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Houel, E.; Nardella, F.; Jullian, V.; Valentin, A.; Vonthron-Sénécheau, C.; Villa, P.; Obrecht, A.; Kaiser, M.; Bourreau, E.; Odonne, G.; Fleury, M.; Bourdy, G.; Eparvier, V.; Deharo, E.; Stien, D. |
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Wayanin and guaijaverin, two active metabolites found in a Psidium acutangulum Mart. ex DC (syn. P. persoonii McVaugh) (Myrtaceae) antimalarial decoction from the Wayana Amerindians |
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2016 |
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Journal of Ethnopharmacology |
Abbreviated Journal |
Journal of Ethnopharmacology |
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187 |
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241-248 |
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Antimalarial; Cytokines; French guiana; Glycosylated flavonols; Psidium acutangulum; Traditional remedy |
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Ethnopharmacological relevance Psidium acutangulum Mart. ex DC is a small tree used by the Wayana Amerindians from the Upper-Maroni in French Guiana for the treatment of malaria. Aim of the study In a previous study, we highlighted the in vitro antiplasmodial, antioxidant and anti-inflammatory potential of the traditional decoction of P. acutangulum aerial parts. Our goal was then to investigate on the origin of the biological activity of the traditional remedy, and eventually characterize active constituents. Materials and methods Liquid-liquid extractions were performed on the decoction, and the antiplasmodial activity evaluated against chloroquine-resistant FcB1 ([3H]-hypoxanthine bioassay) and 7G8 (pLDH bioassay) P. falciparum strains, and on a chloroquine sensitive NF54 ([3H]-hypoxanthine bioassay) P. falciparum strain. The ethyl acetate fraction (D) was active and underwent bioguided fractionation. All the isolated compounds were tested on P. falciparum FcB1 strain. In vitro anti-inflammatory activity (IL-1β, IL-6, IL-8, TNFα) of the ethyl acetate fraction and of an anti-Plasmodium active compound, was concurrently assessed on LPS-stimulated human PBMC and NO secretion inhibition was measured on LPS stimulated RAW murine macrophages. Cytotoxicity of the fractions and pure compounds was measured on VERO cells, L6 mammalian cells, PBMCs, and RAW cells. Results Fractionation of the ethyl acetate soluble fraction (IC50 ranging from 3.4 to <1 μg/mL depending on the parasite strain) led to the isolation of six pure compounds: catechin and five glycosylated quercetin derivatives. These compounds have never been isolated from this plant species. Two of these compounds (wayanin and guaijaverin) were found to be moderately active against P. falciparum FcB1 in vitro (IC50 5.5 and 6.9 μM respectively). We proposed the name wayanin during public meetings organized in June 2015 in the Upper-Maroni villages, in homage to the medicinal knowledge of the Wayana population. At 50 μg/mL, the ethyl acetate fraction (D) significantly inhibited IL-1β secretion (-46%) and NO production (-21%), as previously observed for the decoction. The effects of D and guiajaverin (4) on the secretion of other cytokines or NO production were not significant. Conclusions The confirmed antiplasmodial activity of the ethyl acetate soluble fraction of the decoction and of the isolated compounds support the previous results obtained on the P. acutangulum decoction. The antiplasmodial activity might be due to a mixture of moderately active non-toxic flavonoids. The anti-inflammatory activities were less marked for ethyl acetate fraction (D) than for the decoction. © 2016 Elsevier Ireland Ltd. All rights reserved. |
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Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), Observatoire Océanologique, Banyuls/Mer, France |
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Export Date: 20 May 2016 |
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EcoFoG @ webmaster @ |
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679 |
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Leba, L.-J.; Popovici, J.; Estevez, Y.; Pelleau, S.; Legrand, E.; Musset, L.; Duplais, C. |
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Antiplasmodial activities of dyes against Plasmodium falciparum asexual and sexual stages: Contrasted uptakes of triarylmethanes Brilliant green, Green S (E142), and Patent Blue V (E131) by erythrocytes |
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2017 |
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International Journal for Parasitology: Drugs and Drug Resistance |
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International Journal for Parasitology: Drugs and Drug Resistance |
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7 |
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3 |
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314-320 |
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Antimalarial dyes; Brilliant green; Drug uptake; Food dyes; Transmission blocking; Triarylmethanes |
