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Pesquisa : B01.650.940.800.575.912.063 [Categoria DeCS]
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[PMID]:28958725
[Au] Autor:Gomes MP; de Brito JCM; Carvalho Carneiro MML; Ribeiro da Cunha MR; Garcia QS; Figueredo CC
[Ad] Endereço:Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Botânica, Avenida Antônio Carlos, 6627, Pampulha, Caixa Postal 486, 31270-970, Belo Horizonte, Minas Gerais, Brazil; Universidade Federal do Paraná, Setor de Ciências Biológicas, Departamento de Botânica, Avenida
[Ti] Título:Responses of the nitrogen-fixing aquatic fern Azolla to water contaminated with ciprofloxacin: Impacts on biofertilization.
[So] Source:Environ Pollut;232:293-299, 2018 Jan.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We investigated the ability of the aquatic fern Azolla to take up ciprofloxacin (Cipro), as well as the effects of that antibiotic on the N-fixing process in plants grown in medium deprived (-N) or provided (+N) with nitrogen (N). Azolla was seen to accumulate Cipro at concentrations greater than 160 µg g dry weight when cultivated in 3.05 mg Cipro l , indicating it as a candidate for Cipro recovery from water. Although Cipro was not seen to interfere with the heterocyst/vegetative cell ratios, the antibiotic promoted changes with carbon and nitrogen metabolism in plants. Decreased photosynthesis and nitrogenase activity, and altered plant's amino acid profile, with decreases in cell N concentrations, were observed. The removal of N from the growth medium accentuated the deleterious effects of Cipro, resulting in lower photosynthesis, N-fixation, and assimilation rates, and increased hydrogen peroxide accumulation. Our results shown that Cipro may constrain the use of Azolla as a biofertilizer species due to its interference with nitrogen fixation processes.
[Mh] Termos MeSH primário: Antibacterianos/toxicidade
Ciprofloxacino/toxicidade
Gleiquênias/fisiologia
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Gleiquênias/crescimento & desenvolvimento
Nitrogênio/metabolismo
Fixação de Nitrogênio
Fotossíntese/efeitos dos fármacos
Testes de Toxicidade
Água/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 5E8K9I0O4U (Ciprofloxacin); N762921K75 (Nitrogen)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180122
[Lr] Data última revisão:
180122
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170930
[St] Status:MEDLINE


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[PMID]:28953931
[Au] Autor:Carins Murphy MR; Jordan GJ; Brodribb TJ
[Ad] Endereço:School of Biological Sciences, University of Tasmania, Hobart, Tasmania, Australia.
[Ti] Título:Ferns are less dependent on passive dilution by cell expansion to coordinate leaf vein and stomatal spacing than angiosperms.
[So] Source:PLoS One;12(9):e0185648, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Producing leaves with closely spaced veins is a key innovation linked to high rates of photosynthesis in angiosperms. A close geometric link between veins and stomata in angiosperms ensures that investment in enhanced venous water transport provides the strongest net carbon return to the plant. This link is underpinned by "passive dilution" via expansion of surrounding cells. However, it is not known whether this 'passive dilution' mechanism is present in plant lineages other than angiosperms and is another key feature of the angiosperms' evolutionary success. Consequently, we sought to determine whether the 'passive dilution' mechanism is; (i) exclusive to the angiosperms, (ii) a conserved mechanism that evolved in the common ancestor of ferns and angiosperms, or (iii) has evolved continuously over time. To do this we first we assessed the plasticity of vein and stomatal density and epidermal cell size in ferns in response to light environment. We then compared the relationships between these traits found among ferns with modelled relationships that assume vein and stomatal density respond passively to epidermal cell expansion, and with those previously observed in angiosperms. Vein density, stomatal density and epidermal cell size were linked in ferns with remarkably similar relationships to those observed in angiosperms, except that fern leaves had fewer veins per stomata. However, plasticity was limited in ferns and stomatal spacing was dependent on active stomatal differentiation as well as passive cell expansion. Thus, ferns (like angiosperms) appear to coordinate vein and stomatal density with epidermal cell expansion to some extent to maintain a constant ratio between veins and stomata in the leaf. The different general relationships between vein density and stomatal density in ferns and angiosperms suggests the groups have different optimum balances between the production of vein tissue dedicated to water supply and stomatal tissue for gas exchange.
