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[PMID]:28940006
[Au] Autor:Kokubun T
[Ad] Endereço:Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK. t.kokubun@kew.org.
[Ti] Título:Occurrence of myo-inositol and alkyl-substituted polysaccharide in the prey-trapping mucilage of Drosera capensis.
[So] Source:Naturwissenschaften;104(9-10):83, 2017 Sep 22.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The chemical composition of the exudate mucilage droplets of the carnivorous plant Drosera capensis was investigated using nuclear magnetic resonance spectroscopy. The mucilage was found to contain beside a very large molecular weight polysaccharide a significant amount of myo-inositol. It appears that myo-inositol escaped detection due to the commonly applied methodology on the chemical analysis of plant mucilage, such as dialysis, precipitation of polysaccharide component with alcohol, acid hydrolysis and detection of the resultant monosaccharide (aldose) units. The possible functions of myo-inositol in the mucilage droplets and the fate after being washed off from the leaf tentacles are proposed. On the polysaccharide component, the presence of methyl ester and alkyl chain-like moieties could be confirmed. These lipophilic moieties may provide the prey-trapping mucilage with the unique adhesive property onto the hydrophobic insect body parts, as well as onto the nature's well-known superhydrophobic surfaces such as the leaves of the sacred lotus plants. A re-evaluation of the mineral components of the mucilage, reported 40 years ago, is presented from the viewpoints of the current result and plants' natural habitat. A case for re-examination of the well-studied plant mucilaginous materials is made in light of the new findings.
[Mh] Termos MeSH primário: Drosera
[Mh] Termos MeSH secundário: Animais
Inositol
Insetos
Folhas de Planta
Polissacarídeos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polysaccharides); 4L6452S749 (Inositol)
[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:170924
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-017-1502-4


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[PMID]:28040565
[Au] Autor:Unhelkar MH; Duong VT; Enendu KN; Kelly JE; Tahir S; Butts CT; Martin RW
[Ad] Endereço:Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA.
[Ti] Título:Structure prediction and network analysis of chitinases from the Cape sundew, Drosera capensis.
[So] Source:Biochim Biophys Acta;1861(3):636-643, 2017 03.
[Is] ISSN:0006-3002
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Carnivorous plants possess diverse sets of enzymes with novel functionalities applicable to biotechnology, proteomics, and bioanalytical research. Chitinases constitute an important class of such enzymes, with future applications including human-safe antifungal agents and pesticides. Here, we compare chitinases from the genome of the carnivorous plant Drosera capensis to those from related carnivorous plants and model organisms. METHODS: Using comparative modeling, in silico maturation, and molecular dynamics simulation, we produce models of the mature enzymes in aqueous solution. We utilize network analytic techniques to identify similarities and differences in chitinase topology. RESULTS: Here, we report molecular models and functional predictions from protein structure networks for eleven new chitinases from D. capensis, including a novel class IV chitinase with two active domains. This architecture has previously been observed in microorganisms but not in plants. We use a combination of comparative and de novo structure prediction followed by molecular dynamics simulation to produce models of the mature forms of these proteins in aqueous solution. Protein structure network analysis of these and other plant chitinases reveal characteristic features of the two major chitinase families. GENERAL SIGNIFICANCE: This work demonstrates how computational techniques can facilitate quickly moving from raw sequence data to refined structural models and comparative analysis, and to select promising candidates for subsequent biochemical characterization. This capability is increasingly important given the large and growing body of data from high-throughput genome sequencing, which makes experimental characterization of every target impractical.
[Mh] Termos MeSH primário: Quitinases/genética
Quitinases/metabolismo
Drosera/genética
Drosera/metabolismo
[Mh] Termos MeSH secundário: Genoma de Planta/genética
Modelos Moleculares
Simulação de Dinâmica Molecular
Filogenia
Domínios Proteicos/genética
[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:
EC 3.2.1.14 (Chitinases)
[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:170102
[St] Status:MEDLINE


