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Pesquisa : B01.650.940.800.575.912.250.157.187 [Categoria DeCS]
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[PMID]:27886152
[Au] Autor:Khakimov B; Tseng LH; Godejohann M; Bak S; Engelsen SB
[Ad] Endereço:Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 16, DK-1958 Frederiksberg C, Denmark. bzo@food.ku.dk.
[Ti] Título:Screening for Triterpenoid Saponins in Plants Using Hyphenated Analytical Platforms.
[So] Source:Molecules;21(12), 2016 Nov 24.
[Is] ISSN:1420-3049
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Recently the number of studies investigating triterpenoid saponins has drastically increased due to their diverse and potentially attractive biological activities. Currently the literature contains chemical structures of few hundreds of triterpenoid saponins of plant and animal origin. Triterpenoid saponins consist of a triterpene aglycone with one or more sugar moieties attached to it. However, due to similar physico-chemical properties, isolation and identification of a large diversity of triterpenoid saponins remain challenging. This study demonstrates a methodology to screen saponins using hyphenated analytical platforms, GC-MS, LC-MS/MS, and LC-SPE-NMR/MS, in the example of two different phenotypes of the model plant (winter cress), glabrous (G) and pubescent (P) type that are known to differ by their insect resistance. The proposed methodology allows for detailed comparison of saponin profiles from intact plant extracts as well as saponin aglycone profiles from hydrolysed samples. Continuously measured 1D proton NMR data during LC separation along with mass spectrometry data revealed significant differences, including contents of saponins, types of aglycones and numbers of sugar moieties attached to the aglycone. A total of 49 peaks were tentatively identified as saponins from both plants; they are derived from eight types of aglycones and with 2-5 sugar moieties. Identification of two previously known insect-deterrent saponins, hederagenin cellobioside and oleanolic acid cellobioside, demonstrated the applicability of the methodology for relatively rapid screening of bioactive compounds.
[Mh] Termos MeSH primário: Barbarea/química
Cromatografia Líquida/métodos
Cromatografia Gasosa-Espectrometria de Massas/métodos
Ressonância Magnética Nuclear Biomolecular/métodos
Saponinas/química
Triterpenos/química
[Mh] Termos MeSH secundário: Ácido Oleanólico/análogos & derivados
Ácido Oleanólico/química
Folhas de Planta/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Saponins); 0 (Triterpenes); 6SMK8R7TGJ (Oleanolic Acid); RQF57J8212 (hederagenin)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170428
[Lr] Data última revisão:
170428
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161126
[St] Status:MEDLINE


  2 / 43 MEDLINE  
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[PMID]:27743600
[Au] Autor:Olsen CE; Huang XC; Hansen CI; Cipollini D; Ørgaard M; Matthes A; Geu-Flores F; Koch MA; Agerbirk N
[Ad] Endereço:Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
[Ti] Título:Glucosinolate diversity within a phylogenetic framework of the tribe Cardamineae (Brassicaceae) unraveled with HPLC-MS/MS and NMR-based analytical distinction of 70 desulfoglucosinolates.
[So] Source:Phytochemistry;132:33-56, 2016 Dec.
[Is] ISSN:1873-3700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:As a basis for future investigations of evolutionary trajectories and biosynthetic mechanisms underlying variations in glucosinolate structures, we screened members of the crucifer tribe Cardamineae by HPLC-MS/MS, isolated and identified glucosinolates by NMR, searched the literature for previous data for the tribe, and collected HPLC-MS/MS data for nearly all glucosinolates known from the tribe as well as some related structures (70 in total). This is a considerable proportion of the approximately 142 currently documented natural glucosinolates. Calibration with authentic references allowed distinction (or elucidation) of isomers in many cases, such as distinction of ß-hydroxyls, methylthios, methylsulfinyls and methylsulfonyls. A mechanism for fragmentation of secondary ß-hydroxyls in MS was elucidated, and two novel glucosinolates were discovered: 2-hydroxy-3-methylpentylglucosinolate in roots of Cardamine pratensis and 2-hydroxy-8-(methylsulfinyl)octylglucosinolate in seeds of Rorippa amphibia. A large number of glucosinolates (ca. 54 with high structural certainty and a further 28 or more suggested from tandem MS), representing a wide structural variation, is documented from the tribe. This included glucosinolates apparently derived from Met, Phe, Trp, Val/Leu, Ile and higher homologues. Normal side chain elongation and side chain decoration by oxidation or methylation was observed, as well as rare abnormal side chain decoration (hydroxylation of aliphatics at the δ rather than ß-position). Some species had diverse profiles, e.g. R. amphibia and C. pratensis (19 and 16 individual glucosinolates, respectively), comparable to total diversity in literature reports of Armoracia rusticana (17?), Barbarea vulgaris (20-24), and Rorippa indica (>20?). The ancestor or the tribe would appear to have used Trp, Met, and homoPhe as glucosinolate precursor amino acids, and to exhibit oxidation of thio to sulfinyl, formation of alkenyls, ß-hydroxylation of aliphatic chains and hydroxylation and methylation of indole glucosinolates. Two hotspots of apparent biochemical innovation and loss were identified: C. pratensis and the genus Barbarea. Diversity in other species mainly included structures also known from other crucifers. In addition to a role of gene duplication, two contrasting genetic/biochemical mechanisms for evolution of such combined diversity and redundancy are discussed: (i) involvement of widespread genes with expression varying during evolution, and (ii) mutational changes in substrate specificities of CYP79F and GS-OH enzymes.
