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  1 / 8706 MEDLINE  
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[PMID]:28747394
[Au] Autor:Liu F; Chavez RL; Patek SN; Pringle A; Feng JJ; Chen CH
[Ad] Endereço:Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
[Ti] Título:Asymmetric drop coalescence launches fungal ballistospores with directionality.
[So] Source:J R Soc Interface;14(132), 2017 Jul.
[Is] ISSN:1742-5662
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Thousands of fungal species use surface energy to power the launch of their ballistospores. The surface energy is released when a spherical Buller's drop at the spore's hilar appendix merges with a flattened drop on the adaxial side of the spore. The launching mechanism is primarily understood in terms of energetic models, and crucial features such as launching directionality are unexplained. Integrating experiments and simulations, we advance a mechanistic model based on the capillary-inertial coalescence between the Buller's drop and the adaxial drop, a pair that is asymmetric in size, shape and relative position. The asymmetric coalescence is surprisingly effective and robust, producing a launching momentum governed by the Buller's drop and a launching direction along the adaxial plane of the spore. These key functions of momentum generation and directional control are elucidated by numerical simulations, demonstrated on spore-mimicking particles, and corroborated by published ballistospore kinematics. Our work places the morphological and kinematic diversity of ballistospores into a general mechanical framework, and points to a generic catapulting mechanism of colloidal particles with implications for both biology and engineering.
[Mh] Termos MeSH primário: Ascomicetos/fisiologia
Basidiomycota/fisiologia
Esporos Fúngicos/fisiologia
[Mh] Termos MeSH secundário: Fenômenos Biomecânicos
Modelos Biológicos
Movimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:170728
[St] Status:MEDLINE


  2 / 8706 MEDLINE  
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[PMID]:29251476
[Au] Autor:Singh G; Sharma P; Sharma S
[Ti] Título:Role of growth media on the phytopromotional potential of symbiotic fungus Piriformospoira indica.
[So] Source:J Environ Biol;37(5):889-94, 2016 09.
[Is] ISSN:0254-8704
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:Piriformospora indica biomass generated in different growth media Rose Bengal medium, Kaefer's Medium, Enriched Soil Medium, Malt extract Medium and Czapek Dox was quantified and? their bioinoculum potential was compared using? moong bean (Vigna radiata) as? test plant. Plant chlorophyll content in response to inoculations was lowest in Rose Bengal medium (2.772mg plant-1) and highest due to inoculum produced on Enriched soil Medium (3.694 mg plant-1). The highest nitrogen content (19.260 mg plant-1) was recorded by inoculum produced on Kaefer's Medium followed by Enriched Soil Medium (19.123 mg plant-1), ME (18.19 mg plant-1) and CD medium (17.71 mg plant-1). The highest plant phosphorus uptake was registered in Enriched Soil Medium (17.153 mg plant-1) followed by Kaefer's Medium (17.023 mg plant-1). Maximum dry weight of plants was observed by inoculation with fungus cultured in Kaefer's Medium (3.416 g pot-1) and Enriched Soil Medium (3.349 g pot-1). Thus, growth medium used for the culture of fungus can influence its bioefficacy as plant growth promoting agent and Piriformospora indica can be grown on cost effective and simple mass multiplication medium which could augment its usage for commercial purposes.
[Mh] Termos MeSH primário: Basidiomycota/fisiologia
Endófitos
Fabaceae/crescimento & desenvolvimento
Fabaceae/microbiologia
[Mh] Termos MeSH secundário: Fosfatase Ácida/metabolismo
Fosfatase Alcalina/metabolismo
Regulação Enzimológica da Expressão Gênica/fisiologia
Regulação da Expressão Gênica de Plantas/fisiologia
Raízes de Plantas/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
EC 3.1.3.1 (Alkaline Phosphatase); EC 3.1.3.2 (Acid Phosphatase)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE


  3 / 8706 MEDLINE  
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[PMID]:29385175
[Au] Autor:Firdaus-Raih M; Hashim NHF; Bharudin I; Abu Bakar MF; Huang KK; Alias H; Lee BKB; Mat Isa MN; Mat-Sharani S; Sulaiman S; Tay LJ; Zolkefli R; Muhammad Noor Y; Law DSN; Abdul Rahman SH; Md-Illias R; Abu Bakar FD; Najimudin N; Abdul Murad AM; Mahadi NM
[Ad] Endereço:School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia.
[Ti] Título:The Glaciozyma antarctica genome reveals an array of systems that provide sustained responses towards temperature variations in a persistently cold habitat.
[So] Source:PLoS One;13(1):e0189947, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Extremely low temperatures present various challenges to life that include ice formation and effects on metabolic capacity. Psyhcrophilic microorganisms typically have an array of mechanisms to enable survival in cold temperatures. In this study, we sequenced and analysed the genome of a psychrophilic yeast isolated in the Antarctic region, Glaciozyma antarctica. The genome annotation identified 7857 protein coding sequences. From the genome sequence analysis we were able to identify genes that encoded for proteins known to be associated with cold survival, in addition to annotating genes that are unique to G. antarctica. For genes that are known to be involved in cold adaptation such as anti-freeze proteins (AFPs), our gene expression analysis revealed that they were differentially transcribed over time and in response to different temperatures. This indicated the presence of an array of adaptation systems that can respond to a changing but persistent cold environment. We were also able to validate the activity of all the AFPs annotated where the recombinant AFPs demonstrated anti-freeze capacity. This work is an important foundation for further collective exploration into psychrophilic microbiology where among other potential, the genes unique to this species may represent a pool of novel mechanisms for cold survival.
[Mh] Termos MeSH primário: Adaptação Fisiológica/genética
Basidiomycota/fisiologia
Temperatura Baixa
Ecossistema
Genoma Fúngico
[Mh] Termos MeSH secundário: Regiões Antárticas
Proteínas Anticongelantes/genética
Basidiomycota/genética
Íntrons
RNA Nucleolar Pequeno/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antifreeze Proteins); 0 (RNA, Small Nucleolar)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180201
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189947


  4 / 8706 MEDLINE  
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[PMID]:28745102
[Au] Autor:Aoun M; Kolmer JA; Rouse MN; Chao S; Bulbula WD; Elias EM; Acevedo M
[Ad] Endereço:First author: Department of Plant Pathology, North Dakota State University, Fargo 58108; second and third authors: United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Cereal Disease Laboratory, and Department of Plant Pathology, University of Minnesota, St. Paul 55108;
[Ti] Título:Inheritance and Bulked Segregant Analysis of Leaf Rust and Stem Rust Resistance in Durum Wheat Genotypes.
[So] Source:Phytopathology;107(12):1496-1506, 2017 12.
[Is] ISSN:0031-949X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Leaf rust, caused by Puccinia triticina, and stem rust, caused by P. graminis f. sp. tritici, are important diseases of durum wheat. This study determined the inheritance and genomic locations of leaf rust resistance (Lr) genes to P. triticina race BBBQJ and stem rust resistance (Sr) genes to P. graminis f. sp. tritici race TTKSK in durum accessions. Eight leaf-rust-resistant genotypes were used to develop biparental populations. Accessions PI 192051 and PI 534304 were also resistant to P. graminis f. sp. tritici race TTKSK. The resulting progenies were phenotyped for leaf rust and stem rust response at seedling stage. The Lr and Sr genes were mapped in five populations using single-nucleotide polymorphisms and bulked segregant analysis. Five leaf-rust-resistant genotypes carried single dominant Lr genes whereas, in the remaining accessions, there was deviation from the expected segregation ratio of a single dominant Lr gene. Seven genotypes carried Lr genes different from those previously characterized in durum. The single dominant Lr genes in PI 209274, PI 244061, PI387263, and PI 313096 were mapped to chromosome arms 6BS, 2BS, 6BL, and 6BS, respectively. The Sr gene in PI 534304 mapped to 6AL and is most likely Sr13, while the Sr gene in PI 192051 could be uncharacterized in durum.
[Mh] Termos MeSH primário: Basidiomycota/fisiologia
Resistência à Doença/genética
Doenças das Plantas/imunologia
Triticum/genética
[Mh] Termos MeSH secundário: Mapeamento Cromossômico
Cromossomos de Plantas/genética
Loci Gênicos/genética
Genótipo
Fenótipo
Doenças das Plantas/microbiologia
Folhas de Planta/genética
Folhas de Planta/imunologia
Folhas de Planta/microbiologia
Caules de Planta/genética
Caules de Planta/imunologia
Caules de Planta/microbiologia
Polimorfismo de Nucleotídeo Único/genética
Plântulas/genética
Plântulas/imunologia
Plântulas/microbiologia
Triticum/imunologia
Triticum/microbiologia
[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:170727
[St] Status:MEDLINE
[do] DOI:10.1094/PHYTO-12-16-0444-R


