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Author |
Lamarre, G.P.A.; Amoretti, D.S.; Baraloto, C.; Bénéluz, F.; Mesones, I.; Fine, P.V.A. |
Title |
Phylogenetic Overdispersion in Lepidoptera Communities of Amazonian White-sand Forests |
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Journal Article |
Year |
2016 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
Volume |
48 |
Issue |
1 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
101-109 |
Keywords |
varillales; Amazon basin; Bottom-up; Lepidoptera composition; Moth, Nymphalidae; Phylogenetic structure |
Abstract |
In the Amazon basin and the Guiana Shield, white-sand (WS) forests are recognized as a low-resource habitat often composed by a distinct flora with many edaphic endemic plants. Small patches of nutrient-poor white-sand forests can pose a series of challenges to plants and animals. For plants, these challenges have been shown to function as strong filters that in turn drive taxonomic, functional and phylogenetic plant composition. However, very little is known about animal communities in WS forest and the effect that low-resource availability may have on higher trophic levels. Here, we investigate the diversity of both taxonomic and phylogenetic diversity of three Lepidoptera families' (Nymphalidae, Saturniidae, and Sphingidae) assemblages between low-resource (White-Sand Forest) and two adjacent high-resource habitats, terra firme clay and seasonally flooded forests. We found no clear effect of habitat type on taxonomic composition although butterfly and moth species abundance differed among the three contrasted habitats. The WS forest Lepidoptera community is significantly more phylogenetically overdispersed than expected by chance. We suggest that these low-resource habitats filter the number of plant lineages which, in turn, creates a bottom-up control structuring Lepidoptera phylogenetic structure. We recommend long-term sampling on Lepidoptera community both at larval and adult stages that may complement this study and test hypotheses linking herbivore phylogenetic structure to plant resource availability and trophic cascade theory. © 2016 The Association for Tropical Biology and Conservation. |
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Department of Biological Sciences, International Center for Tropical Botany, Florida International University, Miami, FL, United States |
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Cited By :1; Export Date: 12 February 2016 |
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EcoFoG @ webmaster @ |
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661 |
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Ferrer, A.; Dixon, A.F.; Gibernau, M.; Hemptinne, J.L. |
Title |
Ovarian dynamics and specialisation in ladybirds |
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Journal Article |
Year |
2010 |
Publication |
Ecological Entomology |
Abbreviated Journal |
Ecol. Entomol. |
Volume |
35 |
Issue |
1 |
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100-103 |
Keywords |
Ladybird beetles; oocyte resorption; ovarian dynamics; specialisation |
Abstract |
2. This hypothesis was tested by comparing a generalist and a specialist ladybird species belonging to the same genus. 3. A resorption index was calculated for females of both species subjected to several starvation regimes. This index indicated that over a period of fasting of 3 days, the intensity of resorption was greater in the generalist than the specialist. When food was again supplied, oogenesis resumed and within 1 day was faster in the generalist than in the specialist. 4. As predicted, the resorption of oocytes and replenishment occurred faster in the generalist than in the specialist species. This is the first time, to our knowledge, that the speed and intensity of the ovarian dynamics of a predatory insect have been linked to its way of life. |
Address |
[Ferrer, Aurelie; Hemptinne, Jean-Louis] Univ Toulouse ENFAT, CNRS, UMR 5174, F-31326 Castanet Tolosan, France, Email: jean-louis.hemptinne@educagri.fr |
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WILEY-BLACKWELL PUBLISHING, INC |
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0307-6946 |
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ISI:000273454300013 |
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EcoFoG @ eric.marcon @ |
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86 |
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Campos Barros, Luisa Antonia ; Chaul, Julio Cezar Mario ; Orivel, Jérome ; Cardoso de Aguiar, Hilton Jeferson Alves |
Title |
Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex |
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Journal Article |
Year |
2021 |
Publication |
Zoologischer Anzeiger |
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294 |
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100-105 |
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Cytogenetic techniques provide powerful insights on species-rich taxa–such as ants–allowing better understanding of their biodiversity. Some hints on evolutionary paths can be observed through comparative populational cytogenetics among different ant groups. In this study, the karyotype of Strumigenys louisianae Roger from the Amazon rainforest is described and showed diploid chromosome number of 26 chromosomes. This configuration intriguingly contrasts with the already described karyotype for this species from the Atlantic rainforest with only 2n = 4 chromosomes. 18S rDNA site were detected on the pericentromeric region of the long arm of a metacentric pair and co-localizing with GC-rich chromatin. Recurrent synonymizations of S. louisianae may not reflect the species status of this taxon. The karyotypic differences and the observable morphological variation between the populations of both localities corroborates the idea of a species complex within S. louisianae. The morphology of S. louisianae from the Amazonian region is similar to that from the United States, the type locality. On the other hand, specimens from the Atlantic rainforest are more similar to the junior synonym Strumigenys unidentata Mayr. This study reinforces the need of taxonomical revision in S. louisianae by means of integrative taxonomy approaches. |