[Mh] Termos MeSH primário: Gleiquênias/fisiologia
Magnoliopsida/fisiologia
Folhas de Planta/fisiologia
Estômatos de Plantas/fisiologia
[Mh] Termos MeSH secundário: Gleiquênias/citologia
[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:170928
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185648


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[PMID]:28945775
[Au] Autor:Chen J; Huang M; Cao F; Pardha-Saradhi P; Zou Y
[Ad] Endereço:Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, Changsha, China.
[Ti] Título:Urea application promotes amino acid metabolism and membrane lipid peroxidation in Azolla.
[So] Source:PLoS One;12(9):e0185230, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A pot experiment was conducted to evaluate the effect of urea on nitrogen metabolism and membrane lipid peroxidation in Azolla pinnata. Compared to controls, the application of urea to A. pinnata resulted in a 44% decrease in nitrogenase activity, no significant change in glutamine synthetase activity, 660% higher glutamic-pyruvic transaminase, 39% increase in free amino acid levels, 22% increase in malondialdehyde levels, 21% increase in Na+/K+- levels, 16% increase in Ca2+/Mg2+-ATPase levels, and 11% decrease in superoxide dismutase activity. In terms of H2O2 detoxifying enzymes, peroxidase activity did not change and catalase activity increased by 64% in urea-treated A. pinnata. These findings suggest that urea application promotes amino acid metabolism and membrane lipid peroxidation in A. pinnata.
[Mh] Termos MeSH primário: Gleiquênias/efeitos dos fármacos
Gleiquênias/metabolismo
Peroxidação de Lipídeos/efeitos dos fármacos
Ureia/farmacologia
[Mh] Termos MeSH secundário: Aminoácidos/metabolismo
ATPase de Ca(2+) e Mg(2+)/metabolismo
Catalase/metabolismo
Gleiquênias/crescimento & desenvolvimento
Peróxido de Hidrogênio/metabolismo
Malondialdeído/metabolismo
Lipídeos de Membrana/metabolismo
Nitrogênio/metabolismo
ATPase Trocadora de Sódio-Potássio/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amino Acids); 0 (Membrane Lipids); 4Y8F71G49Q (Malondialdehyde); 8W8T17847W (Urea); BBX060AN9V (Hydrogen Peroxide); EC 1.11.1.6 (Catalase); EC 3.6.1.- (Ca(2+) Mg(2+)-ATPase); EC 3.6.3.9 (Sodium-Potassium-Exchanging ATPase); N762921K75 (Nitrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170926
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185230


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[PMID]:28691403
[Au] Autor:Wu CF; Lin YS; Lee SC; Chen CY; Wu MC; Lin JS
[Ad] Endereço:Department of Food Science, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan.
[Ti] Título:Effects of Davallia formosana Hayata Water and Alcohol Extracts on Osteoblastic MC3T3-E1 Cells.
[So] Source:Phytother Res;31(9):1349-1356, 2017 Sep.
[Is] ISSN:1099-1573
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The Taiwanese native fern Davallia formosana Hayata (DFH) is used to treat bone diseases in classical Chinese medicine. We analyzed MC3T3E1 osteoblasts treated with different concentrations of water and ethanol extracts (10, 25, and 50 [both], and 100 µg/mL [DFE only]) using cell viability, expression of osteoblast differentiation markers [bone morphogenetic protein 2 (BMP-2), collagen 1 (CoL-1), alkaline phosphatase (ALP), and Runt-related transcription factor 2 (Runx 2)], and mineralization. These were significantly increased by DFW or DFE after 24-h incubation compared with the untreated controls. Compared with other treatments, DFW 50 and DFE 100 µg/mL significantly increased MC3T3E1 cell survival. DFW 25 and 50 µg/mL increased bone BMP-2, CoL-1, ALP, and Runx2 protein expression, ALP activity, and mineralization more than DFE did. Repeated chromatographic separation of DFW yielded compound (-)-epicatechin-3-O-d-allipyranoside (ECAP), which was characterized using H and C nuclear magnetic resonance spectroscopy. (-)-Epicatechin-3-O-d-allipyranoside (0.01 µg/mL) significantly increased cell survival (118.9%) and mineralization (218.7%) compared with that of the control treatment. We inferred that ECAP could mediate the main activity of DFW in bone formation, likely through BMP-2-induced Runx2 transcription, which increased bone cell differentiation factors ALP and CoL-1 and promoted mineralization. (-)-Epicatechin-3-O-d-allipyranoside could be an anti-osteoporotic agent. Copyright © 2017 John Wiley & Sons, Ltd.
