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  1 / 1208 MEDLINE  
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[PMID]:28963347
[Au] Autor:Kroll K; Holland CK; Starks CM; Jez JM
[Ad] Endereço:Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, U.S.A.
[Ti] Título:Evolution of allosteric regulation in chorismate mutases from early plants.
[So] Source:Biochem J;474(22):3705-3717, 2017 Nov 01.
[Is] ISSN:1470-8728
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Plants, fungi, and bacteria synthesize the aromatic amino acids: l-phenylalanine, l-tyrosine, and l-tryptophan. Chorismate mutase catalyzes the branch point reaction of phenylalanine and tyrosine biosynthesis to generate prephenate. In , there are two plastid-localized chorismate mutases that are allosterically regulated (AtCM1 and AtCM3) and one cytosolic isoform (AtCM2) that is unregulated. Previous analysis of plant chorismate mutases suggested that the enzymes from early plants (i.e. bryophytes/moss, lycophytes, and basal angiosperms) formed a clade distinct from the isoforms found in flowering plants; however, no biochemical information on these enzymes is available. To understand the evolution of allosteric regulation in plant chorismate mutases, we analyzed a basal lineage of plant enzymes homologous to AtCM1 based on sequence similarity. The chorismate mutases from the moss/bryophyte (PpCM1 and PpCM2), the lycophyte (SmCM), and the basal angiosperm (AmtCM1 and AmtCM2) were characterized biochemically. Tryptophan was a positive effector for each of the five enzymes examined. Histidine was a weak positive effector for PpCM1 and AmtCM1. Neither tyrosine nor phenylalanine altered the activity of SmCM; however, tyrosine was a negative regulator of the other four enzymes. Phenylalanine down-regulates both moss enzymes and AmtCM2. The 2.0 ŠX-ray crystal structure of PpCM1 in complex with the tryptophan identified the allosteric effector site and reveals structural differences between the R- (more active) and T-state (less active) forms of plant chorismate mutases. Molecular insight into the basal plant chorismate mutases guides our understanding of the evolution of allosteric regulation in these enzymes.
[Mh] Termos MeSH primário: Bryopsida
Corismato Mutase/química
Corismato Mutase/genética
Extratos Vegetais/química
Extratos Vegetais/genética
Selaginellaceae
[Mh] Termos MeSH secundário: Regulação Alostérica/fisiologia
Sequência de Aminoácidos
Arabidopsis
Corismato Mutase/isolamento & purificação
Cristalografia por Raios X/métodos
Evolução Molecular
Extratos Vegetais/isolamento & purificação
Estrutura Secundária de Proteína
Estrutura Terciária de Proteína
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts); EC 5.4.99.5 (Chorismate Mutase)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171108
[Lr] Data última revisão:
171108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171001
[St] Status:MEDLINE
[do] DOI:10.1042/BCJ20170549


  2 / 1208 MEDLINE  
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[PMID]:28783339
[Au] Autor:Waterman MJ; Nugraha AS; Hendra R; Ball GE; Robinson SA; Keller PA
[Ti] Título:Antarctic Moss Biflavonoids Show High Antioxidant and Ultraviolet-Screening Activity.
[So] Source:J Nat Prod;80(8):2224-2231, 2017 Aug 25.
[Is] ISSN:1520-6025
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ceratodon purpureus is a cosmopolitan moss that survives some of the harshest places on Earth: from frozen Antarctica to hot South Australian deserts. In a study on the survival mechanisms of the species, nine compounds were isolated from Australian and Antarctic C. purpureus. This included five biflavonoids, with complete structural elucidation of 1 and 2 reported here for the first time, as well as an additional four known phenolic compounds. Dispersion-corrected DFT calculations suggested a rotational barrier, leading to atropisomerism, resulting in the presence of diastereomers for compound 2. All isolates absorbed strongly in the ultraviolet (UV) spectrum, e.g., biflavone 1 (UV-A, 315-400 nm), which displayed the strongest radical-scavenging activity, 13% more efficient than the standard rutin; p-coumaric acid and trans-ferulic acid showed the highest UV-B (280-315 nm) absorption. The more complex and abundant 1 and 2 presumably have dual roles as both UV-screening and antioxidant compounds. They are strongly bound to Antarctic moss cell walls as well as located inside the cells of moss from both locations. The combined high stability and photoprotective abilities of these isolates may account for the known resilience of this species to UV-B radiation and its survival in some of the toughest locations in the world.