  5 / 8706 MEDLINE  
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[PMID]:29368882
[Au] Autor:Mironenko NV; Baranova OA; Kovalenko NM; Mikhailova LA; Rosseva LP
[Ti] Título:[Genetic structure of the Russian populations of Pyrenophora tritici-repentis, determined by using microsatellite markers].
[So] Source:Genetika;52(8):885-94, 2016 Aug.
[Is] ISSN:0016-6758
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The population genetic structure of plant pathogenic fungus Pyrenophora tritici-repentis was examined using microsatellite (SSR) markers. According to the geographical origin of the pathogen populations, they were designated as North Caucasian (S, 33 isolates), northwest (Nw, 39), and Omsk (Om, 43). The populations were analyzed at the nine most polymorphic SSR loci, at which 75 alleles were identified. To characterize the genetic variation within and between populations, the AMOVA algorithm as implemented in the Arlequin v. 3.5 software program was used. The number of alleles per locus ranged from 5 to 12 and their sizes varied within the range from 180 to 400 bp. The mean gene diversity at SSR loci was high for all populations (H = 0.58­0.75). The populations were considerably different in the frequencies of individual alleles of the SSR loci. Most isolates in the populations were represented by unique haplotypes. The within-population variation of the isolates at molecular markers was 86.4%; among the populations, 13.6%. Substantial interpopulation differences were found between the Om and S (F st = 0.16) and between the Om and Nw (F st = 0.20) populations, whereas between the S and Nw populations, these differences were small (F st = 0.05). Thus, it was demonstrated that the population of P. tritici-repentis from Omsk oblast had the independent status of the geographical population; northwest and North Caucasian populations differed in the allelic diversity of SSR loci, and despite the low F st value (0.05), they also belonged to independent geographical populations.
[Mh] Termos MeSH primário: Basidiomycota/genética
Loci Gênicos
Repetições de Microssatélites
Polimorfismo Genético
[Mh] Termos MeSH secundário: Federação Russa
[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


  6 / 8706 MEDLINE  
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[PMID]:28470627
[Au] Autor:Zhu H; Liu D; Wang Y; Ren D; Zheng L; Chen L; Ma A
[Ad] Endereço:College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
[Ti] Título:Use of the yeast-like cells of Tremella fuciformis as a cell factory to produce a Pleurotus ostreatus hydrophobin.
[So] Source:Biotechnol Lett;39(8):1167-1173, 2017 Aug.
[Is] ISSN:1573-6776
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: To obtain hydrophobin, a Class I hydrophobin gene, Po.hyd from Pleurotus ostreatus, was transformed into the yeast-like cells of Tremella fuciformis using Agrobacterium tumefaciens. RESULTS: The hydrophobin Po.HYD from P. ostreatus was heterogeneously expressed by the yeast-like cells of T. fuciformis. Plasmids harboring the Po.hyd gene driven by endogenous glyceraldehyde-3-phosphate dehydrogenase promoter were transformed by A. tumefaciens. The integration and expression of the rPo.HYD in the T. fuciformis cells were confirmed by PCR, Southern blot, fluorescence microscopy and quantitative real-time PCR. SDS-PAGE demonstrated that the rPo.HYD was extracted with the expected MW of 14 kDa. The yield of purified rPo.HYD was 0.58 mg/g dry wt. The protein, with its ability to stabilize oil droplets, exhibited a better emulsifying activity than the typical food emulsifiers Tween 20 and sodium caseinate. CONCLUSION: Tremella fuciformis can be used as a cell factory to produce hydrophobin on a large scale for the food industry.
[Mh] Termos MeSH primário: Agaricales/genética
Basidiomycota
Proteínas Fúngicas/genética
Proteínas Recombinantes/genética
[Mh] Termos MeSH secundário: Agrobacterium/genética
Basidiomycota/citologia
Basidiomycota/genética
Basidiomycota/metabolismo
Emulsificantes
Proteínas Fúngicas/metabolismo
Proteínas Recombinantes/metabolismo
Leveduras
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Emulsifying Agents); 0 (Fungal Proteins); 0 (Recombinant Proteins)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180202
[Lr] Data última revisão:
180202
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170505
[St] Status:MEDLINE
[do] DOI:10.1007/s10529-017-2343-0


