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Pesquisa : B01.650.940.800.575.912.250.881.666 [Categoria DeCS]
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[PMID]:29447168
[Au] Autor:Abraham PE; Garcia BJ; Gunter LE; Jawdy SS; Engle N; Yang X; Jacobson DA; Hettich RL; Tuskan GA; Tschaplinski TJ
[Ad] Endereço:Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America.
[Ti] Título:Quantitative proteome profile of water deficit stress responses in eastern cottonwood (Populus deltoides) leaves.
[So] Source:PLoS One;13(2):e0190019, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Drought stress is a recurring feature of world climate and the single most important factor influencing agricultural yield worldwide. Plants display highly variable, species-specific responses to drought and these responses are multifaceted, requiring physiological and morphological changes influenced by genetic and molecular mechanisms. Moreover, the reproducibility of water deficit studies is very cumbersome, which significantly impedes research on drought tolerance, because how a plant responds is highly influenced by the timing, duration, and intensity of the water deficit. Despite progress in the identification of drought-related mechanisms in many plants, the molecular basis of drought resistance remains to be fully understood in trees, particularly in poplar species because their wide geographic distribution results in varying tolerances to drought. Herein, we aimed to better understand this complex phenomenon in eastern cottonwood (Populus deltoides) by performing a detailed contrast of the proteome changes between two different water deficit experiments to identify functional intersections and divergences in proteome responses. We investigated plants subjected to cyclic water deficit and compared these responses to plants subjected to prolonged acute water deficit. In total, we identified 108,012 peptide sequences across both experiments that provided insight into the quantitative state of 22,737 Populus gene models and 8,199 functional protein groups in response to drought. Together, these datasets provide the most comprehensive insight into proteome drought responses in poplar to date and a direct proteome comparison between short period dehydration shock and cyclic, post-drought re-watering. Overall, this investigation provides novel insights into drought avoidance mechanisms that are distinct from progressive drought stress. Additionally, we identified proteins that have been associated as drought-relevant in previous studies. Importantly, we highlight the RD26 transcription factor as a gene regulated at both the transcript and protein level, regardless of species and drought condition, and, thus, represents a key, universal drought marker for Populus species.
[Mh] Termos MeSH primário: Proteínas de Plantas/metabolismo
Populus/metabolismo
Proteoma
Estresse Fisiológico
[Mh] Termos MeSH secundário: Cromatografia Líquida
Secas
Espectrometria de Massas em Tandem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Proteome)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180216
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190019


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[PMID]:29247932
[Au] Autor:Yildirim K; Kasim GÇ
[Ad] Endereço:GOP University, Department of Bioengineering, Tokat, Turkey. Electronic address: kubi_yildirim@yahoo.com.
[Ti] Título:Phytoremediation potential of poplar and willow species in small scale constructed wetland for boron removal.