[Mh] Termos MeSH primário: Antioxidantes/farmacologia
Biflavonoides/isolamento & purificação
Biflavonoides/farmacologia
Briófitas/química
Bryopsida/química
Ácidos Cumáricos/química
Fenóis/sangue
[Mh] Termos MeSH secundário: Regiões Antárticas
Antioxidantes/química
Austrália
Biflavonoides/química
Estrutura Molecular
Propionatos
Raios Ultravioleta
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Biflavonoids); 0 (Coumaric Acids); 0 (Phenols); 0 (Propionates); AVM951ZWST (ferulic acid); IBS9D1EU3J (trans-3-(4'-hydroxyphenyl)-2-propenoic acid)
[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:170808
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jnatprod.7b00085


  3 / 1208 MEDLINE  
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[PMID]:28623799
[Au] Autor:Milicevic T; Anicic Urosevic M; Vukovic G; Skrivanj S; Relic D; Frontasyeva MV; Popovic A
[Ad] Endereço:Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia.
[Ti] Título:Assessment of species-specific and temporal variations of major, trace and rare earth elements in vineyard ambient using moss bags.
[So] Source:Ecotoxicol Environ Saf;144:208-215, 2017 Oct.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Since the methodological parameters of moss bag biomonitoring have rarely been investigated for the application in agricultural areas, two mosses, Sphagnum girgensohnii (a species of the most recommended biomonitoring genus) and Hypnum cupressiforme (commonly available), were verified in a vineyard ambient. The moss bags were exposed along transects in six vineyard parcels during the grapevine season (March‒September 2015). To select an appropriate period for the reliable 'signal' of the element enrichment in the mosses, the bags were simultaneously exposed during five periods (3 × 2 months, 1 × 4 months, and 1 × 6 months). Assuming that vineyard is susceptible to contamination originated from different agricultural treatments, a wide range of elements (41) were determined in the moss and topsoil samples. The mosses were significantly enriched by the elements during the 2-month bag exposure which gradually increasing up to 6 months, but Cu and Ni exhibited the noticeable fluctuations during the grapevine season. However, the 6-month exposure of moss bags could be recommended for comparative studies among different vineyards because it reflects the ambient pollution comprising unpredictable treatments of grapevine applied during the whole season. Although higher element concentrations were determined in S. girgensohnii than H. cupressiforme, both species reflected the spatio-temporal changes in the ambient element content. Moreover, the significant correlation of the element (Cr, Cu, Sb, and Ti) concentrations between the mosses, and the same pairs of the elements correlated within the species, imply the comparable use of S. girgensohnii and H. cupressiforme in the vineyard (agricultural) ambient. Finally, both the moss bags and the soil analyses suggest that vineyard represents a dominant diffuse pollution source of As, Cr, Cu, Ni, Fe, and V.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Bryopsida/química
Monitoramento Ambiental/métodos
Metais Terras Raras/análise
Sphagnopsida/química
Oligoelementos/análise
[Mh] Termos MeSH secundário: Fazendas
Estações do Ano
Sérvia
Especificidade da Espécie
Vitis/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Metals, Rare Earth); 0 (Trace Elements)
[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:170618
[St] Status:MEDLINE


  4 / 1208 MEDLINE  
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[PMID]:28609099
[Au] Autor:Zhang PL; Han Y; Zhang LT; Wang XL; Shen T; Ren D; Lou H; Wang XN
[Ad] Endereço:Key Laboratory of Chemical Biology (Ministry of Education), Department of Natural Product Chemistry, School of Pharmaceutical Sciences, Shandong University , 44 West Wenhua Road, Jinan 250012, People's Republic of China.