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Elsevier |
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EcoFoG @ webmaster @ |
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1028 |
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Ruiz-González, M.X.; Lauth, J.; Leroy, C.; Jauneau, A.; Gryta, H.; Jargeat, P.; Dejean, A.; Orivel, J. |
Title |
An efficient protocol for isolating melanised chaetothyrialean anamorphic fungi associated with plant-ants |
Type |
Journal Article |
Year |
2013 |
Publication |
Journal of Basic Microbiology |
Abbreviated Journal |
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53 |
Issue |
1 |
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98-100 |
Keywords |
Allomerus ants; Black fungi; Chaetothyriales; Fluorescent staining; Isolation method |
Abstract |
Because of their ecological characteristics, slow growth rates and the presence of contaminants, Chaetothyriales fungi associated with structures built by tropical plant-ants can be difficult to isolate with standard procedures. Here, we describe an easy-to-use protocol for obtaining pure cultures by using cotton as a first substrate. We have further found by means of fluorescent stains that nuclei concentrate either in young hyphae or in the tips of the hyphae. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
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Université de Toulouse, ECOLAB, Toulouse, France |
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Export Date: 6 February 2013; Source: Scopus |
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no |
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EcoFoG @ webmaster @ |
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461 |
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Fromin, N.; Saby, N.P.A.; Lensi, R.; Brunet, D.; Porte, B.; Domenach, A.-M.; Roggy, J.-C. |
Title |
Spatial variability of soil microbial functioning in a tropical rainforest of French Guiana using nested sampling |
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Journal Article |
Year |
2013 |
Publication |
Geoderma |
Abbreviated Journal |
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197-198 |
Issue |
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98-107 |
Keywords |
Denitrification; Respiration; Scale dependent process; Soil microbial processes; Soil organic matter; Tree influence potential |
Abstract |
Understanding the pattern in spatial distribution of soil microbial processes is critical to understand the environmental factors that regulate them as well as to scale up these processes to ecosystem. Soil samples from a 1. ha tropical rainforest plot (Paracou, French Guiana) were analyzed according a nested sampling approach using different separation distances ranging from 0.4 to 40. m. The variability of substrate induced respiration (SIR) and of denitrification enzyme activity (DEA) was characterized in relation to various soil properties (total C and N contents, NIRS related index of soil organic matter quality, SOMQ, and index of tree influence potential, IP). The variability of SIR and DEA was higher than that of environmental properties. The patterns of accumulated variance as a function of distance varied among the soil properties. The variability of SIR and DEA mainly occurred at small (1. m) scale (and at the 10-40. m-scales for SIR), probably reflecting the quality of litter input that results of the influence of local assemblage of different tree species, though changes in the soil N and C contents. Indeed, total soil C and N contents explained the microbial properties at every scale. Coefficients of codispersion showed that neither SOMQ nor IP did correlate with SIR and DEA, and confirmed that total C and N contents explained microbial properties in a scale dependent and complex manner. Such spatial dependency underlines the importance of soil heterogeneity in this tropical forest with implications for sampling strategies when studying the microbial processes and their response to disturbances. © 2012 Elsevier B.V. |
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UMR EcoFoG, BP 709, 97387 Kourou, GUF, France |
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Export Date: 13 February 2013; Source: Scopus |
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EcoFoG @ webmaster @ |
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466 |
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Author |
Vastra, M.; Salvin, P.; Roos, C. |
Title |
MIC of carbon steel in Amazonian environment: Electrochemical, biological and surface analyses |
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Journal Article |
Year |
2016 |
Publication |
International Biodeterioration and Biodegradation |
Abbreviated Journal |
International Biodeterioration and Biodegradation |
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112 |
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98-107 |
Keywords |
Biology; Electrochemistry; Mic; Short term; Surface analyses |
Abstract |
In this study, the corrosion of S355 carbon steel was monitored for 50 days in equatorial environment. The experiments were conducted under three complementary approaches in a natural environment: (i) bacterial diversity was assessed with Miseq sequencing, (ii) observations of the surface and identifications of deposit compounds were realised with scanning electron microscopy (SEM), Raman spectrometry and EDX analyses, (iii) electrochemical measurements were used to calculate corrosion rate and to identify the phenomena which control corrosion. The results showed that the bacterial population had changed over immersion time from a dominance of β-proteobacteria to α-proteobacteria. This evolution decreased charge transfer resistance at the metal/deposit from 41.6 to 20.8 Ω/cm2 in 50 days, caused an increase in the corrosion rate by a factor of 2, from 0.13 to 0.27 mm/year. Surface analyses showed a progressive appearance of MIC markers in the deposit such as iron sulphide and manganese oxides that were detected after 30 days of immersion in the natural environment. In conclusion, this study describes in detail, the first stage of MIC activity on carbon steel surface in an equatorial brackish water, under aerobic conditions. © 2016 Elsevier Ltd. |
