Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.595.400.825 [Categoria DeCS]
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  1 / 22 MEDLINE  
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[PMID]:28317539
[Au] Autor:Lawrence DP; Peduto Hand F; Gubler WD; Trouillas FP
[Ad] Endereço:Department of Plant Pathology, University of California, One Shields Avenue, Davis, CA 95616, USA.
[Ti] Título:Botryosphaeriaceae species associated with dieback and canker disease of bay laurel in northern California with the description of Dothiorella californica sp. nov.
[So] Source:Fungal Biol;121(4):347-360, 2017 Apr.
[Is] ISSN:1878-6146
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Members of the Botryosphaeriaceae are cosmopolitan fungi that may exist as seemingly innocuous endophytes or as destructive pathogens of numerous woody hosts, including fruit and nut crops, urban ornamental trees and shrubs, and forest trees. Surveys of bay laurel in northern California have revealed symptoms of dieback and branch canker of unknown aetiology. The goals of this study were to identify and clarify the species of Botryosphaeriaceae associated with these symptoms and to confirm their pathogenicity. To understand the role of members of the Botryosphaeriaceae in the dieback and canker disease of bay laurel, 23 isolates were isolated from symptomatic wood. Phylogenetic analyses of ITS, translation elongation factor 1-α, and beta-tubulin revealed three species: Botryosphaeria dothidea, Neofusicoccum nonquaesitum, and the newly described and typified species Dothiorella californica sp. nov. When select isolates were inoculated to 2- to 3-year-old branches of Umbellularia californica in a natural forest, both B. dothidea and N. nonquaesitum were pathogenic with N. nonquaesitum producing the largest lesions at 12- and 18-months post inoculation, respectively, while Do. californica did not cause wood lesions significantly greater than the mock-inoculated controls. This study represents the first attempt to identify and test the pathogenicity of Botryosphaeriaceae species associated with dieback and canker disease of bay laurel in a northern California forest.
[Mh] Termos MeSH primário: Ascomicetos/classificação
Ascomicetos/isolamento & purificação
Doenças das Plantas/microbiologia
[Mh] Termos MeSH secundário: Ascomicetos/genética
Ascomicetos/patogenicidade
Análise por Conglomerados
DNA Fúngico/química
DNA Fúngico/genética
DNA Espaçador Ribossômico/química
DNA Espaçador Ribossômico/genética
Filogenia
Análise de Sequência de DNA
Tubulina (Proteína)/genética
Umbellularia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Fungal); 0 (DNA, Ribosomal Spacer); 0 (Tubulin)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170926
[Lr] Data última revisão:
170926
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170321
[St] Status:MEDLINE


  2 / 22 MEDLINE  
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[PMID]:28212406
[Au] Autor:Hu Z; Wu Q; Dalal J; Vasani N; Lopez HO; Sederoff HW; Qu R
[Ad] Endereço:Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, United States of America.
[Ti] Título:Accumulation of medium-chain, saturated fatty acyl moieties in seed oils of transgenic Camelina sativa.
[So] Source:PLoS One;12(2):e0172296, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:With its high seed oil content, the mustard family plant Camelina sativa has gained attention as a potential biofuel source. As a bioenergy crop, camelina has many advantages. It grows on marginal land with low demand for water and fertilizer, has a relatively short life cycle, and is stress tolerant. As most other crop seed oils, camelina seed triacylglycerols (TAGs) consist of mostly long, unsaturated fatty acyl moieties, which is not desirable for biofuel processing. In our efforts to produce shorter, saturated chain fatty acyl moieties in camelina seed oil for conversion to jet fuel, a 12:0-acyl-carrier thioesterase gene, UcFATB1, from California bay (Umbellularia californica Nutt.) was expressed in camelina seeds. Up to 40% of short chain laurate (C12:0) and myristate (C14:0) were present in TAGs of the seed oil of the transgenics. The total oil content and germination rate of the transgenic seeds were not affected. Analysis of positions of these two fatty acyl moieties in TAGs indicated that they were present at the sn-1 and sn-3 positions, but not sn-2, on the TAGs. Suppression of the camelina KASII genes by RNAi constructs led to higher accumulation of palmitate (C16:0), from 7.5% up to 28.5%, and further reduction of longer, unsaturated fatty acids in seed TAGs. Co-transformation of camelina with both constructs resulted in enhanced accumulation of all three medium-chain, saturated fatty acids in camelina seed oils. Our results show that a California bay gene can be successfully used to modify the oil composition in camelina seed and present a new biological alternative for jet fuel production.