[So] Source:Chemosphere;194:722-736, 2018 Mar.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Boron (B) pollution is an expanding environmental problem throughout the world due to intensive mining practices and extensive usage of B in agricultural chemicals and industrial products in recent years. The purpose of this study was to investigate B removal performance of four poplar and four willow species in small scale Constructed Wetland (CW). Rooted cuttings of tested species were treated with simulated wastewater having five elevated B concentrations (0.5, 5, 10, 20 and 40 ppm). All the tested species could resist up to 20 ppm wastewater B supply and could regrow from their roots in the soil having maximum 15 mg/kg B content. The result of the study indicated that 65% ± 5.3 of B was removed from the wastewater in 5 ppm B treatment while the same efficiency decreased to 45% ± 4.6 at 40 ppm B supply. The average effect of sediment on B removal was found to be approximately 20% for all B treatments while the remaining part of the loaded B was removed from the CW within effluent (35-54%). Therefore, actual effects of plant species on B removal was ranged from 45% to 25% between 5 and 40 ppm B treatments. Mass B removal within plant body (phytextraction) comprised the 13-10% of total loaded B in CW while the remaining part of the loaded B (31-15%) was stabilized into the sediment with the effects of poplar and willow roots. These results presented clear understanding of effective B purification mechanisms in CWs. Boron phytextraction capacity of a plant species was less effective than its phytstabilization efficiency which increase filtering capacity of the sediment and stabilization of more B around the rhizosphere. In terms of their B removal ability, P.nigra and S.anatolica had the highest B removal capacities with phytextraction (20-11%) while S.alba, P.alba and S.babylonica had more phytstabilizaiton performance (40-15%) in CW. Disposal of B loaded plant material create another environmental costs for CW applications. Therefore, B loaded wood and leaf tissues were mixed and used for production of wooden panels in the study. Then a combustion test was applied on these panels to test their fire resistance. The results of the tests revealed much higher burning tolerance of the B loaded panels (5-20%) compared to controls. Annual harvesting, fast growing and deep rooting ability of the poplar and willow species with their high phytstabilization and phytextraction efficiencies make these species excellent tools to remove B from the polluted waters. Utilization of these species for B removal in large scale CWs is quite possible which should be also investigated in further studies.
[Mh] Termos MeSH primário: Boro/isolamento & purificação
Poluição Ambiental/análise
Populus/metabolismo
Salix/metabolismo
Zonas Úmidas
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Boro/farmacocinética
Poluição Ambiental/prevenção & controle
Raízes de Plantas/química
Raízes de Plantas/crescimento & desenvolvimento
Solo/química
Águas Residuais/química
Poluentes Químicos da Água/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Waste Water); 0 (Water Pollutants, Chemical); N9E3X5056Q (Boron)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171217
[St] Status:MEDLINE


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[PMID]:29293569
[Au] Autor:Ding CJ; Liang LX; Diao S; Su XH; Zhang BY
[Ad] Endereço:State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China.
[Ti] Título:Genome-wide analysis of day/night DNA methylation differences in Populus nigra.
[So] Source:PLoS One;13(1):e0190299, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:DNA methylation is an important mechanism of epigenetic modification. Methylation changes during stress responses and developmental processes have been well studied; however, their role in plant adaptation to the day/night cycle is poorly understood. In this study, we detected global methylation patterns in leaves of the black poplar Populus nigra 'N46' at 8:00 and 24:00 by methylated DNA immunoprecipitation sequencing (MeDIP-seq). We found 10,027 and 10,242 genes to be methylated in the 8:00 and 24:00 samples, respectively. The methylated genes appeared to be involved in multiple biological processes, molecular functions, and cellular components, suggesting important roles for DNA methylation in poplar cells. Comparing the 8:00 and 24:00 samples, only 440 differentially methylated regions (DMRs) overlapped with genic regions, including 193 hyper- and 247 hypo-methylated DMRs, and may influence the expression of 137 downstream genes. Most hyper-methylated genes were associated with transferase activity, kinase activity, and phosphotransferase activity, whereas most hypo-methylated genes were associated with protein binding, ATP binding, and adenyl ribonucleotide binding, suggesting that different biological processes were activated during the day and night. Our results indicated that methylated genes were prevalent in the poplar genome, but that only a few of these participated in diurnal gene expression regulation.
[Mh] Termos MeSH primário: Ritmo Circadiano
Metilação de DNA
Genoma de Planta
Populus/genética
[Mh] Termos MeSH secundário: Adaptação Fisiológica
Escuridão
Imunoprecipitação
Luz
Folhas de Planta/metabolismo
Populus/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190299


  4 / 3141 MEDLINE  
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[PMID]:29265998
[Au] Autor:Li Y; Xu G; Lin C; Wang X; Piao CG
[Ad] Endereço:The Key Laboratory of State Forestry Administration on Forest Protection, Research Institute of Forest Ecology Environment and Protection, Chinese Academy of Forestry, Beijing 100091, PR China.