[Mh] Termos MeSH primário: Catequina/análogos & derivados
Gleiquênias/química
Glicosídeos/farmacologia
Osteoblastos/efeitos dos fármacos
Extratos Vegetais/farmacologia
[Mh] Termos MeSH secundário: Células 3T3
Fosfatase Alcalina/metabolismo
Animais
Proteína Morfogenética Óssea 2/metabolismo
Catequina/farmacologia
Diferenciação Celular/efeitos dos fármacos
Sobrevivência Celular
Colágeno Tipo I/metabolismo
Subunidade alfa 1 de Fator de Ligação ao Core/metabolismo
Camundongos
Osteogênese/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bmp2 protein, mouse); 0 (Bone Morphogenetic Protein 2); 0 (Collagen Type I); 0 (Core Binding Factor Alpha 1 Subunit); 0 (Glycosides); 0 (Plant Extracts); 0 (Runx2 protein, mouse); 0 (epicatechin-3-O-allopyranoside); 8R1V1STN48 (Catechin); EC 3.1.3.1 (Alkaline Phosphatase)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170925
[Lr] Data última revisão:
170925
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170711
[St] Status:MEDLINE
[do] DOI:10.1002/ptr.5860


  5 / 1057 MEDLINE  
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[PMID]:28633101
[Au] Autor:Árvay J; Demková L; Hauptvogl M; Michalko M; Bajcan D; Stanovic R; Tomás J; Hrstková M; Trebichalský P
[Ad] Endereço:Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia. Electronic address: julius.arvay@gmail.com.
[Ti] Título:Assessment of environmental and health risks in former polymetallic ore mining and smelting area, Slovakia: Spatial distribution and accumulation of mercury in four different ecosystems.
[So] Source:Ecotoxicol Environ Saf;144:236-244, 2017 Oct.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Former long-term mining and smelting of pollymetallic ores in the Middle Spis area caused a serious contamination problem of the environment with heavy metals and metalloids, especially mercury (Hg). Several studies have reported concentration of Hg in the area but this paper provides first detailed characterization of Hg contamination of different environmental components in agricultural, forest, grassland and urban ecosystems. The ecosystems are in different distances from emission sources - former mercury and copper smelting plants in NE Slovakia. Total Hg content was studied in soil/substrate samples (n = 234) and characteristic biological samples (Athyrium filix-femina (L.) Roth, Macrolepiota procera (Scop.) Singer, Boletus edulis Bull., Cyanoboletus pulverulentus (Opat.) Gelardi, Vizzini & Simonini, Triticum aestivum (L.), Poa pratensis (L.)) (n = 234) collected in the above-mentioned ecosystems. The level of contamination and environmental risks were assessed by contamination factor (C ), index of geoaccumulation (I ) and potential environmental risk index (PER). To determine the level of transition of Hg from abiotic to biotic environment, bioconcentration factor (BCF) was used. To determine a health risk resulting from regular and long-term consumption of the locally available species, the results of the Hg content were compared with the Provisional Tolerable Weekly Intake (PTWI) for Hg defined by World Health Organization. The results suggest that almost 63% of the area belong to the very high risk category and 80% of the sampling sites shown very high contamination factor. Geoaccumulation index showed that almost 30% of the area is very strongly contaminated and only 8% is not contaminated with Hg. Spearman's correlation relationship confirmed that the values of PER, BCF, C and I decreased with an increasing distance from the pollution source. The percentage of contribution to PTWI ranged between 5.76-69.0% for adults and 11.5-138% for children. Mushroom M. procera showed the highest %PTWI among the tested biological samples. Studied ecotoxicological parameters showed high level of health risk for population living in the area. Consumption of the crops grown in the area and mainly edible wild mushrooms might negatively affect the health of the consumers in the long-term.
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Mercúrio/análise
Mineração
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Agaricales/química
Cobre/análise
Produtos Agrícolas/química
Ecossistema
Gleiquênias/química
Seres Humanos
Medição de Risco
Eslováquia
Verduras/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants); 789U1901C5 (Copper); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171110
[Lr] Data última revisão:
171110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170621
[St] Status:MEDLINE


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[PMID]:28521788
[Au] Autor:Zakaria ZA; Kamisan FH; Omar MH; Mahmood ND; Othman F; Abdul Hamid SS; Abdullah MNH
[Ad] Endereço:Halal Product Research Institute, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia. zaz@upm.edu.my.