[Mh] Termos MeSH primário: Brassicaceae/genética
Brassicaceae/metabolismo
Óleos Vegetais/metabolismo
Sementes/metabolismo
Triglicerídeos/química
Triglicerídeos/metabolismo
[Mh] Termos MeSH secundário: 3-Oxoacil-(Proteína de Transporte de Acila) Sintase/deficiência
3-Oxoacil-(Proteína de Transporte de Acila) Sintase/genética
Plantas Geneticamente Modificadas
Interferência de RNA
Tioléster Hidrolases/genética
Umbellularia/enzimologia
Umbellularia/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Oils); 0 (Triglycerides); EC 2.3.1.41 (3-Oxoacyl-(Acyl-Carrier-Protein) Synthase); EC 3.1.2.- (Thiolester Hydrolases)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170825
[Lr] Data última revisão:
170825
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170218
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0172296


  3 / 22 MEDLINE  
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[PMID]:26439707
[Au] Autor:Johnston SF; Cohen MF; Torok T; Meentemeyer RK; Rank NE
[Ad] Endereço:First, second, and fifth authors: Department of Biology, Sonoma State University, Rohnert Park, CA 94928; third author: Lawrence Berkeley National Laboratory, Earth Sciences Division, Berkeley, CA 94720; and fourth author: Department of Forestry and Environmental Resources, North Carolina State Univ
[Ti] Título:Host Phenology and Leaf Effects on Susceptibility of California Bay Laurel to Phytophthora ramorum.
[So] Source:Phytopathology;106(1):47-55, 2016 Jan.
[Is] ISSN:0031-949X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Spread of the plant pathogen Phytophthora ramorum, causal agent of the forest disease sudden oak death, is driven by a few competent hosts that support spore production from foliar lesions. The relationship between traits of a principal foliar host, California bay laurel (Umbellularia californica), and susceptibility to P. ramorum infection were investigated with multiple P. ramorum isolates and leaves collected from multiple trees in leaf-droplet assays. We examined whether susceptibility varies with season, leaf age, or inoculum position. Bay laurel susceptibility was highest during spring and summer and lowest in winter. Older leaves (>1 year) were more susceptible than younger ones (8 to 11 months). Susceptibility was greater at leaf tips and edges than the middle of the leaf. Leaf surfaces wiped with 70% ethanol were more susceptible to P. ramorum infection than untreated leaf surfaces. Our results indicate that seasonal changes in susceptibility of U. californica significantly influence P. ramorum infection levels. Thus, in addition to environmental variables such as temperature and moisture, variability in host plant susceptibility contributes to disease establishment of P. ramorum.
[Mh] Termos MeSH primário: Phytophthora/fisiologia
Doenças das Plantas/microbiologia
Folhas de Planta/microbiologia
Umbellularia/microbiologia
[Mh] Termos MeSH secundário: California
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1603
[Cu] Atualização por classe:160115
[Lr] Data última revisão:
160115
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151007
[St] Status:MEDLINE
[do] DOI:10.1094/PHYTO-01-15-0016-R


  4 / 22 MEDLINE  
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[PMID]:26001558
[Au] Autor:Carranza MG; Sevigny MB; Banerjee D; Fox-Cubley L
[Ad] Endereço:Department of Natural Sciences and Mathematics, Dominican University of California, 50 Acacia Avenue, San Rafael, CA, 94901, USA. maria.carranza@dominican.edu.
[Ti] Título:Antibacterial activity of native California medicinal plant extracts isolated from Rhamnus californica and Umbellularia californica.
[So] Source:Ann Clin Microbiol Antimicrob;14:29, 2015 May 23.