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Laboratoire des Matériaux et Molécules en Milieu Agressif, Université des Antilles, UMR ECOFOG, Campus Universitaire, Schœlcher, Martinique |
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Export Date: 1 June 2016 |
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no |
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EcoFoG @ webmaster @ |
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681 |
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Nicolini, E.; Caraglio, Y.; Pelissier, R.; Leroy, C.; Roggy, J.C. |
Title |
Epicormic branches: a growth indicator for the tropical forest tree, Dicorynia guianensis Amshoff (Caesalpiniaceae) |
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Journal Article |
Year |
2003 |
Publication |
Annals of Botany |
Abbreviated Journal |
Ann. Bot. |
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92 |
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1 |
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97-105 |
Keywords |
Dicorynia guianensis; architecture; epicormic branch; primary growth; secondary growth; tropical forest; French Guiana; height : diameter ratio |
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Architectural analyses of temperate tree species using a chronological approach suggest that the expression of epicormic branches is closely related to low growth rates in the axes that make up the branching system. Therefore, sole consideration of epicormic criteria may be sufficient to identify trees with low secondary growth levels or with both low primary and secondary growth levels. In a tropical tree such as Dicorynia guianensis (basralocus), where chronological studies are difficult, this relationship could be very useful as an easily accessible indicator of growth potentials. A simple method of architectural tree description was used to characterize the global structure of more than 1650 basralocus trees and to evaluate their growth level. Measurements of simple growth characters [height, basal diameter, internode length of submittal part (top of the main axis of the tree)] and the observation of four structural binary descriptors on the main stem (presence of sequential branches and young epicormic branches, state of the submittal part, global orientation), indicated that epicormic branch formation is clearly related to a decrease in length of the successive growth units of the main stem. Analysis of height vs. diameter ratios among different tree subgroups, with and without epicormic branching, suggested that trees with epicormic branches generally have a low level of secondary growth compared with primary growth. (C) 2003 Annals of Botany Company. |
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Cirad, UMR AMAP, F-34398 Montpellier 05, France |
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OXFORD UNIV PRESS |
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0305-7364 |
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ISI:000183980200010 |
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EcoFoG @ eric.marcon @ |
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245 |
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Chevalier, M.; Robert, F.; Amusant, N.; Traisnel, M.; Roos, C.; Lebrini, M. |
Title |
Enhanced corrosion resistance of mild steel in 1 M hydrochloric acid solution by alkaloids extract from Aniba rosaeodora plant: Electrochemical, phytochemical and XPS studies |
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Journal Article |
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2014 |
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Electrochimica Acta |
Abbreviated Journal |
Electrochim Acta |
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131 |
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96-105 |
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Acidic media; Adsorption-XPS; Aniba rosaeodora extract; Anibine; C38 steel; Corrosion inhibitor |
Abstract |
The present report continues to focus on the broadening application of plant extracts for metallic corrosion control and reports on the inhibiting effect of the Aniba rosaeodora alkaloidic extract on the corrosion of C38 steel in 1 M hydrochloric acid. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were applied to study the metal corrosion behavior in the absence and presence of inhibitor. Studies on the phytochemical constituents were established to determine the active(s) molecule(s). XPS was also carried out to establish the mechanism of corrosion inhibition of the active molecule of C38 steel in acid solution. The inhibitor extract acted as an efficient corrosion inhibitor in 1 M HCl. The experimental data obtained from EIS method show a frequency distribution and therefore a modelling element with frequency dispersion behaviour, a constant phase element (CPEα, Q) has been used. Graphical methods are illustrated by synthetic data to determine the parameter of CPE (α, Q). Polarization studies showed that the Aniba rosaeodora alkaloidic extract was a mixed-type inhibitor and its inhibition efficiency increased with the inhibitor concentration. Studies on the phytochemical constituents of the total alkaloids extract shows that it contains the anibine as the major alkaloid. The results obtained from the electrochemical study have clearly showed that the inhibition efficiency of the total extract was due to the presence of anibine. The XPS studies showed the formation of inhibitor layer containing the Aniba rosaeodora alkaloidic extract and the anibine molecules. © 2014 Elsevier Ltd. All rights reserved. |
Address |