[Ti] Título:Methanol extract of Dicranopteris linearis L. leaves impedes acetaminophen-induced liver intoxication partly by enhancing the endogenous antioxidant system.
[So] Source:BMC Complement Altern Med;17(1):271, 2017 May 18.
[Is] ISSN:1472-6882
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The present study investigated the potential of methanolic extract of Dicranopteris linearis (MEDL) leaves to attenuate liver intoxication induced by acetaminophen (APAP) in rats. METHODS: A group of mice (n = 5) treated orally with a single dose (5000 mg/kg) of MEDL was first subjected to the acute toxicity study using the OECD 420 model. In the hepatoprotective study, six groups of rats (n = 6) were used and each received as follows: Group 1 (normal control; pretreated with 10% DMSO (extract's vehicle) followed by treatment with 10% DMSO (hepatotoxin's vehicle) (10% DMSO +10% DMSO)), Group 2 (hepatotoxic control; 10% DMSO +3 g/kg APAP (hepatotoxin)), Group 3 (positive control; 200 mg/kg silymarin +3 g/kg APAP), Group 4 (50 mg/kg MEDL +3 g/kg APAP), Group 5 (250 mg/kg MEDL +3 g/kg APAP) or Group 6 (500 mg/kg MEDL +3 g/kg APAP). The test solutions pre-treatment were made orally once daily for 7 consecutive days, and 1 h after the last test solutions administration (on Day 7th), the rats were treated with vehicle or APAP. Blood were collected from those treated rats for biochemical analyses, which were then euthanized to collect their liver for endogenous antioxidant enzymes determination and histopathological examination. The extract was also subjected to in vitro anti-inflammatory investigation and, HPLC and GCMS analyses. RESULTS: Pre-treatment of rats (Group 2) with 10% DMSO failed to attenuate the toxic effect of APAP on the liver as seen under the microscopic examination. This observation was supported by the significant (p < 0.05) increased in the level of serum liver enzymes of alanine transaminase (ALT), aspartate transaminase (AST) and alkaline phosphatase (ALP), and significant (p < 0.05) decreased in the activity of endogenous antioxidant enzymes of catalase (CAT) and superoxide dismutase (SOD) in comparison to Group 1. Pre-treatment with MEDL, at all doses, significantly (p < 0.05) reduced the level of ALT and AST while the levels of CAT and SOD was significantly (p < 0.05) restored to their normal value. Histopathological studies showed remarkable improvement in the liver cells architecture with increase in dose of the extract. MEDL also demonstrated a low to none inhibitory activity against the respective LOX- and NO-mediated inflammatory activity. The HPLC and GCMS analyses of MEDL demonstrated the presence of several non-volatile (such as rutin, gallic acid etc.) and volatile (such as methyl palmitate, shikimic acid etc.) bioactive compounds. CONCLUSION: MEDL exerts hepatoprotective activity against APAP-induced intoxication possibly via its ability to partly activate the endogenous antioxidant system and presence of various volatile and non-volatile bioactive compounds that might act synergistically to enhance the hepatoprotective effect.
[Mh] Termos MeSH primário: Acetaminofen/efeitos adversos
Antioxidantes/metabolismo
Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico
Gleiquênias/química
Extratos Vegetais/administração & dosagem
[Mh] Termos MeSH secundário: Alanina Transaminase/sangue
Animais
Aspartato Aminotransferases/sangue
Catalase/metabolismo
Doença Hepática Induzida por Substâncias e Drogas/etiologia
Doença Hepática Induzida por Substâncias e Drogas/metabolismo
Feminino
Seres Humanos
Fígado/efeitos dos fármacos
Fígado/enzimologia
Masculino
Folhas de Planta/química
Ratos
Ratos Sprague-Dawley
Superóxido Dismutase/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Plant Extracts); 362O9ITL9D (Acetaminophen); EC 1.11.1.6 (Catalase); EC 1.15.1.1 (Superoxide Dismutase); EC 2.6.1.1 (Aspartate Aminotransferases); EC 2.6.1.2 (Alanine Transaminase)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170821
[Lr] Data última revisão:
170821
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170520
[St] Status:MEDLINE
[do] DOI:10.1186/s12906-017-1781-5


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[PMID]:28498121
[Au] Autor:Ferreira RM; Domingues ALC; Takase I; Stapelfeldt DMA
[Ad] Endereço:Graduate Program in Environmental Science and Conservation, Federal University of Rio de Janeiro, Macaé, RJ, Brazil E-mail: rachelmoraes@hotmail.com.br.