[Is] ISSN:1476-0711
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Antimicrobial resistance (AMR) is a major threat to global public health. Medicinal plants have long been used as remedies for infectious diseases by native cultures around the world and have the potential for providing effective treatments for antibiotic-resistant infections. Rhamnus californica (Rhamnaceae) and Umbellularia californica (Lauraceae) are two indigenous California plant species historically used by Native Americans to treat skin, respiratory and gastrointestinal infections. This study aimed to assess the in vitro antimicrobial activity of methanolic extracts of leaves and bark of R. and U. californica against methicillin-resistant Staphylococcus aureus (MRSA) and other Gram-positive and Gram-negative bacteria. METHODS: Methanolic extracts of leaves and bark of R. and U. californica were prepared by soxhlet extraction and evaluated for their antimicrobial activity against Bacillus cereus, Streptococcus pyogenes, Mycobacterium smegmatis, Staphylococcus aureus, MRSA, Escherichia coli and Pseudomonas aeruginosa using disc diffusion and minimal inhibitory concentration (MIC) assays. Chemical profiling of the extracts was performed using standard methods. RESULTS: All extracts inhibited the growth of MRSA and other Gram-positive bacteria with MICs of 3.3-6.0 mg/ml. Gram-negative organisms were unaffected by these extracts. U. californica extracts (leaves and bark) had the lowest MIC values. Chemical profiling detected the presence of quinones, alkaloids, flavonoids, cardenolides, tannins and saponins in these extracts. Our study is the first to report the antimicrobial properties of R. and U. californica and illustrates their promising anti-MRSA potential. CONCLUSIONS: Our results give scientific credence to the traditional medicinal uses of these plants by the indigenous peoples of California. Further investigation of the secondary metabolites responsible for the antimicrobial activity of these extracts against MRSA is warranted.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Infecções Bacterianas/microbiologia
Extratos Vegetais/farmacologia
Plantas Medicinais/química
Rhamnus/química
Umbellularia/química
[Mh] Termos MeSH secundário: Antibacterianos/química
Antibacterianos/isolamento & purificação
Bactérias/efeitos dos fármacos
Infecções Bacterianas/tratamento farmacológico
California
Seres Humanos
Fitoterapia
Casca de Planta/química
Extratos Vegetais/química
Extratos Vegetais/isolamento & purificação
Folhas de Planta/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Plant Extracts)
[Em] Mês de entrada:1512
[Cu] Atualização por classe:150528
[Lr] Data última revisão:
150528
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150524
[St] Status:MEDLINE
[do] DOI:10.1186/s12941-015-0086-0


  5 / 22 MEDLINE  
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[PMID]:25098281
[Au] Autor:DiLeo MV; Bostock RM; Rizzo DM
[Ad] Endereço:Department of Plant Pathology, University of California Davis, Davis, California, United States of America.
[Ti] Título:Microclimate impacts survival and prevalence of Phytophthora ramorum in Umbellularia californica, a key reservoir host of sudden oak death in Northern California forests.
[So] Source:PLoS One;9(8):e98195, 2014.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Phytophthora ramorum, an invasive pathogen and the causal agent of Sudden Oak Death, has become established in mixed-evergreen and redwood forests in coastal northern California. While oak and tanoak mortality is the most visible indication of P. ramorum's presence, epidemics are largely driven by the presence of bay laurel (Umbellularia californica), a reservoir host that supports both prolific sporulation in the winter wet season and survival during the summer dry season. In order to better understand how over-summer survival of the pathogen contributes to variability in the severity of annual epidemics, we monitored the viability of P. ramorum leaf infections over three years along with coincident microclimate. The proportion of symptomatic bay laurel leaves that contained viable infections decreased during the first summer dry season and remained low for the following two years, likely due to the absence of conducive wet season weather during the study period. Over-summer survival of P. ramorum was positively correlated with high percent canopy cover, less negative bay leaf water potential and few days exceeding 30°C but was not significantly different between mixed-evergreen and redwood forest ecosystems. Decreased summer survival of P. ramorum in exposed locations and during unusually hot summers likely contributes to the observed spatiotemporal heterogeneity of P. ramorum epidemics.