  7 / 8706 MEDLINE  
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[PMID]:28457942
[Au] Autor:Orquera-Tornakian GK; Garrido P; Kronmiller B; Hunger R; Tyler BM; Garzon CD; Marek SM
[Ad] Endereço:Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078, United States. Electronic address: orquera@okstate.edu.
[Ti] Título:Identification and characterization of simple sequence repeats (SSRs) for population studies of Puccinia novopanici.
[So] Source:J Microbiol Methods;139:113-122, 2017 08.
[Is] ISSN:1872-8359
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Switchgrass (Panicum virgatum L.) can be severely affected by rust disease. Recently switchgrass rust caused by P. emaculata (now confirmed to be Puccinia novopanici) has received most of the attention by the research community because this pathogen is responsible for reducing the biomass production and biofuel feedstock quality of switchgrass. Microsatellite markers found in the literature were either not informative (no allele frequency) or showed few polymorphisms in the target populations, therefore additional markers are needed for future studies of the genetic variation and population structure of P. novopanici. This study reports the development and characterization of novel simple sequence repeat (SSR) markers from a Puccinia emaculata s.l. microsatellite-enriched library and expressed sequence tags (ESTs). Microsatellites were evaluated for polymorphisms on P. emaculata s.l. urediniospores collected in Iowa (IA), Mississippi (MS), Oklahoma (OK), South Dakota (SD) and Virginia (VA). Puccinia novopanici single spore whole genome amplifications were used as templates to validate the SSR reactions protocol and to assess a preliminary population genetics statistics of the pathogen. Eighteen microsatellite markers were polymorphic (average PIC=0.72) on individual urediniospores, with an average of 8.3 alleles per locus (range 3 to 17). Of the 49 SSRs loci initially identified in P. emaculata s.l., 18 were transferable to P. striiformis f. sp. tritici, 23 to P. triticina, 20 to P. sorghi and 31 to P. andropogonis. Thus, these markers could be useful for DNA fingerprinting and population structure analysis for population genetics, epidemiology and ecological studies of P. novopanici and potentially other related Puccinia species.
[Mh] Termos MeSH primário: Basidiomycota/genética
Genoma Fúngico
Repetições de Microssatélites
Reação em Cadeia da Polimerase/métodos
[Mh] Termos MeSH secundário: Basidiomycota/classificação
Basidiomycota/crescimento & desenvolvimento
Basidiomycota/patogenicidade
Etiquetas de Sequências Expressas
Biblioteca Gênica
Marcadores Genéticos
Variação Genética
Iowa
Tipagem Molecular
Polimorfismo Genético
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Genetic Markers)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180126
[Lr] Data última revisão:
180126
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


  8 / 8706 MEDLINE  
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[PMID]:29267335
[Au] Autor:Milczarski P; Masojc P; Krajewski P; Stochmal A; Kowalczyk M; Angelov M; Ivanova V; Schollenberger M; Wakulinski W; Banaszak Z; Banaszak K; Rakoczy-Trojanowska M
[Ad] Endereço:West Pomeranian University of Technology, Szczecin, Poland.
[Ti] Título:QTL mapping for benzoxazinoid content, preharvest sprouting, α-amylase activity, and leaf rust resistance in rye (Secale cereale L.).
[So] Source:PLoS One;12(12):e0189912, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Mapping population of recombinant inbred lines (RILs) representing 541 × Ot1-3 cross exhibited wide variations of benzoxazinoid (BX) content in leaves and roots, brown rust resistance, α-amylase activity in the grain, and resistance to preharvest sprouting. QTL mapping of major BX species using a DArT-based map revealed a complex genetic architecture underlying the production of these main secondary metabolites engaged in stress and allelopathy responses. The synthesis of BX in leaves and roots was found to be regulated by different QTL. The QTL for the BX content, rust resistance, α-amylase activity, and preharvest sprouting partially overlapped; this points to their common genetic regulation by a definite subset of genes. Only one QTL for BX located on chromosome 7R coincided with the loci of the ScBx genes, which were mapped as two clusters on chromosomes 5RS (Bx3-Bx5) and 7R (Bx1-Bx2). The QTL common for several BX species, rust resistance, preharvest sprouting, and α-amylase activity are interesting objects for further exploration aimed at developing common markers for these important agronomic traits.
[Mh] Termos MeSH primário: Basidiomycota/patogenicidade
Benzoxazinas/metabolismo
Folhas de Planta/microbiologia
Locos de Características Quantitativas
Secale/microbiologia
alfa-Amilases/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Benzoxazines); EC 3.2.1.1 (alpha-Amylases)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189912