[Ti] Título:Studies of selective adsorption, desorption and reuse of chemically altered biomass produced from aquatic macrophytes for treatment of metal-containing wastewater.
[So] Source:Water Sci Technol;75(9-10):2083-2093, 2017 May.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aquatic macrophytes Salvinia sp. and Pistia stratiotes have a natural capacity to adsorb various elements, including heavy metals. This capacity was enhanced with a chemical treatment using NaOH alkaline solution for Salvinia sp. and a mixture of both Salvinia sp. and Pistia stratiotes at a proportion of 1:1, whose respective biosorbents were called SSOH and MBOH. Adsorption tests were done in a ternary system containing the metals copper, lead and manganese; the parameters considered were: starting concentration, kinetics, pH and temperature. The adsorption isotherms for SSOH had a maximum adsorptive capacity of 50.20, 53.85 and 14.68 mg g for Cu, Pb and Mn, respectively; for MBOH, maximum values were 44.62, 35.17 and 15.74 mg g for Cu, Pb and Mn, respectively. The metals displayed different behaviors with pH variation. The results also showed an adsorption preference of Cu > Pb > Mn for SSOH. Desorption and readsorption studies were also carried out, showing 100% desorption and increased adsorption capacity in readsorption tests. Surface area and porosity analysis with the Brunauer-Emmett-Teller (BET) method indicate that after chemical modification, MBOH and SSOH biomasses had their surface increased in comparison to SS, with values of 165.5657 (MBOH), 157.4392 (SSOH) and 78.9432 m g (SS).
[Mh] Termos MeSH primário: Araceae/química
Biomassa
Gleiquênias/química
Metais Pesados
Águas Residuais/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Adsorção
Concentração de Íons de Hidrogênio
Cinética
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Waste Water); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170914
[Lr] Data última revisão:
170914
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170513
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2017.090


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[PMID]:28494025
[Au] Autor:Berruezo F; de Souza FSJ; Picca PI; Nemirovsky SI; Martínez Tosar L; Rivero M; Mentaberry AN; Zelada AM
[Ad] Endereço:Laboratorio de Agrobiotecnología, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
[Ti] Título:Sequencing of small RNAs of the fern Pleopeltis minima (Polypodiaceae) offers insight into the evolution of the microrna repertoire in land plants.
[So] Source:PLoS One;12(5):e0177573, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:MicroRNAs (miRNAs) are short, single stranded RNA molecules that regulate the stability and translation of messenger RNAs in diverse eukaryotic groups. Several miRNA genes are of ancient origin and have been maintained in the genomes of animal and plant taxa for hundreds of millions of years, playing key roles in development and physiology. In the last decade, genome and small RNA (sRNA) sequencing of several plant species have helped unveil the evolutionary history of land plants. Among these, the fern group (monilophytes) occupies a key phylogenetic position, as it represents the closest extant cousin taxon of seed plants, i.e. gymno- and angiosperms. However, in spite of their evolutionary, economic and ecological importance, no fern genome has been sequenced yet and few genomic resources are available for this group. Here, we sequenced the small RNA fraction of an epiphytic South American fern, Pleopeltis minima (Polypodiaceae), and compared it to plant miRNA databases, allowing for the identification of miRNA families that are shared by all land plants, shared by all vascular plants (tracheophytes) or shared by euphyllophytes (ferns and seed plants) only. Using the recently described transcriptome of another fern, Lygodium japonicum, we also estimated the degree of conservation of fern miRNA targets in relation to other plant groups. Our results pinpoint the origin of several miRNA families in the land plant evolutionary tree with more precision and are a resource for future genomic and functional studies of fern miRNAs.
[Mh] Termos MeSH primário: Evolução Molecular
Gleiquênias/genética
MicroRNAs/genética
RNA de Plantas/genética
Análise de Sequência de RNA/métodos
[Mh] Termos MeSH secundário: Sequência de Bases
Sequência Conservada/genética
MicroRNAs/metabolismo
Filogenia
RNA Mensageiro/genética
RNA Mensageiro/metabolismo
RNA de Plantas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (MicroRNAs); 0 (RNA, Messenger); 0 (RNA, Plant)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170911
[Lr] Data última revisão:
170911
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170512
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0177573


  9 / 1057 MEDLINE  
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[PMID]:28493884
[Au] Autor:Blair DP; Blanchard W; Banks SC; Lindenmayer DB
[Ad] Endereço:Fenner School of Environment and Society, The Australian National University, Canberra, Australian Capital Territory, Australia.
