients in biotic interactions have been suggested as causes of global patterns of biodiversity and phenotypic variation. Plant biologists have long speculated that outcrossing mating systems are more common at low than high latitudes owing to a greater predictability of plant-pollinator interactions in the tropics; however, these ideas have not previously been tested. Here, we present the first global biogeographic analysis of plant mating systems based on 624 published studies from 492 taxa. We found a weak decline in outcrossing rate towards higher latitudes and among some biomes, but no biogeographic patterns in the frequency of self-incompatibility. Incorporating life history and growth form into biogeographic analyses reduced or eliminated the importance of latitude and biome in predicting outcrossing or self-incompatibility. Our results suggest that biogeographic patterns in mating system are more likely a reflection of the frequency of life forms across latitudes rather than the strength of plant-pollinator interactions.
[Mh] Termos MeSH primário: Cycadopsida/fisiologia
Magnoliopsida/fisiologia
Polinização
Autofertilização
[Mh] Termos MeSH secundário: Biodiversidade
Dispersão Vegetal
Reprodução
[Pt] Tipo de publicação:LETTER
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170125
[St] Status:MEDLINE
[do] DOI:10.1111/ele.12738


  7 / 534 MEDLINE  
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[PMID]:28057327
[Au] Autor:Yokota T; Ohnishi T; Shibata K; Asahina M; Nomura T; Fujita T; Ishizaki K; Kohchi T
[Ad] Endereço:Department of Biosciences, Teikyo University, 1-1 Toyosatodai, Utsunomiya 320-8551, Japan. Electronic address: yokota@nasu.bio.teikyo-u.ac.jp.
[Ti] Título:Occurrence of brassinosteroids in non-flowering land plants, liverwort, moss, lycophyte and fern.
[So] Source:Phytochemistry;136:46-55, 2017 Apr.
[Is] ISSN:1873-3700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Endogenous brassinosteroids (BRs) in non-flowering land plants were analyzed. BRs were found in a liverwort (Marchantia polymorpha), a moss (Physcomitrella patens), lycophytes (Selaginella moellendorffii and S. uncinata) and 13 fern species. A biologically active BR, castasterone (CS), was identified in most of these non-flowering plants but another biologically active BR, brassinolide, was not. It may be distinctive that levels of CS in non-flowering plants were orders of magnitude lower than those in flowering plants. 22-Hydroxycampesterol and its metabolites were identified in most of the non-flowering plants suggesting that the biosynthesis of BRs via 22-hydroxylation of campesterol occurs as in flowering plants. Phylogenetic analyses indicated that M. polymorpha, P. patens and S. moellendorffii have cytochrome P450s in the CYP85 clans which harbors BR biosynthesis enzymes, although the P450 profiles are simpler as compared with Arabidopsis and rice. Furthermore, these basal land plants were found to have multiple P450s in the CYP72 clan which harbors enzymes to catabolize BRs. These findings indicate that green plants were able to synthesize and inactivate BRs from the land-transition stage.
[Mh] Termos MeSH primário: Brassinosteroides/isolamento & purificação
Cycadopsida/química
[Mh] Termos MeSH secundário: Arabidopsis/química
Brassinosteroides/química
Brassinosteroides/metabolismo
Briófitas/química
Bryopsida/química
Sistema Enzimático do Citocromo P-450/metabolismo
Gleiquênias/química
Hepatófitas/química
Marchantia/química
Oryza/química
Filogenia
Selaginellaceae/química
Esteroides Heterocíclicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Brassinosteroids); 0 (Steroids, Heterocyclic); 9035-51-2 (Cytochrome P-450 Enzyme System); Y9IQ1L53OX (brassinolide)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170107
[St] Status:MEDLINE