[Mh] Termos MeSH primário: Brassicaceae/química
Glucosinolatos/análise
Filogenia
[Mh] Termos MeSH secundário: Barbarea/química
Cromatografia Líquida de Alta Pressão
Duplicação Gênica
Glucosinolatos/química
Seres Humanos
Estrutura Molecular
Sementes/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Glucosinolates)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170227
[Lr] Data última revisão:
170227
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161017
[St] Status:MEDLINE


  3 / 43 MEDLINE  
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[PMID]:26975314
[Au] Autor:Martínková J; Smilauer P; Mihulka S; Latzel V; Klimesová J
[Ad] Endereço:Institute of Botany, The Czech Academy of Sciences, Dukelská 135, 379 82 Trebon, Czech Republic, jana.martinkova@ibot.cas.cz.
[Ti] Título:The effect of injury on whole-plant senescence: an experiment with two root-sprouting Barbarea species.
[So] Source:Ann Bot;117(4):667-79, 2016 Apr.
[Is] ISSN:1095-8290
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND AND AIMS: Senescence is the process of losing fitness when growing old, and is shaped by the trade-off between maintenance and reproduction that makes reproduction more unsure and maintenance more costly with age. In repeatedly reproducing plants, reductions in growth and fertility are signs of senescence. Disturbance, however, provides an opportunity to reset the ageing clock and consequently potentially ameliorate senescence. METHODS: To test the effects of disturbance on traits closely related to fitness and thus to senescence, a long-term garden experiment was established with two short-lived perennial congeners,Barbarea vulgaris and Barbarea stricta, that differ in their ability to resprout after injury. In the experiment, five damage treatments were applied to plants in four different phenophases. KEY RESULTS: It was found that damage to the plant body significantly prolonged life span in B. vulgaris but decreased whole-life seed production in both species. High concentration of seed production in one growing season characterized short life spans. Both more severe damage and a more advanced phenological phase at the time of damage caused reproduction to be spread over more than one growing season and equalized per-season seed production. In terms of seed quality, average weight of a single seed decreased and seed germination rate increased with age regardless of damage. CONCLUSIONS: Although disturbance is able to reset the ageing clock of plants, it is so harmful to plant fitness that resprouting serves, at best, only to alleviate slightly the signs of senescence. Thus, in terms of whole-life seed production, injured plants were not more successful than uninjured ones in the two studied species. Indeed, in these species, injury only slightly postponed or decelerated senescence and did not cause effective rejuvenation.
[Mh] Termos MeSH primário: Barbarea/crescimento & desenvolvimento
Germinação
Raízes de Plantas/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Tamanho Corporal
Modelos Biológicos
Modelos Estatísticos
Reprodução
Sementes/crescimento & desenvolvimento
Especificidade da Espécie
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1612
[Cu] Atualização por classe:170403
[Lr] Data última revisão:
170403
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160316
[St] Status:MEDLINE
[do] DOI:10.1093/aob/mcw010


  4 / 43 MEDLINE  
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[PMID]:26857984
[Au] Autor:St Juliana JR; Mitchell WA
[Ad] Endereço:Indiana State University, Department of Biology, 200 North Seventh Street, Terre Haute, IN, 47809, USA. Electronic address: jstjuliana@sycamores.indstate.edu.