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[PMID]:27761648
[Au] Autor:Jopcik M; Moravcikova J; Matusikova I; Bauer M; Rajninec M; Libantova J
[Ad] Endereço:Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, P.O. Box 39A, 950 07, Nitra, Slovak Republic.
[Ti] Título:Structural and functional characterisation of a class I endochitinase of the carnivorous sundew (Drosera rotundifolia L.).
[So] Source:Planta;245(2):313-327, 2017 Feb.
[Is] ISSN:1432-2048
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:MAIN CONCLUSION: Chitinase gene from the carnivorous plant, Drosera rotundifolia , was cloned and functionally characterised. Plant chitinases are believed to play an important role in the developmental and physiological processes and in responses to biotic and abiotic stress. In addition, there is growing evidence that carnivorous plants can use them to digest insect prey. In this study, a full-length genomic clone consisting of the 1665-bp chitinase gene (gDrChit) and adjacent promoter region of the 698 bp in length were isolated from Drosera rotundifolia L. using degenerate PCR and a genome-walking approach. The corresponding coding sequence of chitinase gene (DrChit) was obtained following RNA isolation from the leaves of aseptically grown in vitro plants, cDNA synthesis with a gene-specific primer and PCR amplification. The open reading frame of cDNA clone consisted of 978 nucleotides and encoded 325 amino acid residues. Sequence analysis indicated that DrChit belongs to the class I group of plant chitinases. Phylogenetic analysis within the Caryophyllales class I chitinases demonstrated a significant evolutionary relatedness of DrChit with clade Ib, which contains the extracellular orthologues that play a role in carnivory. Comparative expression analysis revealed that the DrChit is expressed predominantly in tentacles and is up-regulated by treatment with inducers that mimick insect prey. Enzymatic activity of rDrChit protein expressed in Escherichia coli was confirmed and purified protein exhibited a long oligomer-specific endochitinase activity on glycol-chitin and FITC-chitin. The isolation and expression profile of a chitinase gene from D. rotundifolia has not been reported so far. The obtained results support the role of specific chitinases in digestive processes in carnivorous plant species.
[Mh] Termos MeSH primário: Quitinases/genética
Quitinases/metabolismo
Drosera/enzimologia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
[Mh] Termos MeSH secundário: Animais
Clonagem Molecular
Drosera/genética
Regulação Enzimológica da Expressão Gênica
Regulação da Expressão Gênica de Plantas
Insetos
Comportamento Predatório
Proteínas Recombinantes/genética
Proteínas Recombinantes/metabolismo
Análise de Sequência de Proteína
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 0 (Recombinant Proteins); EC 3.2.1.14 (Chitinases)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161021
[St] Status:MEDLINE
[do] DOI:10.1007/s00425-016-2608-1


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[PMID]:27580619
[Au] Autor:Michalko J; Renner T; Mészáros P; Socha P; Moravcíková J; Blehová A; Libantová J; Polóniová Z; Matusíková I
[Ad] Endereço:Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Akademická 2, P.O. Box 39A, 950 07, Nitra, Slovak Republic.
[Ti] Título:Molecular characterization and evolution of carnivorous sundew (Drosera rotundifolia L.) class V ß-1,3-glucanase.
[So] Source:Planta;245(1):77-91, 2017 Jan.
[Is] ISSN:1432-2048
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:MAIN CONCLUSION: A gene for ß-1,3-glucanase was isolated from carnivorous sundew. It is active in leaves and roots, but not in digestive glands. Analyses in transgenic tobacco suggest its function in germination. Ancestral plant ß-1,3-glucanases (EC 3.2.1.39) played a role in cell division and cell wall remodelling, but divergent evolution has extended their roles in plant defense against stresses to decomposition of prey in carnivorous plants. As available gene sequences from carnivorous plants are rare, we isolated a glucanase gene from roundleaf sundew (Drosera rotundifolia L.) by a genome walking approach. Computational predictions recognized typical gene features and protein motifs described for other plant ß-1,3-glucanases. Phylogenetic reconstructions suggest strong support for evolutionary relatedness to class V ß-1,3-glucanases, including homologs that are active in the traps of related carnivorous species. The gene is expressed in sundew vegetative tissues but not in flowers and digestive glands, and encodes for a functional enzyme when expressed in transgenic tobacco. Detailed analyses of the supposed promoter both in silico and in transgenic tobacco suggest that this glucanase plays a role in development. Specific spatiotemporal activity was observed during transgenic seed germination. Later during growth, the sundew promoter was active in marginal and sub-marginal areas of apical true leaf meristems of young tobacco plants. These results suggest that the isolated glucanase gene is regulated endogenously, possibly by auxin. This is the first report on a nuclear gene study from sundew.
[Mh] Termos MeSH primário: Drosera/enzimologia
Evolução Molecular
Glucana 1,3-beta-Glucosidase/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Simulação por Computador
Drosera/genética
Genes de Plantas
Glucana 1,3-beta-Glucosidase/química
Glucana 1,3-beta-Glucosidase/metabolismo
Glucuronidase/metabolismo
Motivos de Nucleotídeos
Filogenia
Plantas Geneticamente Modificadas
Regiões Promotoras Genéticas/genética
Alinhamento de Sequência
Estresse Fisiológico/genética
Tabaco/genética
Fatores de Transcrição/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Transcription Factors); EC 3.2.1.31 (Glucuronidase); EC 3.2.1.58 (Glucan 1,3-beta-Glucosidase)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171005
[Lr] Data última revisão:
171005
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160902
[St] Status:MEDLINE
[do] DOI:10.1007/s00425-016-2592-5