[Mh] Termos MeSH primário: Phytophthora/fisiologia
Doenças das Plantas/microbiologia
Estações do Ano
Umbellularia/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1511
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140808
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0098195


  6 / 22 MEDLINE  
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[PMID]:24932721
[Au] Autor:Sherkhanov S; Korman TP; Bowie JU
[Ad] Endereço:Department of Chemistry and Biochemistry, UCLA-DOE Laboratory of Genomics and Proteomics, Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, USA.
[Ti] Título:Improving the tolerance of Escherichia coli to medium-chain fatty acid production.
[So] Source:Metab Eng;25:1-7, 2014 Sep.
[Is] ISSN:1096-7184
[Cp] País de publicação:Belgium
[La] Idioma:eng
[Ab] Resumo:Microbial fatty acids are an attractive source of precursors for a variety of renewable commodity chemicals such as alkanes, alcohols, and biofuels. Rerouting lipid biosynthesis into free fatty acid production can be toxic, however, due to alterations of membrane lipid composition. Here we find that membrane lipid composition can be altered by the direct incorporation of medium-chain fatty acids into lipids via the Aas pathway in cells expressing the medium-chain thioesterase from Umbellularia californica (BTE). We find that deletion of the aas gene and sequestering exported fatty acids reduces medium-chain fatty acid toxicity, partially restores normal lipid composition, and improves medium-chain fatty acid yields.
[Mh] Termos MeSH primário: Escherichia coli/fisiologia
Ácidos Graxos/biossíntese
Melhoramento Genético/métodos
Engenharia Metabólica/métodos
Palmitoil-CoA Hidrolase/genética
Umbellularia/enzimologia
[Mh] Termos MeSH secundário: Clonagem Molecular/métodos
Ácidos Graxos/genética
Deleção de Genes
Palmitoil-CoA Hidrolase/metabolismo
Umbellularia/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Fatty Acids); EC 3.1.2.2 (Palmitoyl-CoA Hydrolase)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:140901
[Lr] Data última revisão:
140901
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140617
[St] Status:MEDLINE


  7 / 22 MEDLINE  
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[PMID]:24889416
[Au] Autor:Wu H; San KY
[Ad] Endereço:Department of Bioengineering, Rice University, Houston, Texas.
[Ti] Título:Efficient odd straight medium chain free fatty acid production by metabolically engineered Escherichia coli.
[So] Source:Biotechnol Bioeng;111(11):2209-19, 2014 Nov.
[Is] ISSN:1097-0290
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Free fatty acids (FFAs) can be used as precursors for the production of biofuels or chemicals. Different composition of FFAs will be useful for further modification of the biofuel/biochemical quality. Microbial biosynthesis of even chain FFAs can be achieved by introducing an acyl-acyl carrier protein thioesterase gene into E. coli. In this study, odd straight medium chain FFAs production was investigated by using metabolic engineered E. coli carrying acyl-ACP thioesterase (TE, Ricinus communis), propionyl-CoA synthase (Salmonella enterica), and ß-ketoacyl-acyl carrier protein synthase III (four different sources) with supplement of extracellular propionate. By using these metabolically engineered E. coli, significant quantity of C13 and C15 odd straight-chain FFAs could be produced from glucose and propionate. The highest concentration of total odd straight chain FFAs attained was 1205 mg/L by the strain HWK201 (pXZ18, pBHE2), and 85% of the odd straight chain FFAs was C15. However, the highest percentage of odd straight chain FFAs was achieved by the strain HWK201 (pXZ18, pBHE3) of 83.2% at 48 h. This strategy was also applied successfully in strains carrying different TE, such as the medium length acyl-ACP thioesterase gene from Umbellularia californica. C11 and C13 became the major odd straight-chain FFAs.