[Ti] Título:Optimal foraging behavior and the thermal neutral zone of Peromyscus leucopus during winter: A test using natural and controlled ambient temperatures.
[So] Source:J Therm Biol;56:109-12, 2016 Feb.
[Is] ISSN:0306-4565
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Endotherms foraging at temperatures outside of their thermal neutral zone (TNZ) pay an increased energetic cost. We asked if thermally-induced changes in foraging costs influence quitting harvest rate (QHR) of mice. We predicted that mice foraging during the winter would have a higher QHR in more costly colder conditions. We conducted our study with wild caught Peromyscus leucopus in an enclosure located in West Terre Haute, Indiana. We assayed changes in QHR using the forager's giving up density (GUD), which is the amount of uneaten seeds reaming in a tray after foraging activity. Each night from January 12th to March 13th, we assigned 4 trays as "cold trays" (at ambient temperature), and 4 trays as "hot trays" (trays with a ceramic heat element that increased the temperatures of feeding trays ca. 10-15°C). GUDs (and therfore QHRs) increased as a function of decreasing ambient temperature. Furthermore there was an interaction between tray temperature and ambient temperature; namely, on cool nights mice had lower GUDs in the "hot trays", but on warm nights mice had lower GUDs in the "cold trays". The TNZ for P. leucopus actively foraging during winter may be closer to the environmental average temperature than typically measured in the laboratory. Overall, these results support the idea that QHR is related to an animal's foraging in thermally challenged conditions. We present a unique way of measuring an animal's TNZ in the field using behavioral indicators.
[Mh] Termos MeSH primário: Comportamento Alimentar/fisiologia
Peromyscus/fisiologia
Estações do Ano
Temperatura Ambiente
[Mh] Termos MeSH secundário: Animais
Barbarea
Ambiente Controlado
Camundongos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160210
[St] Status:MEDLINE


  5 / 43 MEDLINE  
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[PMID]:26742611
[Au] Autor:Hadjilouka A; Molfeta C; Panagiotopoulou O; Paramithiotis S; Mataragas M; Drosinos EH
[Ad] Endereço:Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, GR-118 55 Athens, Greece.
[Ti] Título:Expression of Listeria monocytogenes key virulence genes during growth in liquid medium, on rocket and melon at 4, 10 and 30 °C.
[So] Source:Food Microbiol;55:7-15, 2016 May.
[Is] ISSN:1095-9998
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of the present study was to assess the expression of key virulence genes, during growth of a Listeria monocytogenes isolate in liquid medium, on melon and rocket at different temperatures and time. For that purpose, BHI broth, rocket and melon were inoculated at 7.0-7.5 log CFU mL(-1) or g(-1)and stored at 4, 10 and 30 °C. Sampling took place upon inoculation and after 0.5, 6 and 24 h of incubation. The RNA was stabilized and the expression of hly, plcA, plcB, sigB, inlA, inlB, inlC, inlJ, lmo2672 and lmo2470 was assessed by RT-qPCR. The results obtained were summarized into two observations; the first one referring to the interactive effect of incubation temperature and type of substrate and the second one to the effect of time on gene expression. Regarding the latter, nearly all genes were regulated upon inoculation and exhibited differential expression in the subsequent sampling times indicating the existence of additional regulatory mechanisms yet to be explored.
[Mh] Termos MeSH primário: Proteínas de Bactérias/genética
Barbarea/microbiologia
Cucurbitaceae/microbiologia
Meios de Cultura/análise
Frutas/microbiologia
Regulação Bacteriana da Expressão Gênica
Listeria monocytogenes/genética
Fatores de Virulência/genética
[Mh] Termos MeSH secundário: Proteínas de Bactérias/metabolismo
Listeria monocytogenes/crescimento & desenvolvimento
Listeria monocytogenes/metabolismo
Temperatura Ambiente
Fatores de Virulência/metabolismo
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Culture Media); 0 (Virulence Factors)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160109
[St] Status:MEDLINE


  6 / 43 MEDLINE  
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[PMID]:26333142
[Au] Autor:Khakimov B; Kuzina V; Erthmann PØ; Fukushima EO; Augustin JM; Olsen CE; Scholtalbers J; Volpin H; Andersen SB; Hauser TP; Muranaka T; Bak S
[Ad] Endereço:Department of Plant and Environmental Sciences, Copenhagen Plant Science Center, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, DK-1871, Denmark.
[Ti] Título:Identification and genome organization of saponin pathway genes from a wild crucifer, and their use for transient production of saponins in Nicotiana benthamiana.