[Ti] Título:Aureimonas populi sp. nov., isolated from poplar tree bark.
[So] Source:Int J Syst Evol Microbiol;68(2):487-491, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Two novel bacterial strains (4M3-2 and 10-107-7) were isolated from poplar tree bark. The strains were Gram-stain-negative facultative aerobes, and produced short rods that were motile because of polar flagella. A phylogenetic tree was reconstructed based on 16S rRNA gene sequences indicating that the two novel strains are related to species of the genus Aureimonas and Aurantimonas. The two novel strains shared the highest 16S rRNA gene sequence similarities with Aureimonasfrigidaquae CW5 7Y-4 (97.1 %) and Aureimonasaltamirensis DSM 21988 (96.6 %)o. The lipids of the novel strain contain diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylmonomethylethanolamine, phosphatidylcholine and sulfoquinovosyl diacylglycerol. The presence of a distinct glycolipid (sulfoquinovosyl diacylglycerol) is an important chemotaxonomic feature used to distinguish between species of the genera, Aurantimonas and Aureimonas. Additionally, the DNA-DNA hybridization results indicated that the two novel strains represent a novel taxon distinct from Aureimonas frigidaquae. The results of the 16S rRNA gene sequence analysis, as well as the physiological and biochemical characteristics imply that the two novel strains should be assigned to a novel species, with the proposed name Aureimonas populi sp. nov. The type strain is 4M3-2 (=CFCC 11187 =KCTC 42087 ).
[Mh] Termos MeSH primário: Alphaproteobacteria/classificação
Filogenia
Casca de Planta/microbiologia
Populus/microbiologia
[Mh] Termos MeSH secundário: Alphaproteobacteria/genética
Alphaproteobacteria/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
China
DNA Bacteriano/genética
Glicolipídeos/química
Hibridização de Ácido Nucleico
Fosfolipídeos/química
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Glycolipids); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S)
[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:171222
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002479


  5 / 3141 MEDLINE  
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[PMID]:29247028
[Au] Autor:Deacon NJ; Grossman JJ; Schweiger AK; Armour I; Cavender-Bares J
[Ad] Endereço:Ecology, Evolution and Behavior, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Avenue, St. Paul, MN 55108 USA.
[Ti] Título:Genetic, morphological, and spectral characterization of relictual Niobrara River hybrid aspens ( × ).
[So] Source:Am J Bot;104(12):1878-1890, 2017 Dec.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: Aspen groves along the Niobrara River in Nebraska have long been a biogeographic curiosity due to morphological differences from nearby remnant populations. Pleistocene hybridization between and has been proposed, but the nearest populations are currently several hundred kilometers east. We tested the hybrid-origin hypothesis using genetic data and characterized putative hybrids phenotypically. METHODS: We compared nuclear microsatellite loci and chloroplast sequences of Niobrara River aspens to their putative parental species. Parental species and putative hybrids were also grown in a common garden for phenotypic comparison. On the common garden plants, we measured leaf morphological traits and leaf-level spectral reflectance profiles, from which chemical traits were derived. KEY RESULTS: The genetic composition of the three unique Niobrara aspen genotypes is consistent with the hybridization hypothesis and with maternal chloroplast inheritance from . Leaf margin dentition and abaxial pubescence differentiated taxa, with the hybrids showing intermediate values. Spectral profiles allowed statistical separation of taxa in short-wave infrared wavelengths, with hybrids showing intermediate values, indicating that traits associated with internal structure of leaves and water absorption may vary among taxa. However, reflectance values in the visible region did not differentiate taxa, indicating that traits related to pigments are not differentiated. CONCLUSIONS: Both genetic and phenotypic results support the hypothesis of a hybrid origin for these genetically unique aspens. However, low genetic diversity and ongoing ecological and climatic threats to the hybrid taxon present a challenge for conservation of these relictual boreal communities.