[Mh] Termos MeSH primário: Escherichia coli/genética
Escherichia coli/metabolismo
Ácidos Graxos não Esterificados/metabolismo
Engenharia Metabólica/métodos
Redes e Vias Metabólicas
[Mh] Termos MeSH secundário: 3-Oxoacil-(Proteína de Transporte de Acila) Sintase/genética
3-Oxoacil-(Proteína de Transporte de Acila) Sintase/metabolismo
Coenzima A Ligases/genética
Coenzima A Ligases/metabolismo
Meios de Cultura/química
Propionatos/metabolismo
Proteínas Recombinantes/genética
Proteínas Recombinantes/metabolismo
Ricinus/enzimologia
Ricinus/genética
Salmonella enterica/enzimologia
Salmonella enterica/genética
Tioléster Hidrolases/genética
Tioléster Hidrolases/metabolismo
Umbellularia/enzimologia
Umbellularia/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Culture Media); 0 (Fatty Acids, Nonesterified); 0 (Propionates); 0 (Recombinant Proteins); EC 2.3.1.180 (3-ketoacyl-acyl carrier protein synthase III); EC 2.3.1.41 (3-Oxoacyl-(Acyl-Carrier-Protein) Synthase); EC 3.1.2.- (Thiolester Hydrolases); EC 3.1.2.14 (oleoyl-(acyl-carrier-protein) hydrolase); EC 6.2.1.- (Coenzyme A Ligases); EC 6.2.1.17 (propionate - CoA ligase)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:140925
[Lr] Data última revisão:
140925
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140604
[St] Status:MEDLINE
[do] DOI:10.1002/bit.25296


  8 / 22 MEDLINE  
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[PMID]:24266426
[Au] Autor:Tabanca N; Avonto C; Wang M; Parcher JF; Ali A; Demirci B; Raman V; Khan IA
[Ad] Endereço:National Center for Natural Products Research, University of Mississippi , University, Mississippi 38677, United States.
[Ti] Título:Comparative investigation of Umbellularia californica and Laurus nobilis leaf essential oils and identification of constituents active against Aedes aegypti.
[So] Source:J Agric Food Chem;61(50):12283-91, 2013 Dec 18.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Umbellularia californica (California bay laurel) and Laurus nobilis (Mediterranean bay laurel) leaves may be mistaken or used as a substitute on the market due to their morphological similarity. In this study, a comparison of anatomical and chemical features and biological activity of both plants is presented. L. nobilis essential oil biting deterrent and larvicidal activity were negligible. On the other hand, U. californica leaf oil showed biting deterrent activity against Aedes aegypti . The identified active repellents was thymol, along with (-)-umbellulone, 1,8-cineole, and (-)-α-terpineol. U. californica essential oil also demonstrated good larvicidal activity against 1-day-old Ae. aegypti larvae with a LD50 value of 52.6 ppm. Thymol (LD50 = 17.6 ppm), p-cymene, (-)-umbellulone, and methyleugenol were the primary larvicidal in this oil. Umbellulone was found as the principal compound (37%) of U. californica essential oil, but was not present in L. nobilis essential oil. Umbellulone mosquito activity is here reported for the first time.
[Mh] Termos MeSH primário: Aedes/efeitos dos fármacos
Inseticidas/farmacologia
Laurus/química
Óleos Voláteis/química
Óleos Voláteis/farmacologia
Óleos Vegetais/química
Óleos Vegetais/farmacologia
Umbellularia/química
[Mh] Termos MeSH secundário: Aedes/crescimento & desenvolvimento
Animais
Inseticidas/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Insecticides); 0 (Oils, Volatile); 0 (Plant Oils)
[Em] Mês de entrada:1407
[Cu] Atualização por classe:131218
[Lr] Data última revisão:
131218
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:131126
[St] Status:MEDLINE
[do] DOI:10.1021/jf4052682


  9 / 22 MEDLINE  
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[PMID]:23790136
[Au] Autor:Cobb RC; Eviner VT; Rizzo DM
[Ad] Endereço:Department of Plant Pathology, University of California, One Shields Ave, Davis, CA, 95616, USA.
[Ti] Título:Mortality and community changes drive sudden oak death impacts on litterfall and soil nitrogen cycling.