[Ti] Título:Botrysphones A-C and Botrysphins A-F, Triketides and Diterpenoids from the Fungus Botrysphaeria laricina.
[So] Source:J Nat Prod;80(6):1791-1797, 2017 Jun 23.
[Is] ISSN:1520-6025
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Three new triketides, botrysphones A-C (1-3) and six new isopimarane-type diterpenoids, botrysphins A-F (4-9), together with the known triketides sphaeropsidone (10) and chlorosphaeropsidone (11) and diterpenoids sphaeropsidins A and B (12 and 13), were obtained from culture of the fungus Botrysphaeria laricina associated with the moss Rhodobryum umgiganteum. The structures of the new compounds were established on the basis of extensive spectroscopic techniques including HRMS and 1D and 2D NMR data. Compounds 7 and 12 showed significant quinone reductase inducing activity in Hepa 1c1c7 cells.
[Mh] Termos MeSH primário: Bryopsida/química
Diterpenos/isolamento & purificação
[Mh] Termos MeSH secundário: Animais
Antineoplásicos Fitogênicos/química
China
Diterpenos/química
Diterpenos/farmacologia
Ensaios de Seleção de Medicamentos Antitumorais
Medicamentos de Ervas Chinesas/química
Camundongos
Estrutura Molecular
NAD(P)H Desidrogenase (Quinona)/antagonistas & inibidores
Ressonância Magnética Nuclear Biomolecular
Policetídeos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antineoplastic Agents, Phytogenic); 0 (Diterpenes); 0 (Drugs, Chinese Herbal); 0 (Polyketides); 0 (botrysphone A); 0 (botrysphone B); 0 (botrysphone C); 0 (sphaeropsidone); EC 1.6.5.2 (NAD(P)H Dehydrogenase (Quinone))
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170830
[Lr] Data última revisão:
170830
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170614
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jnatprod.6b01196


  5 / 1208 MEDLINE  
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[PMID]:28528316
[Au] Autor:Kosior G; Pribylová P; Vanková L; Kukucka P; Audy O; Klánová J; Samecka-Cymerman A; Mróz L; Kempers AJ
[Ad] Endereço:Department of Ecology, Biogeochemistry and Environmental Protection, Wroclaw University, ul. Kanonia 6/8, 50-328 Wroclaw, Poland. Electronic address: grzegorz.kosior@uwr.edu.pl.
[Ti] Título:Bioindication of PBDEs and PCBs by native and transplanted moss Pleurozium schreberi.
[So] Source:Ecotoxicol Environ Saf;143:136-142, 2017 Sep.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:PBDEs and PCBs are toxic, persistent organic pollutants (POPs), and the use of PCBs is forbidden, but they are still present in many environments and biota. 90-day assays were conducted with the moss Pleurozium schreberi transplanted from an uncontaminated control site to ten sites (rural and urban) selected in one of the most polluted regions of Upper Silesia in Poland. Native P. schreberi mosses were collected from the same ten polluted sites. Concentrations of PBDEs (28, 47, 66, 85, 99, 100, 153, 154, 183 and 209) and PCBs (28, 52, 101, 118, 138, 153, 180) were determined in all native and transplanted P. schreberi from all sites. Native P. schreberi contained the highest ΣPBDE and ΣPCB levels (63.6ngg and 4.47pgg , respectively) when collected in the vicinity of a steel smelter. After 90 days of the experiment native and transplanted P. schreberi contained the highest concentrations of the same BDE 209 congener (88-91% of total PBDEs in the native mosses and 85-90% of the total PBDE burden in the transplants). The native and transplanted mosses from the industrial sites after 90 days of exposure contained significantly higher concentrations of all the examined PBDE and PCB congeners (except for 153 and 180) than mosses from rural sites. PBDE and PCB values were higher in native than in transplanted mosses after 90 days of exposure in both rural and industrial sites.