[Mh] Termos MeSH primário: Variação Genética
Hibridização Genética
Populus/anatomia & histologia
Populus/genética
[Mh] Termos MeSH secundário: Demografia
Genótipo
Repetições de Microssatélites
Nebraska
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180207
[Lr] Data última revisão:
180207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171217
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1700268


  6 / 3141 MEDLINE  
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[PMID]:29369585
[Au] Autor:Lebedeva MV; Levkoev EA; Volkov VA; Fetisova AA; Navalikhin SV; Shabunin DA; Danilov YI; Zhigunov AV; Potokin EK
[Ti] Título:[The recovering of breeding achievements of Populus × leningradensis bogd. and Populus × newensis bogd. Based on microsatellite analysis].
[So] Source:Genetika;52(10):1159-68, 2016 Oct.
[Is] ISSN:0016-6758
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The genotyping of 75 trees from poplar plantations in St. Petersburg and Leningrad oblast was conducted with microsatellite markers to identify the elite clonal varieties developed by P.L. Bogdanov in the period of 1938­1965. The information about the varieties was lost. The authentic herbarium specimens of poplar clonal varieties preserved at the St. Petersburg State Forest Technical University were used as reference genotypes. According to the results of DNA fingerprinting, we identified the clonal plantations of Populus × newesis Bogd. and Populus × leningradensis Bogd. from the Kartashevskii forest district and the arboretum of the St. Petersburg State Forest Technical University. The identified elite poplar hybrids have a higher frost resistant and a higher growth rate. They are recommended for plantation cultivation in the northwest of Russia.
[Mh] Termos MeSH primário: Aclimatação
Genótipo
Repetições de Microssatélites
Melhoramento Vegetal
Populus/genética
[Mh] Termos MeSH secundário: Técnicas de Genotipagem
Populus/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180205
[Lr] Data última revisão:
180205
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180126
[St] Status:MEDLINE


  7 / 3141 MEDLINE  
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[PMID]:29368835
[Au] Autor:Politov DV; Belokon MM; Belokon YS; Polyakova TA; Shatokhina AV; Mudrik EA; Khanov NA; Shestibratov KA
[Ti] Título:[Microsatellite analysis of clonality and individual heterozygosity in natural populations of aspen Populus tremula L.: Identification of highly heterozygous clone].
[So] Source:Genetika;52(6):728-32, 2016 Jun.
[Is] ISSN:0016-6758
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:Aspen Populus tremula L. (Salicaceae) is the fast-growing tree species of environmental and economic value. Aspen is capable of reproduction by both seeds and vegetative means, forming root sprouts. In an adult stand, identification of ramets of one clone among the trees of seed origin based on their morphology is difficult. A panel of 14 microsatellite loci developed for individual identification of aspen was applied for the clonal structure analysis in four natural aspen stands of the European part of Russia: Moscow and Voronezh oblasts, the Mari-El Republic, and the Republic of Tatarstan. In 52 trees from the Moscow sample, 41 multilocus genotypes were identified; in the Voronezh sample, among 30 individuals, 25 different genotypes were detected; and in the sample from Mari-El, 32 trees were represented by 13 genotypes. In the stand from Sabinsky Forestry, Tatarstan, all of the examined 29 trees were represented by a single genotype. The ancestral tree carrier of this genotype which was the most heterozygous (0.929) among all studied aspen individuals (sample mean, 0.598) obviously has spread over a large territory during several cutting and reproduction cycles, currently occupying the area of 2.2 ha. For aspen, usually suffering from Aspen trunk rot, such high viability is evidence of resistance to the main pathogens. The revealed superclone deserves further study with karyological methods and flow cytometry to determine ploidy level and analysis of the growth rate and the quality of wood for possible use in plantation forest production.