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The search for safe antimalarial compounds acting against asexual symptom-responsible stages and sexual transmission-responsible forms of Plasmodium species is one of the major challenges in malaria elimination programs. So far, among current drugs approved for human use, only primaquine has transmission-blocking activity. The discovery of small molecules targeting different Plasmodium falciparum life stages remains a priority in antimalarial drug research. In this context, several independent studies have recently reported antiplasmodial and transmission-blocking activities of commonly used stains, dyes and fluorescent probes against P. falciparum including chloroquine-resistant isolates. Herein we have studied the antimalarial activities of dyes with different scaffold and we report that the triarylmethane dye (TRAM) Brilliant green inhibits the growth of asexual stages (IC50 ≤ 2 μM) and has exflagellation-blocking activity (IC50 ≤ 800 nM) against P. falciparum reference strains (3D7, 7G8) and chloroquine-resistant clinical isolate (Q206). In a second step we have investigated the antiplasmodial activities of two polysulfonated triarylmethane food dyes. Green S (E142) is weakly active against P. falciparum asexual stage (IC50 ≃ 17 μM) whereas Patent Blue V (E131) is inactive in both antimalarial assays. By applying liquid chromatography techniques for the culture supernatant analysis after cell washings and lysis, we report the detection of Brilliant green in erythrocytes, the selective uptake of Green S (E142) by infected erythrocytes, whereas Patent Blue V (E131) could not be detected within non-infected and 3D7-infected erythrocytes. Overall, our results suggest that two polysulfonated food dyes might display different affinity with transporters or channels on infected RBC membrane. © 2017 The Authors |
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Research Unit of Genetics and Genomics of Insect Vectors Institut Pasteur, Paris, France |
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Export Date: 18 September 2017 |
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EcoFoG @ webmaster @ |
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765 |
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Basset, C.; Rodrigues, A.M.S.; Eparvier, V.; Silva, M.R.R.; Lopes, N.P.; Sabatier, D.; Fonty, E.; Espindola, L.S.; Stien, D. |
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Secondary metabolites from Spirotropis longifolia (DC) Baill and their antifungal activity against human pathogenic fungi |
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Journal Article |
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2012 |
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Phytochemistry |
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Phytochemistry |
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74 |
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166-172 |
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Antifungal; Cytotoxic; Leguminosae; Monodominant species; Prenylated pterocarpans; Spirotropis longifolia |
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A phytochemical study of the ethyl acetate extract of the roots and adventitious roots of Spirotropis longifolia, a monodominant tree species of the Guianan rainforest, has allowed the isolation of three compounds: 2-hydroxy-8,9-methylenedioxy-2′,2′-dimethylpyrano-[5′, 6′:4,3]-6a-prenyl-[6aS,11aS]-pterocarpan (spirotropin A), 2-hydroxy-8,9-methylenedioxy-2′,2′-dimethyl-3′, 4′-dihydropyrano-[5′,6′:4,3]-6a-prenyl-[6aS,11aS]-pterocarpan (spirotropin B), and 5,7-dihydroxy-6,8-diprenyl-2,2-dimethylpyrano[5,6: 3′,4′]-isoflavone (spirotropone). In addition, 10 known compounds, trans-oxyresveratrol, trans-resveratrol, piceatannol, daidzein, genistein, isoprunetin, lupeol, latifolol, gnetin D and gnetin E, were also isolated. These compounds were evaluated for their antifungal activity and their cytotoxicity, and their structures were established by 1D and 2D NMR, HRMS, CD and optical rotation measurements. © 2011 Elsevier Ltd. All rights reserved. |
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CNRS, Institut de Chimie des Substances Naturelles, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette cedex, France |
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00319422 (Issn) |
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Export Date: 23 February 2012; Source: Scopus; Coden: Pytca; doi: 10.1016/j.phytochem.2011.10.011; Language of Original Document: English; Correspondence Address: Espindola, L.S.; Laboratório de Farmacognosia, Universidade de Brasília, Brasília, DF, Brazil; email: darvenne@unb.br |
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EcoFoG @ webmaster @ |
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381 |
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Royer, M.; Rodrigues, A.M.S.; Herbette, G.; Beauchene, J.; Chevalier, M.; Herault, B.; Thibaut, B.; Stien, D. |
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Efficacy of Bagassa guianensis Aubl. extract against wood decay and human pathogenic fungi |
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Journal Article |
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2012 |
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International Biodeterioration and Biodegradation |
Abbreviated Journal |
Int. Biodeterior. Biodegrad. |
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70 |
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55-59 |
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Antifungal; Bagassa guianensis; Extractives; Natural durability; Polyphenols; Synergy |