[So] Source:Plant J;84(3):478-90, 2015 Nov.
[Is] ISSN:1365-313X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The ability to evolve novel metabolites has been instrumental for the defence of plants against antagonists. A few species in the Barbarea genus are the only crucifers known to produce saponins, some of which make plants resistant to specialist herbivores, like Plutella xylostella, the diamondback moth. Genetic mapping in Barbarea vulgaris revealed that genes for saponin biosynthesis are not clustered but are located in different linkage groups. Using co-location with quantitative trait loci (QTLs) for resistance, transcriptome and genome sequences, we identified two 2,3-oxidosqualene cyclases that form the major triterpenoid backbones. LUP2 mainly produces lupeol, and is preferentially expressed in insect-susceptible B. vulgaris plants, whereas LUP5 produces ß-amyrin and α-amyrin, and is preferentially expressed in resistant plants; ß-amyrin is the backbone for the resistance-conferring saponins in Barbarea. Two loci for cytochromes P450, predicted to add functional groups to the saponin backbone, were identified: CYP72As co-localized with insect resistance, whereas CYP716As did not. When B. vulgaris sapogenin biosynthesis genes were transiently expressed by CPMV-HT technology in Nicotiana benthamiana, high levels of hydroxylated and carboxylated triterpenoid structures accumulated, including oleanolic acid, which is a precursor of the major resistance-conferring saponins. When the B. vulgaris gene for sapogenin 3-O-glucosylation was co-expressed, the insect deterrent 3-O-oleanolic acid monoglucoside accumulated, as well as triterpene structures with up to six hexoses, demonstrating that N. benthamiana further decorates the monoglucosides. We argue that saponin biosynthesis in the Barbarea genus evolved by a neofunctionalized glucosyl transferase, whereas the difference between resistant and susceptible B. vulgaris chemotypes evolved by different expression of oxidosqualene cyclases (OSCs).
[Mh] Termos MeSH primário: Barbarea/genética
Barbarea/metabolismo
Saponinas/metabolismo
[Mh] Termos MeSH secundário: Sistema Enzimático do Citocromo P-450/genética
Sistema Enzimático do Citocromo P-450/metabolismo
Regulação da Expressão Gênica de Plantas
Genoma de Planta
Herbivoria
Transferases Intramoleculares/genética
Transferases Intramoleculares/metabolismo
Ácido Oleanólico/análogos & derivados
Ácido Oleanólico/metabolismo
Triterpenos Pentacíclicos/metabolismo
Filogenia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Plantas Geneticamente Modificadas
Locos de Características Quantitativas
Sapogeninas/metabolismo
Saponinas/genética
Tabaco/genética
Triterpenos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (3-O-oleanolic acid monoglucoside); 0 (Pentacyclic Triterpenes); 0 (Plant Proteins); 0 (Sapogenins); 0 (Saponins); 0 (Triterpenes); 6SMK8R7TGJ (Oleanolic Acid); 9035-51-2 (Cytochrome P-450 Enzyme System); EC 5.4.- (Intramolecular Transferases); EC 5.4.99.- (2,3-oxidosqualene-beta-amyrin-cyclase); KM8353IPSO (amyrin); O268W13H3O (lupeol)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151023
[Lr] Data última revisão:
151023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150903
[St] Status:MEDLINE
[do] DOI:10.1111/tpj.13012


  7 / 43 MEDLINE  
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[PMID]:26318326
[Au] Autor:Pedras MS; Alavi M; To QH
[Ad] Endereço:Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada. Electronic address: s.pedras@usask.ca.
[Ti] Título:Expanding the nasturlexin family: Nasturlexins C and D and their sulfoxides are phytoalexins of the crucifers Barbarea vulgaris and B. verna.
[So] Source:Phytochemistry;118:131-8, 2015 Oct.
[Is] ISSN:1873-3700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The metabolites produced in leaves of the crucifers winter cress (Barbarea vulgaris) and upland cress (Barbarea verna) abiotically elicited were investigated and their chemical structures were elucidated by analyses of spectroscopic data and confirmed by syntheses. Nasturlexins C and D and their sulfoxides are cruciferous phytoalexins displaying antifungal activity against the crucifer pathogens Alternaria brassicicola, Leptosphaeria maculans and Sclerotinia sclerotiorum. The biosynthesis of these metabolites is proposed based on pathways of cruciferous indolyl phytoalexins. This work indicates that B. vulgaris and B. verna have great potential as sources of defense pathways transferable to agriculturally important crops within the Brassica species.