[So] Source:New Phytol;200(2):422-31, 2013 Oct.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Few studies have quantified pathogen impacts to ecosystem processes, despite the fact that pathogens cause or contribute to regional-scale tree mortality. We measured litterfall mass, litterfall chemistry, and soil nitrogen (N) cycling associated with multiple hosts along a gradient of mortality caused by Phytophthora ramorum, the cause of sudden oak death. In redwood forests, the epidemiological and ecological characteristics of the major overstory species determine disease patterns and the magnitude and nature of ecosystem change. Bay laurel (Umbellularia californica) has high litterfall N (0.992%), greater soil extractable NO3 -N, and transmits infection without suffering mortality. Tanoak (Notholithocarpus densiflorus) has moderate litterfall N (0.723%) and transmits infection while suffering extensive mortality that leads to higher extractable soil NO3 -N. Redwood (Sequoia sempervirens) has relatively low litterfall N (0.519%), does not suffer mortality or transmit the pathogen, but dominates forest biomass. The strongest impact of pathogen-caused mortality was the potential shift in species composition, which will alter litterfall chemistry, patterns and dynamics of litterfall mass, and increase soil NO3 -N availability. Patterns of P. ramorum spread and consequent mortality are closely associated with bay laurel abundances, suggesting this species will drive both disease emergence and subsequent ecosystem function.
[Mh] Termos MeSH primário: Interações Hospedeiro-Patógeno
Ciclo do Nitrogênio
Phytophthora/fisiologia
Doenças das Plantas/parasitologia
Quercus/fisiologia
Umbellularia/fisiologia
[Mh] Termos MeSH secundário: Carbono/metabolismo
Ecologia
Ecossistema
Nitrogênio/metabolismo
Quercus/parasitologia
Estações do Ano
Sequoia/parasitologia
Sequoia/fisiologia
Solo/química
Especificidade da Espécie
Árvores
Umbellularia/parasitologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Soil); 7440-44-0 (Carbon); N762921K75 (Nitrogen)
[Em] Mês de entrada:1404
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130625
[St] Status:MEDLINE
[do] DOI:10.1111/nph.12370


  10 / 22 MEDLINE  
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[PMID]:23689874
[Au] Autor:Stong RA; Kolodny E; Kelsey RG; González-Hernández MP; Vivanco JM; Manter DK
[Ad] Endereço:USDA-ARS, Soil-Plant-Nutrient Research, Fort Collins, CO, USA.
[Ti] Título:Effect of plant sterols and tannins on Phytophthora ramorum growth and sporulation.
[So] Source:J Chem Ecol;39(6):733-43, 2013 Jun.
[Is] ISSN:1573-1561
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Elicitin-mediated acquisition of plant sterols is required for growth and sporulation of Phytophthora spp. This study examined the interactions between elicitins, sterols, and tannins. Ground leaf tissue, sterols, and tannin-enriched extracts were obtained from three different plant species (California bay laurel, California black oak, and Oregon white oak) in order to evaluate the effect of differing sterol/tannin contents on Phytophthora ramorum growth. For all three species, high levels of foliage inhibited P. ramorum growth and sporulation, with a steeper concentration dependence for the two oak samples. Phytophthora ramorum growth and sporulation were inhibited by either phytosterols or tannin-enriched extracts. High levels of sterols diminished elicitin gene expression in P. ramorum; whereas the tannin-enriched extract decreased the amount of 'functional' or ELISA-detectable elicitin, but not gene expression. Across all treatment combinations, P. ramorum growth and sporulation correlated strongly with the amount of ELISA-detectable elicitin (R (2) = 0.791 and 0.961, respectively).
[Mh] Termos MeSH primário: Proteínas Fúngicas/metabolismo
Phytophthora/efeitos dos fármacos
Fitosteróis/farmacologia
Proteínas/metabolismo
Esporos Fúngicos/efeitos dos fármacos
Taninos/farmacologia
[Mh] Termos MeSH secundário: Phytophthora/crescimento & desenvolvimento
Phytophthora/fisiologia
Folhas de Planta/química
Quercus/química
Especificidade da Espécie
Esporos Fúngicos/fisiologia
Umbellularia/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Fungal Proteins); 0 (Phytosterols); 0 (Proteins); 0 (Tannins); 0 (elicitin, Phytophthora)
[Em] Mês de entrada:1312
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130522
[St] Status:MEDLINE
[do] DOI:10.1007/s10886-013-0295-y



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