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Extractives that provide natural resistance to Bagassa guianensis Aubl. heartwood were examined. Soil-bed tests showed that the B. guianensis heartwood resistance was significantly reduced after ethyl acetate extraction, whereas methanol and especially water extractions improved the resistance. The ethyl acetate extract was submitted to a bioguided fractionation, and fractions were tested against one wood-destroying fungal strain (Pycnoporus sanguineus) and two human pathogenic fungal strains (Candida glabrata (yeast) and Trichophyton rubrum (filamentous dermatophyte)). Fraction F7, which exhibited the strongest antifungal activity, was subsequently fractionated by high performance liquid chromatography (HPLC). Six previously described compounds were isolated. Although the two moracins, 6-O-methyl-moracin N (3) and moracin N (4) were the most active against fungal strains with MIC values between 4 and 16 μg ml -1, the isolated compounds showed less or equivalent antifungal activity than the initial fraction. Possible synergism between compounds 3 and 4 and other secondary metabolites have been hypothesized. Our study demonstrated that this extract as a whole might be used as a wood preservation or antimycotic product. © 2012 Elsevier Ltd. |
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CNRS, Institut de Chimie des Substances Naturelles, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France |
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09648305 (Issn) |
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Export Date: 2 May 2012; Source: Scopus; Coden: Ibbie; doi: 10.1016/j.ibiod.2011.10.016; Language of Original Document: English; Correspondence Address: Royer, M.; Centre de recherche sur le bois, Département des sciences du bois et de la forêt, Faculté de foresterie de géographie et de géomatique, Université Laval, 2425, rue de la Terrasse, Québec, QC, G1V 0A6, Canada; email: mariana.royer.1@ulaval.ca |
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398 |
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Houel, E.; Gonzalez, G.; Bessière, J.-M.; Odonne, G.; Eparvier, V.; Deharo, E.; Stien, D. |
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Therapeutic switching: From antidermatophytic essential oils to new leishmanicidal products |
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2015 |
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Memorias do Inst. Oswaldo Cruz |
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110 |
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1 |
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106-113 |
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Antifungal agents; Antiparasitic agents; Leishmania; Peritoneal macrophages – sesquiterpenes; Therapeutic switching |
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This study examined whether the antidermatophytic activity of essential oils (EOs) can be used as an indicator for the discovery of active natural products against Leishmania amazonensis. The aerial parts of seven plants were hydrodistilled. Using broth microdilution techniques, the obtained EOs were tested against three strains of dermatophytes (Trichophyton mentagrophytes, Microsporum gypseum and Microsporum canis). To compare the EOs antifungal and antiparasitic effects, the EOs activities against axenic amastigotes of L. amazonensis were concurrently evaluated. For the most promising EOs, their antileishmanial activities against parasites infecting peritoneal macrophages of BALB/c mice were measured. The most interesting antifungal candidates were the EOs from Cymbopogon citratus, Otacanthus azureus and Protium heptaphyllum, whereas O. azureus, Piper hispidum and P. heptaphyllum EOs exhibited the lowest 50% inhibitory concentration (IC50) values against axenic amastigotes, thus revealing a certain correspondence between both activities. The P. hispidum EO was identified as the most promising product in the results from the infected macrophages model (IC50: 4.7 μg/mL, safety index: 8). The most abundant compounds found in this EO were sesquiterpenes, notably curzerene and furanodiene. Eventually, the evaluation of the antidermatophytic activity of EOs appears to be an efficient method for identifying new potential drugs for the treatment of L. amazonensis. |
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Export Date: 17 March 2015 |
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587 |
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Houel, E.; Rodrigues, A.M.S.; Jahn-Oyac, A.; Bessière, J.-M.; Eparvier, V.; Deharo, E.; Stien, D. |
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In vitro antidermatophytic activity of Otacanthus azureus (Linden) Ronse essential oil alone and in combination with azoles |
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2014 |
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Journal of Applied Microbiology |
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J. Appl. Microbiol. |
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116 |
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2 |
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288-294 |
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Antifungal activity; Azoles; Dermatophytes; Essential oil; Otacanthus azureus; Synergy |