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[PMID]:27353064
[Au] Autor:Butts CT; Bierma JC; Martin RW
[Ad] Endereço:Department of Electrical Engineering and Computer Science, UC Irvine, Irvine, California, 92697. rwmartin@uci.edu.
[Ti] Título:Novel proteases from the genome of the carnivorous plant Drosera capensis: Structural prediction and comparative analysis.
[So] Source:Proteins;84(10):1517-33, 2016 Oct.
[Is] ISSN:1097-0134
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In his 1875 monograph on insectivorous plants, Darwin described the feeding reactions of Drosera flypaper traps and predicted that their secretions contained a "ferment" similar to mammalian pepsin, an aspartic protease. Here we report a high-quality draft genome sequence for the cape sundew, Drosera capensis, the first genome of a carnivorous plant from order Caryophyllales, which also includes the Venus flytrap (Dionaea) and the tropical pitcher plants (Nepenthes). This species was selected in part for its hardiness and ease of cultivation, making it an excellent model organism for further investigations of plant carnivory. Analysis of predicted protein sequences yields genes encoding proteases homologous to those found in other plants, some of which display sequence and structural features that suggest novel functionalities. Because the sequence similarity to proteins of known structure is in most cases too low for traditional homology modeling, 3D structures of representative proteases are predicted using comparative modeling with all-atom refinement. Although the overall folds and active residues for these proteins are conserved, we find structural and sequence differences consistent with a diversity of substrate recognition patterns. Finally, we predict differences in substrate specificities using in silico experiments, providing targets for structure/function studies of novel enzymes with biological and technological significance. Proteins 2016; 84:1517-1533. © 2016 Wiley Periodicals, Inc.
[Mh] Termos MeSH primário: Carnivoridade/fisiologia
Drosera/genética
Droseraceae/genética
Genoma de Planta
Peptídeo Hidrolases/química
Proteínas de Plantas/química
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Domínio Catalítico
Mapeamento de Sequências Contíguas
Drosera/classificação
Droseraceae/classificação
Sequenciamento de Nucleotídeos em Larga Escala
Simulação de Acoplamento Molecular
Anotação de Sequência Molecular
Peptídeo Hidrolases/genética
Peptídeo Hidrolases/metabolismo
Filogenia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Domínios Proteicos
Dobramento de Proteína
Estrutura Secundária de Proteína
Alinhamento de Sequência
Homologia Estrutural de Proteína
Especificidade por Substrato
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); EC 3.4.- (Peptide Hydrolases)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171001
[Lr] Data última revisão:
171001
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160630
[St] Status:MEDLINE
[do] DOI:10.1002/prot.25095


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[PMID]:27144980
[Au] Autor:Fleischmann A; Rivadavia F; Gonella PM; Pérez-Bañón C; Mengual X; Rojo S
[Ad] Endereço:Botanische Staatssammlung München, Munich, Germany.
[Ti] Título:Where Is My Food? Brazilian Flower Fly Steals Prey from Carnivorous Sundews in a Newly Discovered Plant-Animal Interaction.
[So] Source:PLoS One;11(5):e0153900, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A new interaction between insects and carnivorous plants is reported from Brazil. Larvae of the predatory flower fly Toxomerus basalis (Diptera: Syrphidae: Syrphinae) have been found scavenging on the sticky leaves of several carnivorous sundew species (Drosera, Droseraceae) in Minas Gerais and São Paulo states, SE Brazil. This syrphid apparently spends its whole larval stage feeding on prey trapped by Drosera leaves. The nature of this plant-animal relationship is discussed, as well as the Drosera species involved, and locations where T. basalis was observed. 180 years after the discovery of this flower fly species, its biology now has been revealed. This is (1) the first record of kleptoparasitism in the Syrphidae, (2) a new larval feeding mode for this family, and (3) the first report of a dipteran that shows a kleptoparasitic relationship with a carnivorous plant with adhesive flypaper traps. The first descriptions of the third instar larva and puparium of T. basalis based on Scanning Electron Microscope analysis are provided.
[Mh] Termos MeSH primário: Carnivoridade/fisiologia
Dípteros/fisiologia
Drosera/fisiologia
Flores/fisiologia
[Mh] Termos MeSH secundário: Animais
Brasil
Alimentos
Larva/fisiologia
Folhas de Planta/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160505
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0153900