[Mh] Termos MeSH primário: Heterozigoto
Repetições de Microssatélites
Populus/genética
[Mh] Termos MeSH secundário: Genética Populacional
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180205
[Lr] Data última revisão:
180205
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180126
[St] Status:MEDLINE


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[PMID]:28453634
[Au] Autor:Pucholt P; Wright AE; Conze LL; Mank JE; Berlin S
[Ad] Endereço:Department of Plant Biology, Uppsala BioCenter, Linnean Centre for Plant Biology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
[Ti] Título:Recent Sex Chromosome Divergence despite Ancient Dioecy in the Willow Salix viminalis.
[So] Source:Mol Biol Evol;34(8):1991-2001, 2017 Aug 01.
[Is] ISSN:1537-1719
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Sex chromosomes can evolve when recombination is halted between a pair of chromosomes, and this can lead to degeneration of the sex-limited chromosome. In the early stages of differentiation sex chromosomes are homomorphic, and even though homomorphic sex chromosomes are very common throughout animals and plants, we know little about the evolutionary forces shaping these types of sex chromosomes. We used DNA- and RNA-Seq data from females and males to explore the sex chromosomes in the female heterogametic willow, Salix viminalis, a species with ancient dioecy but with homomorphic sex chromosomes. We detected no major sex differences in read coverage in the sex determination (SD) region, indicating that the W region has not significantly degenerated. However, single nucleotide polymorphism densities in the SD region are higher in females compared with males, indicating very recent recombination suppression, followed by the accumulation of sex-specific single nucleotide polymorphisms. Interestingly, we identified two female-specific scaffolds that likely represent W-chromosome-specific sequence. We show that genes located in the SD region display a mild excess of male-biased expression in sex-specific tissue, and we use allele-specific gene expression analysis to show that this is the result of masculinization of expression on the Z chromosome rather than degeneration of female-expression on the W chromosome. Together, our results demonstrate that insertion of small DNA fragments and accumulation of sex-biased gene expression can occur before the detectable decay of the sex-limited chromosome.
[Mh] Termos MeSH primário: Salix/genética
Cromossomos Sexuais/genética
[Mh] Termos MeSH secundário: Alelos
Evolução Biológica
Compensação de Dosagem (Genética)/genética
Expressão Gênica/genética
Regulação da Expressão Gênica de Plantas/genética
Variação Genética/genética
Genoma de Planta/genética
Plantas/genética
Populus/genética
Caracteres Sexuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180201
[Lr] Data última revisão:
180201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE
[do] DOI:10.1093/molbev/msx144


  9 / 3141 MEDLINE  
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[PMID]:28453813
[Au] Autor:Zhou D; Du Q; Chen J; Wang Q; Zhang D
[Ad] Endereço:Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, P.R. China.
[Ti] Título:Identification and allelic dissection uncover roles of lncRNAs in secondary growth of Populus tomentosa.
[So] Source:DNA Res;24(5):473-486, 2017 Oct 01.
[Is] ISSN:1756-1663
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Long non-coding RNAs (lncRNAs) function in various biological processes. However, their roles in secondary growth of plants remain poorly understood. Here, 15,691 lncRNAs were identified from vascular cambium, developing xylem, and mature xylem of Populus tomentosa with high and low biomass using RNA-seq, including 1,994 lncRNAs that were differentially expressed (DE) among the six libraries. 3,569 cis-regulated and 3,297 trans-regulated protein-coding genes were predicted as potential target genes (PTGs) of the DE lncRNAs to participate in biological regulation. Then, 476 and 28 lncRNAs were identified as putative targets and endogenous target mimics (eTMs) of Populus known microRNAs (miRNAs), respectively. Genome re-sequencing of 435 individuals from a natural population of P. tomentosa found 34,015 single nucleotide polymorphisms (SNPs) within 178 lncRNA loci and 522 PTGs. Single-SNP associations analysis detected 2,993 associations with 10 growth and wood-property traits under additive and dominance model. Epistasis analysis identified 17,656 epistatic SNP pairs, providing evidence for potential regulatory interactions between lncRNAs and their PTGs. Furthermore, a reconstructed epistatic network, representing interactions of 8 lncRNAs and 15 PTGs, might enrich regulation roles of genes in the phenylpropanoid pathway. These findings may enhance our understanding of non-coding genes in plants.