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Aims: We determined the chemical composition and investigated the antifungal activity of Otacanthus azureus (Linden) Ronse essential oil (EO) against a range of dermatophytes alone or in combination with azole antifungals. Methods and Results: Aerial parts of the plant were steam-distilled and the obtained oil was analysed by gas chromatography/mass spectrometry and 1H-NMR. It was shown to be largely composed of sesquiterpenes, with the main component being β-copaen-4-α-ol. Using broth microdilution techniques, this oil was found to have remarkable in vitro antifungal activities. Minimum inhibitory concentrations as low as 4 μg ml-1 were recorded. The analysis of the combined effect of the O. azureus EO with azoles using chequerboard assays revealed a synergism between the EO and ketoconazole, fluconazole or itraconazole against Trichophyton mentagrophytes. Notably, the O. azureus essential oil showed low cytotoxicity to VERO cells. Conclusions: The O. azureus essential oil alone or in combination with azoles is a promising antifungal agent in the treatment for human dermatomycoses caused by filamentous fungi. Significance and Impact of the Study: There is much interest in the study of essential oils for the discovery of new antimicrobial drugs. This study has highlighted the antidermatophytic activity of the O. azureus EO. © 2013 The Society for Applied Microbiology. |
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Institut de Recherche pour le Développement (IRD), UMR 152 Pharma-DEV, Toulouse, France |
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13645072 (Issn) |
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Export Date: 9 February 2014; Source: Scopus; Coden: Jamif; Language of Original Document: English; Correspondence Address: Houël, E.; CNRS – UMR Ecologie des Forêts de Guyane (EcoFoG), Institut Pasteur de la Guyane, 23 Avenue Pasteur, BP6010, 97306 Cayenne Cedex, French Guiana; email: emeline.houel@ecofog.gf |
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EcoFoG @ webmaster @ |
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526 |
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Khia, A.; Ghanmi, M.; Satrani, B.; Aafi, A.; Aberchane, M.; Quaboul, B.; Chaouch, A.; Amusant, N.; Charrouf, Z. |
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Effect of provenance on the chemical and microbiological quality of essential oils of Rosmarinus officinalis L. in Morocco |
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Journal Article |
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2014 |
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Phytotherapie |
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Phytotherapie |
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12 |
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6 |
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341-347 |
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Antibacterial; Antifungal activity; Chemical composition; Essential Oil; Provenance; Rosmarinus officinalis |
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This study is an assessment of the chemical quality and evaluation of antibacterial and antifungal activity of rosemary’s essential oils from three regions of Morocco (Rchida and Berkine/Eastern Morocco and Aknoul/North East of Morocco. The essential oils obtained by hydrodistillation of the leaves and young twigs of rosemary, were analyzed by GC / FID and GC/ MS. These essential oils are characterized by the presence of α and β-pinene, camphene, 1,8-cineole and camphor compounds. The quality of these essential oils met the AFNOR NF ISO 4730 rosemary Morocco kind (1,8-cineole). The evaluation of the antimicrobial activity of essential oils of Rosmarinus officinalis showed low efficacy against microorganisms tested which were all inhibited from 1/100 v/v except for Penicillium expansum whose growth was stopped at the concentration 1/250 v/v. |
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Département d’Environnement et Sociétés, UMR EcoFoG, CIRAD, BP 732Kourou cedex, French Guiana |
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Export Date: 31 December 2014 |
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574 |
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Gao, H.; Grüschow, S.; Barke, J.; Seipke, R.F.; Hill, L.M.; Orivel, J.; Yu, D.W.; Hutchings, M.; Goss, R.J.M. |
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Filipins: The first antifungal “weed killers” identified from bacteria isolated from the trap-ant |
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2014 |
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RSC Advances |
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RSC Adv. |
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4 |
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100 |
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57267-57270 |
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Anti-fungal |
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Allomerus ants ensure that they have sufficient nitrogen in their diet by trapping and consuming other insects. In order to construct their traps, like the more extensively studied leaf cutter ants, they employ fungal farming. Pest management within these fungal cultures has been speculated to be due to the ants' usage of actinomycetes capable of producing antifungal compounds, analogous to the leafcutter ant mutualism. Here we report the first identification of a series of antifungal compounds, the filipins, and their associated biosynthetic genes isolated from a bacterium associated with this system. |
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State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of ZoologyKunming, Yunnan, China |
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Royal Society of Chemistry |
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Export Date: 20 November 2014; Coden: Rscac; Correspondence Address: Goss, R.J.M.; School of Chemistry, University of St. AndrewsUnited Kingdom; Funding Details: 311848, EC, European Commission |