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[PMID]:27061175
[Au] Autor:Jennings DE; Krupa JJ; Rohr JR
[Ad] Endereço:Department of Integrative Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, FL, 33620, USA.
[Ti] Título:Foraging modality and plasticity in foraging traits determine the strength of competitive interactions among carnivorous plants, spiders and toads.
[So] Source:J Anim Ecol;85(4):973-81, 2016 07.
[Is] ISSN:1365-2656
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Foraging modalities (e.g. passive, sit-and-wait, active) and traits are plastic in some species, but the extent to which this plasticity affects interspecific competition remains unclear. Using a long-term laboratory mesocosm experiment, we quantified competition strength and the plasticity of foraging traits in a guild of generalist predators of arthropods with a range of foraging modalities. Each mesocosm contained eight passively foraging pink sundews, and we employed an experimental design where treatments were the presence or absence of a sit-and-wait foraging spider and actively foraging toad crossed with five levels of prey abundance. We hypothesized that actively foraging toads would outcompete the other species at low prey abundance, but that spiders and sundews would exhibit plasticity in foraging traits to compensate for strong competition when prey were limited. Results generally supported our hypotheses. Toads had a greater effect on sundews at low prey abundances, and toad presence caused spiders to locate webs higher above the ground. Additionally, the closer large spider webs were to the ground, the greater the trichome densities produced by sundews. Also, spider webs were larger with than without toads and as sundew numbers increased, and these effects were more prominent as resources became limited. Finally, spiders negatively affected toad growth only at low prey abundance. These findings highlight the long-term importance of foraging modality and plasticity of foraging traits in determining the strength of competition within and across taxonomic kingdoms. Future research should assess whether plasticity in foraging traits helps to maintain coexistence within this guild and whether foraging modality can be used as a trait to reliably predict the strength of competitive interactions.
[Mh] Termos MeSH primário: Comportamento Apetitivo
Bufonidae/crescimento & desenvolvimento
Comportamento Competitivo/fisiologia
Folhas de Planta/crescimento & desenvolvimento
Aranhas/fisiologia
[Mh] Termos MeSH secundário: Animais
Drosera
Ecossistema
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170427
[Lr] Data última revisão:
170427
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160411
[St] Status:MEDLINE
[do] DOI:10.1111/1365-2656.12526


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[PMID]:26998942
[Au] Autor:Pavlovic A; Krausko M; Adamec L
[Ad] Endereço:Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Slechtitelu 27, CZ-783 71, Olomouc, Czech Republic; Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, Mlynská dolina, SK-842 15, Bratislava, Slovakia. Electronic address: andrej.pavlovic@upol.cz.
[Ti] Título:A carnivorous sundew plant prefers protein over chitin as a source of nitrogen from its traps.
[So] Source:Plant Physiol Biochem;104:11-6, 2016 Jul.
[Is] ISSN:1873-2690
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:Carnivorous plants have evolved in nutrient-poor wetland habitats. They capture arthropod prey, which is an additional source of plant growth limiting nutrients. One of them is nitrogen, which occurs in the form of chitin and proteins in prey carcasses. In this study, the nutritional value of chitin and protein and their digestion traits in the carnivorous sundew Drosera capensis L. were estimated using stable nitrogen isotope abundance. Plants fed on chitin derived 49% of the leaf nitrogen from chitin, while those fed on the protein bovine serum albumin (BSA) derived 70% of its leaf nitrogen from this. Moreover, leaf nitrogen content doubled in protein-fed in comparison to chitin-fed plants indicating that the proteins were digested more effectively in comparison to chitin and resulted in significantly higher chlorophyll contents. The surplus chlorophyll and absorbed nitrogen from the protein digestion were incorporated into photosynthetic proteins - the light harvesting antennae of photosystem II. The incorporation of insect nitrogen into the plant photosynthetic apparatus may explain the increased rate of photosynthesis and plant growth after feeding. This general response in many genera of carnivorous plants has been reported in many previous studies.
[Mh] Termos MeSH primário: Quitina/farmacologia
Drosera/metabolismo
Nitrogênio/farmacologia
Soroalbumina Bovina/farmacologia
[Mh] Termos MeSH secundário: Animais
Biomassa
Bovinos
Drosera/efeitos dos fármacos
Isótopos de Nitrogênio
Pigmentos Biológicos/metabolismo
Folhas de Planta/efeitos dos fármacos
Folhas de Planta/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Nitrogen Isotopes); 0 (Pigments, Biological); 1398-61-4 (Chitin); 27432CM55Q (Serum Albumin, Bovine); N762921K75 (Nitrogen)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160322
[St] Status:MEDLINE