Unité Matériaux et Transformations CNRS UMR 8207, Université Lille 1, École Nationale Supérieure de Chimie de Lille, Avenue Dimitri Mendeleïev-Bât. C7a BP 90108, 59652 Villeneuve d'Ascq, France |
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Elsevier Ltd |
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00134686 (Issn) |
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Export Date: 10 June 2014; Coden: Elcaa; Correspondence Address: Lebrini, M.; Laboratoire Matériaux et Molécules en Milieux Amazonien, UAG-UMR ECOFOG Campus Troubiran, Route de Baduel, 97337 Cayenne, French Guiana; email: mounim.lebrini@guyane.univ-ag.fr |
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EcoFoG @ webmaster @ |
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545 |
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Scotti, I.; Burelli, A.; Cattonaro, F.; Chagne, D.; Fuller, J.; Hedley, P.E.; Jansson, G.; Lalanne, C.; Madur, D.; Neale, D.; Plomion, C.; Powell, W.; Troggio, M.; Morgante, M. |
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Analysis of the distribution of marker classes in a genetic linkage map: a case study in Norway spruce (Picea abies karst) |
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Journal Article |
Year |
2005 |
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Tree Genetics & Genomes |
Abbreviated Journal |
Tree Genet. Genomes |
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1 |
Issue |
3 |
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93-102 |
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Picea abies; conifers; linkage map; genome structure; molecular markers; autocorrelation |
Abstract |
In order to analyze the large-scale structure of the genome of Norway spruce (Picea abies Karst.), a pseudo-testcross genetic linkage map was built using markers of six different types, belonging to the low (amplified fragment length polymorphisms, simple sequence repeats) or high (sequence-specific amplified polymorphisms, inter-retrotransposon amplified polymorphisms) copy-number fraction of the genome, and including expressed region-derived markers (expressed sequence tag polymorphisms). Twenty seven and 23 linkage groups of at least four markers were obtained for the female and the male parent maps, respectively. A subset of these linkage groups coalesced into 13 bi-parental linkage groups through markers shared between the two maps. This map was used to investigate the frequency of each marker type over chromosomes and the distribution of marker types relative to each other, using autocorrelation techniques. Our results show that, while the composition of chromosomes is homogeneous, low- and high-copy-number markers tend to occupy separate regions of the linkage groups, and that expressed sequences are preferentially associated with microsatellites and separated from retrotranspo sons. These results indicate that the spatial structure of Norway spruce chromosomes is not homogeneous. |
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INRA, UMR ECOFOG, Kourou 97387, French Guiana, Email: ivan.scotti@kourou.cirad.fr |
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SPRINGER HEIDELBERG |
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1614-2942 |
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ISI:000244896200002 |
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EcoFoG @ eric.marcon @ |
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167 |
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Niamké, F.B.; Amusant, N.; Stien, D.; Chaix, G.; Lozano, Y.; Kadio, A.A.; Lemenager, N.; Goh, D.; Adima, A.A.; Kati-Coulibaly, S.; Jay-Allemand, C. |
Title |
4',5'-Dihydroxy-epiisocatalponol, a new naphthoquinone from Tectona grandis L. f. heartwood, and fungicidal activity |
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Journal Article |
Year |
2012 |
Publication |
International Biodeterioration and Biodegradation |
Abbreviated Journal |
Int. Biodeterior. Biodegrad. |
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74 |
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93-98 |
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4',5'-Dihydroxy-epiisocatalponol; Decay resistance; Fungicidal; Heartwood; Naphthoquinone; Tectona grandis |
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A new naphthoquinone derivative was isolated from the heartwood of the teak stem. The chemical structure of this new compound, 4',5'-dihydroxy-epiisocatalponol, was determined using 1-D and 2-D nuclear magnetic resonance experiments, vibrational circular dichroism, HRMS, and optical rotation. We showed that this new naphthoquinone derivative plays a key role in the variability of decay resistance in teak wood. A high negative correlation was found between its concentration and the mass losses of the wood samples after exposure to the brown rot Antrodia sp., the fungus that is the most virulent against teak (R = -0.9; ρ < 0.0001). In-vitro bioassays allowed us to demonstrate that 4',5'-dihydroxy-epiisocatalponol acted as a fungicide against Trametes versicolor (white rot) at 58 mg ml -1 (0.22 mM). Overall, our results demonstrated that the concentration of 4',5'-dihydroxy-epiisocatalponol could be used as a new tool to evaluate teak wood durability. © 2012 Elsevier Ltd. |
Address |
Laboratoire de Biochimie et de Physiologie Végétales, UMR 47 DIADE – Equipe Rhizogenèse, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France |
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09648305 (Issn) |
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Export Date: 27 September 2012; Source: Scopus; Coden: Ibbie; doi: 10.1016/j.ibiod.2012.03.010; Language of Original Document: English; Correspondence Address: Amusant, N.; CIRAD, Department Environments and societies, UMR Ecology forests of French Guiana, BP 732, 97310 Kourou cedex, French Guiana; email: nadine.amusant@cirad.fr |
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EcoFoG @ webmaster @ |
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435 |
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