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Bodin, S.C.; Scheel-Ybert, R.; Beauchene, J.; Molino, J.-F.; Bremond, L. |
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CharKey: An electronic identification key for wood charcoals of French Guiana |
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2019 |
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IAWA Journal |
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Iawa J. |
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40 |
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1 |
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75-91 |
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anthracology; Charcoal anatomy; computeraided identification; Note: Supplementary material can be accessed in the online edition of this journal via brill.com/iawa.; tropical flora; Xper 2 |
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Tropical tree floras are highly diverse and many genera and species share similar anatomical patterns, making the identification of tropical wood charcoal very difficult. Appropriate tools to characterize charcoal anatomy are thus needed to facilitate and improve identification in such species-rich areas. This paper presents the first computer-aided identification key designed for charcoals from French Guiana, based on the wood anatomy of 507 species belonging to 274 genera and 71 families, which covers respectively 28%, 67% and 86% of the tree species, genera and families currently listed in this part of Amazonia. Species of the same genus are recorded together except those described under a synonym genus in Détienne et al. (1982) that were kept separately. As a result, the key contains 289 'items' and mostly aims to identify charcoals at the genus level. It records 26 anatomical features leading to 112 feature states, almost all of which are illustrated by SEM photographs of charcoal. The descriptions were mostly taken from Détienne et al.'s guidebook on tropical woods of French Guiana (1982) and follow the IAWA list of microscopic features for hardwood identification (Wheeler et al. 1989). Some adjustments were made to a few features and those that are unrelated to charcoal identification were excluded. The whole tool, named CharKey, contains the key itself and the associated database including photographs. It can be downloaded on Figshare at https://figshare.com/s/d7d40060b53d2ad60389 (doi: 10.6084/m9.figshare.6396005). CharKey is accessible using the free software Xper 2 , specifically conceived for taxonomic description and computer aided-identification. |
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Ecole Pratique des Hautes Etudes, PSL Research University, Paris, France |
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Brill Academic Publishers |
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EcoFoG @ webmaster @ |
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864 |
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Scotti, I.; Delph, L.F. |
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Selective trade-offs and sex-chromosome evolution in Silene latifolia |
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Journal Article |
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2006 |
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Evolution |
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Evolution |
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60 |
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9 |
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1793-1800 |
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antagonistic genes; linkage map; quantitative trait loci; sex-specific expression; Y chromosome |
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Alleles of sexually antagonistic genes (i.e., genes with alleles affecting fitness in opposite directions in the two sexes) can avoid expression in the sex to which they are detrimental via two processes: they are subsumed into the nonrecombining, sex-determining portion of the sex chromosomes or they evolve sex-limited expression. The former is considered more likely and leads to Y-chromosome degeneration. We mapped quantitative trait loci of major effect for sexually dimorphic traits of Silene latifolia to the recombining portions of the sex chromosomes and found them to exhibit sex-specific expression, with the Y chromosome in males controlling a relatively larger proportion of genetic variance than the X in females and the average autosome. Both reproductive and ecophysiological traits map to the recombining region of the sex chromosomes. We argue that genetic correlations among traits maintain recombination and polymorphism for these genes because of balancing selection in males, whereas sex-limited expression represses detrimental alleles in females. Our data suggest that the Y chromosome of S. latifolia plays a major role in the control of key metabolic activities beyond reproductive functions. |
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Indiana Univ, Dept Biol, Bloomington, IN 47405 USA, Email: ivan.scotti@kourou.cirad.fr |
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SOC STUDY EVOLUTION |
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0014-3820 |
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ISI:000241226800005 |
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174 |
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