[Mh] Termos MeSH primário: Barbarea/química
Sesquiterpenos/química
Sesquiterpenos/isolamento & purificação
Sulfóxidos/isolamento & purificação
[Mh] Termos MeSH secundário: Alternaria/metabolismo
Antifúngicos/química
Ascomicetos/metabolismo
Brassica/metabolismo
Ressonância Magnética Nuclear Biomolecular
Folhas de Planta/química
Sesquiterpenos/farmacologia
Sulfóxidos/química
Sulfóxidos/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antifungal Agents); 0 (Sesquiterpenes); 0 (Sulfoxides); 0 (nasturlexin C); 0 (nasturlexin D); 37297-20-4 (phytoalexins)
[Em] Mês de entrada:1606
[Cu] Atualização por classe:151003
[Lr] Data última revisão:
151003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150831
[St] Status:MEDLINE


  8 / 43 MEDLINE  
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[PMID]:26126637
[Au] Autor:Zhang X; Liu T; Wei X; Qiu Y; Song J; Wang H; Shen D; Agerbirk N; Li X
[Ad] Endereço:Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, Beijing, 100081, China. zhangxiaohui01@caas.cn.
[Ti] Título:Expression patterns, molecular markers and genetic diversity of insect-susceptible and resistant Barbarea genotypes by comparative transcriptome analysis.
[So] Source:BMC Genomics;16:486, 2015 Jul 01.
[Is] ISSN:1471-2164
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Barbarea vulgaris contains two genotypes: the glabrous type (G-type), which confers resistance to the diamondback moth (DBM) and other insect pests, and the pubescent type (P-type), which is susceptible to the DBM. Herein, the transcriptomes of P-type B. vulgaris before and after DBM infestation were subjected to Illumina (Solexa) pyrosequencing and comparative analysis. RESULTS: 5.0 gigabase pairs of clean nucleotides were generated. Non-redundant unigenes (33,721) were assembled and 94.1 % of them were annotated. Compared with our previous G-type transcriptome, the expression patterns of many insect responsive genes, including those related to secondary metabolism, phytohormones and transcription factors, which were significantly induced by DBM in G-type plants, were less sensitive to DBM infestation in P-type plants. The genes of the triterpenoid saponin pathway were identified in both G- and P-type plants. The upstream genes of the pathway showed similar expression patterns between the two genotypes. However, gene expression for two downstream enzymes, the glucosyl transferase (UGT73C11) and an oxidosqualene cyclase (OSC), were significantly upregulated in the P-type compared with the G-type plant. The homologous genes from P- and G-type plants were detected by BLAST unigenes with a cutoff level E-value < e(-10). 12,980 gene families containing 26,793 P-type and 36,944 G-type unigenes were shared by the two types of B. vulgaris. 38,397 single nucleotide polymorphisms (SNPs) were found in 9,452 orthologous genes between the P- and G-type plants. We also detected 5,105 simple sequence repeats (SSRs) in the B. vulgaris transcriptome, comprising mono-nucleotide-repeats (2,477; 48.5 %) and triple-nucleotide-repeats (1,590; 31.1 %). Of these, 1,657 SSRs displayed polymorphisms between the P- and G-type. Consequently, 913 SSR primer pairs were designed with a resolution of more than two nucleotides. We randomly chose 30 SSRs to detect the genetic diversity of 32 Barbarea germplasms. The distance tree showed that these accessions were clearly divided into groups, with the G-type grouping with available Western and Central European B. vulgaris accessions in contrast to the P-type accession, B. stricta and B. verna. CONCLUSIONS: These data represent useful information for pest-resistance gene mining and for the investigation of the molecular basis of plant-pest interactions.
[Mh] Termos MeSH primário: Barbarea/classificação
Barbarea/genética
Perfilação da Expressão Gênica/métodos
Mariposas/parasitologia
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Animais
Barbarea/parasitologia
Resistência à Doença
Regulação da Expressão Gênica de Plantas
Variação Genética
Sequenciamento de Nucleotídeos em Larga Escala
Repetições de Microssatélites
Filogenia
Análise de Sequência de RNA
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:150703
[Lr] Data última revisão:
150703
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150702
[St] Status:MEDLINE
[do] DOI:10.1186/s12864-015-1609-y


  9 / 43 MEDLINE  
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[PMID]:26001606
[Au] Autor:Kruidhof HM; Roberts AL; Magdaraog P; Muñoz D; Gols R; Vet LE; Hoffmeister TS; Harvey JA
[Ad] Endereço:Population and Evolutionary Ecology Group, University of Bremen, Bremen, Germany. marjolein.kruidhof@wur.nl.