[Mh] Termos MeSH primário: Bryopsida/química
Éteres Difenil Halogenados/análise
Bifenilos Policlorados/análise
[Mh] Termos MeSH secundário: Monitoramento Ambiental
Polônia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Halogenated Diphenyl Ethers); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171003
[Lr] Data última revisão:
171003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170522
[St] Status:MEDLINE


  6 / 1208 MEDLINE  
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[PMID]:28490519
[Au] Autor:Baughman JT; Payton AC; Paasch AE; Fisher KM; McDaniel SF
[Ad] Endereço:Department of Biological Sciences, California State University, 5151 State University Drive, Los Angeles, California 90032 USA jbaughman@berkeley.edu.
[Ti] Título:Multiple factors influence population sex ratios in the Mojave Desert moss .
[So] Source:Am J Bot;104(5):733-742, 2017 May.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF RESEARCH: Natural populations of many mosses appear highly female-biased based on the presence of reproductive structures. This bias could be caused by increased male mortality, lower male growth rate, or a higher threshold for achieving sexual maturity in males. Here we test these hypotheses using samples from two populations of the Mojave Desert moss . METHODS: We used double-digest restriction-site associated DNA (RAD) sequencing to identify candidate sex-associated loci in a panel of sex-expressing plants. Next, we used putative sex-associated markers to identify the sex of individuals without sex structures. KEY RESULTS: We found a 17:1 patch-level phenotypic female to male sex ratio in the higher elevation site (Wrightwood) and no sex expression at the low elevation site (Phelan). In contrast, on the basis of genetic data, we found a 2:1 female bias at the Wrightwood site and only females at the Phelan site. The relative area occupied by male and female genets was indistinguishable, but males were less genetically diverse. CONCLUSIONS: Our data suggest that both male-biased mortality and sexual dimorphism in thresholds for sex expression could explain genetic and phenotypic sex ratio biases and that phenotypic sex expression alone over-estimates the extent of actual sex ratio bias present in these two populations of .
[Mh] Termos MeSH primário: Bryopsida/fisiologia
Clima Desértico
[Mh] Termos MeSH secundário: Bryopsida/genética
Meio Ambiente
Fenótipo
Análise de Sequência de DNA
Razão de Masculinidade
Sudoeste dos Estados Unidos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171019
[Lr] Data última revisão:
171019
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170512
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1700045


  7 / 1208 MEDLINE  
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[PMID]:28442535
[Au] Autor:Yamada M; Tanaka-Takiguchi Y; Hayashi M; Nishina M; Goshima G
[Ad] Endereço:Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
[Ti] Título:Multiple kinesin-14 family members drive microtubule minus end-directed transport in plant cells.
[So] Source:J Cell Biol;216(6):1705-1714, 2017 Jun 05.
[Is] ISSN:1540-8140
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Minus end-directed cargo transport along microtubules (MTs) is exclusively driven by the molecular motor dynein in a wide variety of cell types. Interestingly, during evolution, plants have lost the genes encoding dynein; the MT motors that compensate for dynein function are unknown. Here, we show that two members of the kinesin-14 family drive minus end-directed transport in plants. Gene knockout analyses of the moss revealed that the plant-specific class VI kinesin-14, KCBP, is required for minus end-directed transport of the nucleus and chloroplasts. Purified KCBP directly bound to acidic phospholipids and unidirectionally transported phospholipid liposomes along MTs in vitro. Thus, minus end-directed transport of membranous cargoes might be driven by their direct interaction with this motor protein. Newly nucleated cytoplasmic MTs represent another known cargo exhibiting minus end-directed motility, and we identified the conserved class I kinesin-14 (ATK) as the motor involved. These results suggest that kinesin-14 motors were duplicated and developed as alternative MT-based minus end-directed transporters in land plants.