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[PMID]:27832432
[Au] Autor:Reddy CS; Satish KV; Jha CS; Diwakar PG; Murthy YV; Dadhwal VK
[Ad] Endereço:National Remote Sensing Centre, Indian Space Research Organisation, Balanagar, Hyderabad, 500 037, India. drsudhakarreddy@gmail.com.
[Ti] Título:Development of deforestation and land cover database for Bhutan (1930-2014).
[So] Source:Environ Monit Assess;188(12):658, 2016 Dec.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Bhutan is a mountainous country located in the Himalayan biodiversity hotspot. This study has quantified the total area under land cover types, estimated the rate of forest cover change, analyzed the changes across forest types, and modeled forest cover change hotpots in Bhutan. The topographical maps and satellite remote sensing images were analyzed to get the spatial patterns of forest and associated land cover changes over the past eight decades (1930-1977-1987-1995-2005-2014). Forest is the largest land cover in Bhutan and constitutes 68.3% of the total geographical area in 2014. Subtropical broad leaved hill forest is predominant type occupies 34.1% of forest area in Bhutan, followed by montane dry temperate (20.9%), montane wet temperate (18.9%), Himalayan moist temperate (10%), and tropical moist sal (8.1%) in 2014. The major forest cover loss is observed in subtropical broad leaved hill forest (64.5 km ) and moist sal forest (9.9 km ) from 1977 to 2014. The deforested areas have mainly been converted into agriculture and contributed for 60.9% of forest loss from 1930 to 2014. In spite of major decline of forest cover in time interval of 1930-1977, there is no net rate of deforestation is recorded in Bhutan since 1995. Forest cover change analysis has been carried out to evaluate the conservation effectiveness in "Protected Areas" of Bhutan. Hotspots that have undergone high transformation in forest cover for afforestation and deforestation were highlighted in the study for conservation prioritisation. Forest conservation policies in Bhutan are highly effective in controlling deforestation as compared to neighboring Asian countries and such service would help in mitigating climate change.
[Mh] Termos MeSH primário: Conservação dos Recursos Naturais/métodos
Cycadopsida/crescimento & desenvolvimento
Monitoramento Ambiental/métodos
Florestas
Magnoliopsida/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Agricultura
Butão
Biodiversidade
Mudança Climática
Modelos Teóricos
Imagens de Satélites
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1612
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161111
[St] Status:MEDLINE


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[PMID]:27808387
[Au] Autor:Gonçalves FR; Vieira FA; Carvalho D
[Ad] Endereço:RGA Engenharia & Meio Ambiente, Passos, MG, Brasil.
[Ti] Título:Naturally fragmented but not genetically isolated populations of Podocarpus sellowii Klotzsch (Podocarpaceae) in southeast Brazil.
[So] Source:Genet Mol Res;15(4), 2016 Oct 06.
[Is] ISSN:1676-5680
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:In southeastern Brazil, the majority of the riparian ecosystems are fragmented and degraded mainly due to human activities. The perennial gymnosperm Podocarpus sellowii Klotzch is a typical tree species from a gallery forest in the rupestrian area. Ten alloenzymatic loci were used to estimate the allelic frequency of 232 individuals distributed in eight subpopulations naturally divided by rock outcrops. The results indicated high genetic variability for the species in all subpopulations, with H varying from 0.593 to 0.658, and H , from 0.484 to 0.502. No endogamy was observed within (f = -0.292) and for the population set (f = -0.264). Genetic divergence of the species between subpopulations was 2.1%. Historic gene flow was low between subpopulations located in different water streams, corroborating the positive and significant correlation between genetic and geographical distance (r = 0.496, P = 0.022). Co-ancestry revealed that only population A presents continuous distribution of the genotypes up to 94 m. Sp statistics did not indicate significant spatial genetic structure in the populations. In all the subpopulations, values of effective sizes were higher than the numbers of sampled individuals. The balance between mutation and drift was not verified, indicating the occurrence of a recent population bottleneck. These data can be used to determine the most effective strategies for the genetic conservation of this species.
[Mh] Termos MeSH primário: Cycadopsida/genética
Isoenzimas/genética
[Mh] Termos MeSH secundário: Brasil
Cycadopsida/enzimologia
Ecossistema
Florestas
Fluxo Gênico
Frequência do Gene
Deriva Genética
Variação Genética
Genótipo
Geografia
Repetições de Microssatélites
Árvores/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Isoenzymes)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161104
[St] Status:MEDLINE
[do] DOI:10.4238/gmr.15048871


  10 / 534 MEDLINE  
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[PMID]:27605169
[Au] Autor:Alméras T; Clair B
[Ad] Endereço:Laboratoire de Mécanique et Génie Civil (LMGC), CNRS, Université de Montpellier, cc 048, Place E. Bataillon, 34095 Montpellier, France tancrede.almeras@umontpellier.fr.
[Ti] Título:Critical review on the mechanisms of maturation stress generation in trees.
[So] Source:J R Soc Interface;13(122), 2016 Sep.
[Is] ISSN:1742-5662
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Trees control their posture by generating asymmetric mechanical stress around the periphery of the trunk or branches. This stress is produced in wood during the maturation of the cell wall. When the need for reaction is high, it is accompanied by strong changes in cell organization and composition called reaction wood, namely compression wood in gymnosperms and tension wood in angiosperms. The process by which stress is generated in the cell wall during its formation is not yet known, and various hypothetical mechanisms have been proposed in the literature. Here we aim at discriminating between these models. First, we summarize current knowledge about reaction wood structure, state and behaviour relevant to the understanding of maturation stress generation. Then, the mechanisms proposed in the literature are listed and discussed in order to identify which can be rejected based on their inconsistency with current knowledge at the frontier between plant science and mechanical engineering.
[Mh] Termos MeSH primário: Parede Celular/fisiologia
Cycadopsida/fisiologia
Magnoliopsida/fisiologia
Estresse Fisiológico
Árvores/fisiologia
Madeira/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160909
[St] Status:MEDLINE



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