[Ti] Título:Non-linear growth in tree ferns, Dicksonia antarctica and Cyathea australis.
[So] Source:PLoS One;12(5):e0176908, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Tree ferns are an important structural component of forests in many countries. However, because their regeneration is often unrelated to major disturbances, their age is often difficult to determine. In addition, rates of growth may not be uniform, which further complicates attempts to determine their age. In this study, we measured 5 years of growth of Cyathea australis and Dicksonia antarctica after a large wildfire in 2009 in south-eastern Australia. We found growth rates of these two species were unaffected by aspect and elevation but slope had a minor effect with D. antarctica growing 0.3mm faster for each additional degree of slope. Geographic location influenced growth in both species by up to 12 - 14mm/yr. The most consistent factor influencing growth rate, however, was initial height at the time of the 2009 fire; a finding consistent in both species and all geographic locations. For both tree fern species, individuals that were taller at the commencement of the study had greater overall growth for the duration of the study. This effect did not decrease even among the tallest tree ferns in our study (up to 6 metres tall). Overall, Cyathea australis averaged 73 (± 22)mm/year of growth (± 1SD), with the rate increasing 5mm/yr per metre of additional height. Dicksonia antarctica averaged 33 (± 13)mm/year, increasing by 6mm/yr/m. Growth rates dependent on initial height were unexpected and we discuss possible reasons for this finding. Variable growth rates also suggest that common age estimation methods of dividing height by average growth rate are likely to underestimate the age of short tree ferns, while overestimating the age of tall tree ferns, particularly if they have been subject to a fire.
[Mh] Termos MeSH primário: Gleiquênias/crescimento & desenvolvimento
Árvores/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Fogo
Florestas
Modelos Biológicos
Dinâmica não Linear
Austrália do Sul
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170919
[Lr] Data última revisão:
170919
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170512
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0176908


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[PMID]:28428200
[Au] Autor:Schmitt M; Mehltreter K; Sundue M; Testo W; Watanabe T; Jansen S
[Ad] Endereço:Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11 D-89081 Ulm, Germany marco.schmitt@me.com.
[Ti] Título:The evolution of aluminum accumulation in ferns and lycophytes.
[So] Source:Am J Bot;104(4):573-583, 2017 Apr.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: This paper investigates the occurrence and evolution of aluminum (Al) accumulation within ferns and lycophytes, which is characterized by Al concentrations above 1000 mg·kg in aboveground plant tissues. We hypothesize that this feature is more common in ferns than in angiosperms, and potentially correlated with growth form and other chemical elements. METHODS: Aluminum concentrations were obtained from novel analyses and literature for a total of 354 specimens and 307 species. Moreover, a semiquantitative aluminon test was applied for a subset of 105 species and validated against exact Al measurements. KEY RESULTS: Molecular phylogenetic analyses showed that the major Al-accumulating groups were primarily found in the Gleicheniales and Cyatheales, and largely absent in the Polypodiales. At the species and generic level, Al accumulation was typically either absent or present, and mixed results within a single species and genus were limited to less than 30% of the species and genera tested. Epiphytic ferns had significantly lower Al levels than terrestrial ferns, although this finding was not significant after phylogenetic correction. In addition, a significant, positive correlation was found between Al and iron, while Al was negatively correlated with phosphorus and potassium concentrations. CONCLUSIONS: Aluminum accumulation is most common outside of the Polypodiales and occurs in 38% of the species studied, indicating that this trait is indeed common within subtropical and tropical ferns, a finding that could be in line with their role as pioneer species on landslides and soils with high levels of soluble Al.
[Mh] Termos MeSH primário: Alumínio/metabolismo
Evolução Biológica
Gleiquênias/metabolismo
[Mh] Termos MeSH secundário: Alumínio/análise
Gleiquênias/química
Gleiquênias/genética
Fósforo/análise
Filogenia
Potássio/análise
Pteridófitas/química
Pteridófitas/genética
Pteridófitas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
27YLU75U4W (Phosphorus); CPD4NFA903 (Aluminum); RWP5GA015D (Potassium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170422
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1600381



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