[Mh] Termos MeSH primário: Bryopsida/metabolismo
Cinesina/metabolismo
Microtúbulos/metabolismo
Proteínas Motores Moleculares/metabolismo
Células Vegetais/metabolismo
Proteínas de Plantas/metabolismo
Plantas Geneticamente Modificadas/metabolismo
[Mh] Termos MeSH secundário: Bryopsida/citologia
Bryopsida/genética
Núcleo Celular/metabolismo
Cloroplastos/metabolismo
Cinesina/genética
Microscopia de Vídeo
Proteínas Motores Moleculares/genética
Fosfolipídeos/metabolismo
Proteínas de Plantas/genética
Plantas Geneticamente Modificadas/citologia
Plantas Geneticamente Modificadas/genética
Transporte Proteico
Transdução de Sinais
Fatores de Tempo
Vesículas Transportadoras/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; VIDEO-AUDIO MEDIA
[Nm] Nome de substância:
0 (Molecular Motor Proteins); 0 (Phospholipids); 0 (Plant Proteins); EC 3.6.4.4 (Kinesin)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170913
[Lr] Data última revisão:
170913
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170427
[St] Status:MEDLINE
[do] DOI:10.1083/jcb.201610065


  8 / 1208 MEDLINE  
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[PMID]:28394399
[Au] Autor:Schallenberg-Rüdinger M; Oldenkott B; Hiss M; Trinh PL; Knoop V; Rensing SA
[Ad] Endereço:Plant Cell Biology, Faculty of Biology, University of Marburg, Karl-von-Frisch-Str, Marburg, Germany.
[Ti] Título:A Single-Target Mitochondrial RNA Editing Factor of Funaria hygrometrica Can Fully Reconstitute RNA Editing at Two Sites in Physcomitrella patens.
[So] Source:Plant Cell Physiol;58(3):496-507, 2017 03 01.
[Is] ISSN:1471-9053
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Nuclear-encoded pentatricopeptide repeat (PPR) proteins are key factors for site-specific RNA editing, converting cytidines into uridines in plant mitochondria and chloroplasts. All editing factors in the model moss Physcomitrella patens have a C-terminal DYW domain with similarity to cytidine deaminase. However, numerous editing factors in flowering plants lack such a terminal DYW domain, questioning its immediate role in the pyrimidine base conversion process. Here we further investigate the Physcomitrella DYW-type PPR protein PPR_78, responsible for mitochondrial editing sites cox1eU755SL and rps14eU137SL. Complementation assays with truncated proteins demonstrate that the DYW domain is essential for full PPR_78 editing functionality. The DYW domain can be replaced, however, with its counterpart from another editing factor, PPR_79. The PPR_78 ortholog of the related moss Funaria hygrometrica fully complements the Physcomitrella mutant for editing at both sites, although the editing site in rps14 is lacking in Funaria. Editing factor orthologs in different taxa may thus retain editing capacity for multiple sites despite the absence of editing requirement.
[Mh] Termos MeSH primário: Bryopsida/genética
Edição de RNA/genética
RNA/genética
[Mh] Termos MeSH secundário: Mitocôndrias/genética
Proteínas de Plantas/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 0 (RNA, mitochondrial); 63231-63-0 (RNA)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170722
[Lr] Data última revisão:
170722
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170411
[St] Status:MEDLINE
[do] DOI:10.1093/pcp/pcw229


  9 / 1208 MEDLINE  
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[PMID]:28330560
[Au] Autor:Nájera VA; González MC; Pérez-Ruiz JM; Cejudo FJ
[Ad] Endereço:Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and CSIC, Avda Américo Vespucio 49, 41092, Sevilla, Spain. Electronic address: mvictoria.armario@ibvf.csic.es.
[Ti] Título:An event of alternative splicing affects the expression of the NTRC gene, encoding NADPH-thioredoxin reductase C, in seed plants.
[So] Source:Plant Sci;258:21-28, 2017 May.