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[PMID]:26895872
[Au] Autor:Fu SF; Sun PF; Lu HY; Wei JY; Xiao HS; Fang WT; Cheng BY; Chou JY
[Ad] Endereço:Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
[Ti] Título:Plant growth-promoting traits of yeasts isolated from the phyllosphere and rhizosphere of Drosera spatulata Lab.
[So] Source:Fungal Biol;120(3):433-48, 2016 Mar.
[Is] ISSN:1878-6146
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Microorganisms can promote plant growth through direct and indirect mechanisms. Compared with the use of bacteria and mycorrhizal fungi, the use of yeasts as plant growth-promoting (PGP) agents has not been extensively investigated. In this study, yeast isolates from the phyllosphere and rhizosphere of the medicinally important plant Drosera spatulata Lab. were assessed for their PGP traits. All isolates were tested for indole-3-acetic acid-, ammonia-, and polyamine-producing abilities, calcium phosphate and zinc oxide solubilizing ability, and catalase activity. Furthermore, the activities of siderophore, 1-aminocyclopropane-1-carboxylate deaminase, and fungal cell wall-degrading enzymes were assessed. The antagonistic action of yeasts against pathogenic Glomerella cingulata was evaluated. The cocultivation of Nicotiana benthamiana with yeast isolates enhanced plant growth, indicating a potential yeast-plant interaction. Our study results highlight the potential use of yeasts as plant biofertilizers under controlled and field conditions.
[Mh] Termos MeSH primário: Drosera/microbiologia
Desenvolvimento Vegetal
Reguladores de Crescimento de Planta/metabolismo
Folhas de Planta/microbiologia
Rizosfera
Microbiologia do Solo
Leveduras/fisiologia
[Mh] Termos MeSH secundário: Antifúngicos/farmacologia
Colletotrichum/efeitos dos fármacos
Tabaco/crescimento & desenvolvimento
Tabaco/microbiologia
Leveduras/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antifungal Agents); 0 (Plant Growth Regulators)
[Em] Mês de entrada:1611
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160221
[St] Status:MEDLINE


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[PMID]:26888545
[Au] Autor:El-Sayed AM; Byers JA; Suckling DM
[Ad] Endereço:The New Zealand Institute for Plant &Food Research Limited Gerald Street, 7608 Lincoln, New Zealand.
[Ti] Título:Pollinator-prey conflicts in carnivorous plants: When flower and trap properties mean life or death.
[So] Source:Sci Rep;6:21065, 2016 Feb 18.
[Is] ISSN:2045-2322
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Insect-pollinated carnivorous plants are expected to have higher fitness if they resolve pollinator-prey conflicts by sparing insects pollinating their flowers while trapping prey insects. We examined whether separation between flowers and traps of the carnivorous sundew species or pollinator preferences for colours of flowers enable these plants to spare pollinators. In addition, we collected odours from flowers and traps of each carnivorous species in order to identify volatile chemicals that are attractive or repellent to pollinators and prey insects. In Drosera spatulata and D. arcturi, no volatiles were detected from either their flowers or traps that could serve as kairomone attractants for insects. However, behavioural experiments indicated white colour and spatial separation between flowers and traps aid in reducing pollinator entrapment while capturing prey. In contrast, D. auriculata have flowers that are adjacent to their traps. In this species we identified chemical signals emanating from flowers that comprised an eight-component blend, while the plant's traps emitted a unique four-component blend. The floral odour attracted both pollinator and prey insects, while trap odour only attracted prey. This is the first scientific report to demonstrate that carnivorous plants utilize visual, spatial, and chemical signals to spare flower visitors while trapping prey insects.
[Mh] Termos MeSH primário: Drosera/fisiologia
Flores/fisiologia
Insetos
Polinização/fisiologia
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1612
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160219
[St] Status:MEDLINE
[do] DOI:10.1038/srep21065



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