[Mh] Termos MeSH primário: Regulação da Expressão Gênica de Plantas
Polimorfismo de Nucleotídeo Único
Populus/metabolismo
Característica Quantitativa Herdável
RNA Longo não Codificante/fisiologia
[Mh] Termos MeSH secundário: Câmbio/genética
Câmbio/crescimento & desenvolvimento
Câmbio/metabolismo
Epistasia Genética
Estudos de Associação Genética
Populus/genética
Populus/crescimento & desenvolvimento
RNA Longo não Codificante/genética
RNA de Plantas/genética
RNA de Plantas/fisiologia
Análise de Sequência de DNA
Análise de Sequência de RNA
Transcriptoma
Xilema/genética
Xilema/crescimento & desenvolvimento
Xilema/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Long Noncoding); 0 (RNA, Plant)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180109
[Lr] Data última revisão:
180109
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE
[do] DOI:10.1093/dnares/dsx018


  10 / 3141 MEDLINE  
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[PMID]:28744731
[Au] Autor:Heroy KY; St Clair SB; Burritt EA; Villalba JJ
[Ad] Endereço:Department of Wildland Resources, Utah State University, Logan, 84322-5230, USA. Kristen.heroy@aggiemail.usu.edu.
[Ti] Título:Plant Community Chemical Composition Influences Trembling Aspen (Populus tremuloides) Intake by Sheep.
[So] Source:J Chem Ecol;43(8):817-830, 2017 Aug.
[Is] ISSN:1573-1561
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Nutrients and plant secondary compounds in aspen (Populus tremuloides) may interact with nutrients in the surrounding vegetation to influence aspen use by herbivores. Thus, this study aimed to determine aspen intake and preference by sheep in response to supplementary nutrients or plant secondary compounds (PSC) present in aspen trees. Thirty-two lambs were randomly assigned to one of four molasses-based supplementary feeds to a basal diet of tall fescue hay (N = 8) during three experiments. The supplements were as follows: (1) high-protein (60% canola meal), (2) a PSC (6% quebracho tannins), (3) 25% aspen bark, and (4) control (100% molasses). Supplements were fed from 0700 to 0900, then lambs were fed fresh aspen leaves collected from stands containing high (Experiment 1, 2) or low (Experiment 3) concentrations of phenolic glycosides (PG). In Experiment 2, lambs were simultaneously offered aspen, a forb (Lathyrus pauciflorus), and a grass (Bromus inermis) collected from the aspen understory. Animals supplemented with high protein or tannins showed greater intake of aspen leaves than animals supplemented with bark or the control diet (P < 0.05), likely because some condensed tannins have a positive effect on protein nutrition and protein aids in PSC detoxification. Overall, animals supplemented with bark showed the lowest aspen intake, suggesting PSC in bark and aspen leaves had additive inhibitory effects on intake. In summary, these results suggest that not only the concentration but also the types and proportions of nutrients and chemical defenses available in the plant community influence aspen use by herbivores.
[Mh] Termos MeSH primário: Dieta
Populus/química
[Mh] Termos MeSH secundário: Animais
Cromatografia Líquida de Alta Pressão
Glicosídeos/análise
Glicosídeos/farmacologia
Herbivoria/efeitos dos fármacos
Casca de Planta/química
Casca de Planta/metabolismo
Folhas de Planta/química
Folhas de Planta/metabolismo
Proteínas de Plantas/farmacologia
Populus/metabolismo
Ovinos
Espectrofotometria
Taninos/análise
Taninos/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Glycosides); 0 (Plant Proteins); 0 (Tannins)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171229
[Lr] Data última revisão:
171229
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170727
[St] Status:MEDLINE
[do] DOI:10.1007/s10886-017-0872-6



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