[Is] ISSN:1873-2259
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:The NTRC gene encodes a NADPH-dependent thioredoxin reductase with a joint thioredoxin domain, exclusive of photosynthetic organisms. An updated search shows that although most species harbor a single copy of the NTRC gene, two copies were identified in different species of the genus Solanum, Glycine max and the moss Physcomitrella patens. The phylogenetic analysis of NTRCs from different sources produced a tree with the major groups of photosynthetic organisms: cyanobacteria, algae and land plants, indicating the evolutionary success of the NTRC gene among photosynthetic eukaryotes. An event of alternative splicing affecting the expression of the NTRC gene was identified, which is conserved in seed plants but not in algae, bryophytes and lycophytes. The alternative splicing event results in a transcript with premature stop codon, which would produce a truncated form of the enzyme. The standard splicing/alternative splicing (SS/AS) transcripts ratio was higher in photosynthetic tissues from Arabidopsis, Brachypodium and tomato, in line with the higher content of the NTRC polypeptide in these tissues. Moreover, environmental stresses such as cold or high salt affected the SS/AS ratio of the NTRC gene transcripts in Brachypodium seedlings. These results suggest that the alternative splicing of the NTRC gene might be an additional mechanism for modulating the content of NTRC in photosynthetic and non-photosynthetic tissues of seed plants.
[Mh] Termos MeSH primário: Processamento Alternativo/fisiologia
Regulação da Expressão Gênica de Plantas/fisiologia
Tiorredoxina Dissulfeto Redutase/metabolismo
[Mh] Termos MeSH secundário: Bryopsida/genética
Bryopsida/metabolismo
Bryopsida/fisiologia
Regulação da Expressão Gênica de Plantas/genética
Genes de Plantas/genética
Genes de Plantas/fisiologia
Filogenia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Proteínas de Plantas/fisiologia
Solanum/genética
Solanum/metabolismo
Solanum/fisiologia
Feijão de Soja/genética
Feijão de Soja/metabolismo
Feijão de Soja/fisiologia
Tiorredoxina Dissulfeto Redutase/genética
Tiorredoxina Dissulfeto Redutase/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); EC 1.8.1.9 (Thioredoxin-Disulfide Reductase)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170519
[Lr] Data última revisão:
170519
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE


  10 / 1208 MEDLINE  
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[PMID]:28273543
[Au] Autor:Di Palma A; Capozzi F; Spagnuolo V; Giordano S; Adamo P
[Ad] Endereço:Centro Interdipartimentale di Ricerca Ambiente (CIRAM), Università di Napoli Federico II, via Mezzocannone, 16, 80132 Napoli, Italy; Dipartimento di Agraria, Università di Napoli Federico II, Via Università 100, 80055 Portici, NA, Italy.
[Ti] Título:Atmospheric particulate matter intercepted by moss-bags: Relations to moss trace element uptake and land use.
[So] Source:Chemosphere;176:361-368, 2017 Jun.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Particulate matter has to be constantly monitored because it is an important atmospheric transport form of potentially harmful contaminants. The cost-effective method of the moss-bags can be employed to evaluate both loads and chemical composition of PM. PM entrapped by the moss Pseudoscleropodium purum exposed in bags in 9 European sites was characterized for number, size and chemical composition by SEM/EDX. Moreover, moss elemental uptake of 53 elements including rare earth elements was estimated by ICP-MS analysis. All above was aimed to find possible relations between PM profile and moss uptake and to find out eventual element markers of the different land use (i.e. agricultural, urban, industrial) of the selected sites. After exposure, about 12,000 particles, mostly within the inhalable fraction, were counted on P. purum leaves; their number generally increased from the agricultural sites to the urban and industrial ones. ICP analysis indicated that twenty-three elements were significantly accumulated by mosses with different element profile according to the various land uses. The PM from agricultural sites were mainly made of natural/crustal elements or derived from rural activities. Industrial-related PM covered a wider range of sources, from those linked to specific industrial activities, to those related to manufacturing processes or use of heavy-duty vehicles. This study indicates a close association between PM amount and moss element-uptake, which increases in parallel with PM amount. Precious metals and REEs may constitute novel markers of air pollution in urban and agricultural sites, respectively.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Bryopsida/química
Monitoramento Ambiental/métodos
Metais/análise
Material Particulado/análise
Oligoelementos/análise
[Mh] Termos MeSH secundário: Metais Terras Raras/análise
Tamanho da Partícula
Urbanização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Metals); 0 (Metals, Rare Earth); 0 (Particulate Matter); 0 (Trace Elements)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170517
[Lr] Data última revisão:
170517
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170309
[St] Status:MEDLINE



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