[Ti] Título:Habitat complexity reduces parasitoid foraging efficiency, but does not prevent orientation towards learned host plant odours.
[So] Source:Oecologia;179(2):353-61, 2015 Oct.
[Is] ISSN:1432-1939
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:It is well known that many parasitic wasps use herbivore-induced plant odours (HIPVs) to locate their inconspicuous host insects, and are often able to distinguish between slight differences in plant odour composition. However, few studies have examined parasitoid foraging behaviour under (semi-)field conditions. In nature, food plants of parasitoid hosts are often embedded in non-host-plant assemblages that confer both structural and chemical complexity. By releasing both naïve and experienced Cotesia glomerata females in outdoor tents, we studied how natural vegetation surrounding Pieris brassicae-infested Sinapis arvensis and Barbarea vulgaris plants influences their foraging efficiency as well as their ability to specifically orient towards the HIPVs of the host plant species on which they previously had a positive oviposition experience. Natural background vegetation reduced the host-encounter rate of naïve C. glomerata females by 47 %. While associative learning of host plant HIPVs 1 day prior to foraging caused a 28 % increase in the overall foraging efficiency of C. glomerata, it did not reduce the negative influence of natural background vegetation. At the same time, however, females foraging in natural vegetation attacked more host patches on host-plant species on which they previously had a positive oviposition experience. We conclude that, even though the presence of natural vegetation reduces the foraging efficiency of C. glomerata, it does not prevent experienced female wasps from specifically orienting towards the host-plant species from which they had learned the HIPVs.
[Mh] Termos MeSH primário: Borboletas/parasitologia
Ecossistema
Herbivoria
Vespas/fisiologia
[Mh] Termos MeSH secundário: Animais
Barbarea/química
Borboletas/fisiologia
Comportamento Alimentar
Feminino
Interações Hospedeiro-Parasita
Larva/parasitologia
Larva/fisiologia
Odorantes
Oviposição
Sinapis/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1605
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150524
[St] Status:MEDLINE
[do] DOI:10.1007/s00442-015-3346-y


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[PMID]:25783488
[Au] Autor:Friberg M; Posledovich D; Wiklund C
[Ad] Endereço:Department of Plant Ecology and Evolution, Evolutionary Biology Centre, EBC, Norbyvägen 18D, 752 36, Uppsala, Sweden, magne.friberg@ebc.uu.se.
[Ti] Título:Decoupling of female host plant preference and offspring performance in relative specialist and generalist butterflies.
[So] Source:Oecologia;178(4):1181-92, 2015 Aug.
[Is] ISSN:1432-1939
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The preference-performance hypothesis posits that the host plant range of plant-feeding insects is ultimately limited by larval costs associated with feeding on multiple resources, and that female egg-laying preferences evolve in response to these costs. The trade-off of either using few host plant species and being a strong competitor on them due to effective utilization or using a wide host plant range but being a poor competitor is further predicted to result in host plant specialization. This follows under the hypothesis that both females and offspring are ultimately favoured by utilizing only the most suitable host(s). We develop an experimental approach to identify such trade-offs, i.e. larval costs associated with being a host generalist, and apply a suite of experiments to two sympatric and syntopic populations of the closely related butterflies Pieris napi and Pieris rapae. These butterflies show variation in their level of host specialization, which allowed comparisons between more and less specialized species and between families within species. Our results show that, first, the link between female host preference and offspring performance was not significantly stronger in the specialist compared to the generalist species. Second, the offspring of the host plant specialist did not outperform the offspring of the generalist on the former's most preferred host plant species. Finally, the more generalized species, or families within species, did not show higher survival or consistently higher growth rates than the specialists on the less preferred plants. Thus, the preference and performance traits appear to evolve as largely separated units.
[Mh] Termos MeSH primário: Barbarea
Evolução Biológica
Borboletas/fisiologia
Herbivoria
Oviposição
[Mh] Termos MeSH secundário: Animais
Feminino
Especificidade de Hospedeiro
Larva/fisiologia
Plantas
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1602
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150319
[St] Status:MEDLINE
[do] DOI:10.1007/s00442-015-3286-6



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