  9 / 8706 MEDLINE  
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[PMID]:29261746
[Au] Autor:Pan R; Xu L; Wei Q; Wu C; Tang W; Oelmüller R; Zhang W
[Ad] Endereço:Hubei Collaborative Innovation Center for Grain Industry/ Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou, China.
[Ti] Título:Piriformospora indica promotes early flowering in Arabidopsis through regulation of the photoperiod and gibberellin pathways.
[So] Source:PLoS One;12(12):e0189791, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Flowering in plants is synchronized by both environmental cues and internal regulatory factors. Previous studies have shown that the endophytic fungus Piriformospora indica promotes the growth and early flowering in Coleus forskohlii (a medicinal plant) and Arabidopsis. To further dissect the impact of P. indica on pathways responsible for flowering time in Arabidopsis, we co-cultivated Arabidopsis with P. indica and used RT-qPCR to analyze the main gene regulation networks involved in flowering. Our results revealed that the symbiotic interaction of Arabidopsis with P. indica promotes early flower development and the number of siliques. In addition, expression of the core flowering regulatory gene FLOWERING LOCUS T (FT), of genes controlling the photoperiod [CRYPTOCHROMES (CRY1, CRY2) and PHYTOCHROME B (PHYB)] and those related to gibberellin (GA) functions (RGA1, AGL24, GA3, and MYB5) were induced by the fungus, while key genes controlling the age and autonomous pathways remained unchanged. Moreover, early flowering promotion conferred by P. indica was promoted by exogenous GA and inhabited by GA inhibitor, and this effect could be observed under long day and neutral day photoperiod. Therefore, our data suggested that P. indica promotes early flowering in Arabidopsis likely through photoperiod and GA rather than age or the autonomous pathway.
[Mh] Termos MeSH primário: Arabidopsis/microbiologia
Arabidopsis/fisiologia
Basidiomycota/fisiologia
Flores/fisiologia
Giberelinas/metabolismo
Fotoperíodo
[Mh] Termos MeSH secundário: Arabidopsis/genética
Arabidopsis/crescimento & desenvolvimento
Flores/efeitos dos fármacos
Flores/genética
Regulação da Expressão Gênica de Plantas/efeitos dos fármacos
Giberelinas/farmacologia
Fenótipo
Desenvolvimento Vegetal/efeitos dos fármacos
Desenvolvimento Vegetal/genética
Solo
Fatores de Tempo
Triazóis/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Gibberellins); 0 (Soil); 0 (Triazoles); R4ATA06H50 (uniconazole)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171221
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189791


  10 / 8706 MEDLINE  
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[PMID]:29253026
[Au] Autor:Pino-Bodas R; Laakso I; Stenroos S
[Ad] Endereço:Real Jardín Botánico de Madrid, CSIC, Madrid, Spain.
[Ti] Título:Genetic variation and factors affecting the genetic structure of the lichenicolous fungus Heterocephalacria bachmannii (Filobasidiales, Basidiomycota).
[So] Source:PLoS One;12(12):e0189603, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Heterocephalacria bachmannii is a lichenicolous fungus that takes as hosts numerous lichen species of the genus Cladonia. In the present study we analyze whether the geographical distance, the host species or the host secondary metabolites determine the genetic structure of this parasite. To address the question, populations mainly from the Southern Europe, Southern Finland and the Azores were sampled. The specimens were collected from 20 different host species representing ten chemotypes. Three loci, ITS rDNA, LSU rDNA and mtSSU, were sequenced. The genetic structure was assessed by AMOVA, redundance analyses and Bayesian clustering methods. The results indicated that the host species and the host secondary metabolites are the most influential factors over the genetic structure of this lichenicolous fungus. In addition, the genetic structure of H. bachmannii was compared with that of one of its hosts, Cladonia rangiformis. The population structure of parasite and host were discordant. The contents in phenolic compounds and fatty acids of C. rangiformis were quantified in order to test whether it had some influence on the genetic structure of the species. But no correlation was found with the genetic clusters of H. bachmannii.
[Mh] Termos MeSH primário: Basidiomycota/genética
Variação Genética
Líquens/microbiologia
[Mh] Termos MeSH secundário: Ascomicetos/genética
Teorema de Bayes
DNA Fúngico/genética
DNA Intergênico
Geografia
Haplótipos
Especificidade de Hospedeiro
Interações Hospedeiro-Patógeno
Família Multigênica
Filogenia
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Fungal); 0 (DNA, Intergenic)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189603



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