| Records |
| Author |
Rodrigues, A.M.S.; Theodoro, P.N.E.T.; Eparvier, V.; Basset, C.; Silva, M.R.R.; Beauchene, J.; Espindola, L.S.; Stien, D. |
| Title |
Search for Antifungal Compounds from the Wood of Durable Tropical Trees |
Type |
Journal Article |
| Year |
2010 |
Publication |
Journal of Natural Products |
Abbreviated Journal |
J. Nat. Prod. |
| Volume |
73 |
Issue |
10 |
Pages  |
1706-1707 |
| Keywords |
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| Abstract |
Research on antifungal compounds from the durable wood from French Guiana Amazonian forest trees highlights the correlation between the activity of their extracts against wood-rotting fungi and human pathogens. The fractionation of an ethyl acetate extract of Sextonia rubra wood led to the isolation of rubrenolide (1) and rubrynolide (2). The potential of compounds 1 and 2 is described through the evaluation of their activity against 16 pathogenic fungi and their cytotoxicity toward NIH-3T3 mammalian fibroblast cells. |
| Address |
[Rodrigues, Alice M. S.; Eparvier, Veronique; Basset, Charlie; Espindola, Laila S.; Stien, Didier] Univ Antilles Guyane, CNRS, UMR ECOFOG, F-97300 Cayenne, France, Email: darvenne@unb.br |
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| Publisher |
AMER CHEMICAL SOC |
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Edition |
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| ISSN |
0163-3864 |
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Conference |
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| Notes |
ISI:000283288900015 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
25 |
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| Author |
Lebrini, M.; Robert, F.; Roos, C. |
| Title |
Inhibition Effect of Alkaloids Extract from Annona Squamosa Plant on the Corrosion of C38 Steel in Normal Hydrochloric Acid Medium |
Type |
Journal Article |
| Year |
2010 |
Publication |
International Journal of Electrochemical Science |
Abbreviated Journal |
Int. J. Electrochem. Sci. |
| Volume |
5 |
Issue |
11 |
Pages |
1698-1712 |
| Keywords |
Plant extract; corrosion inhibitors; C38 steel; acidic media; adsorption |
| Abstract |
In this work, an alkaloids extract from Annona squamosa plant have been studied as possible corrosion inhibitor for C38 steel in molar hydrochloric acid (1 M HCl). Potentiodynamic polarization and AC impedance methods have been used. The corrosion inhibition efficiency increases on increasing plant extract concentration. Polarisation studies showed that Annona squamosa extract was mixed-type inhibitor in 1 M HCl. The inhibition efficiency of Annona squamosa extract was temperature-dependent and its addition led to an increase of the activation corrosion energy revealing a physical adsorption between the extract and the metal surface. The adsorption of the Annona squamosa extract followed Langmuir's adsorption isotherm. The inhibitive effect of Annona squamosa is ascribed to the presence of organic compounds in the extract. The examined extract is considered as non-cytotoxic substance. |
| Address |
[Lebrini, M.] CNRS 8172 UMR ECOFOG, Lab Mat & Mol Milieu Amazonien, Cayenne 97337, French Guiana, Email: florent.robert@guyane.univ-ag.fr |
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| Publisher |
ELECTROCHEMICAL SCIENCE GROUP |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1452-3981 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000283999000015 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
20 |
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| Author |
Perrot, T.; Guillaume, S.; Nadine, A.; Jacques, B.; Philippe, G.; Stéphane, D.; Rodnay, S.; Mélanie, M.-R.; Eric, G. |
| Title |
A reverse chemical ecology approach to explore wood natural durability |
Type |
Journal Article |
| Year |
2020 |
Publication |
Microbial Biotechnology |
Abbreviated Journal |
Microb. Biotechnol. |
| Volume |
13 |
Issue |
5 |
Pages |
1673-1677 |
| Keywords |
glutathione transferase; Article; biodegradation; data base; detoxification; ecology; enzyme activity; enzyme metabolism; forest; molecular dynamics; physical parameters; species identification; thermal analysis; Trametes versicolor; wood; wood durability |
| Abstract |
The natural durability of wood species, defined as their inherent resistance to wood-destroying agents, is a complex phenomenon depending on many biotic and abiotic factors. Besides the presence of recalcitrant polymers, the presence of compounds with antimicrobial properties is known to be important to explain wood durability. Based on the advancement in our understanding of fungal detoxification systems, a reverse chemical ecology approach was proposed to explore wood natural durability using fungal glutathione transferases. A set of six glutathione transferases from the white-rot Trametes versicolor were used as targets to test wood extracts from seventeen French Guiana neotropical species. Fluorescent thermal shift assays quantified interactions between fungal glutathione transferases and these extracts. From these data, a model combining this approach and wood density significantly predicts the wood natural durability of the species tested previously using long-term soil bed tests. Overall, our findings confirm that detoxification systems could be used to explore the chemical environment encountered by wood-decaying fungi and also wood natural durability. © 2020 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd and Society for Applied Microbiology. |
| Address |
Université de Lorraine, INRAE, LERMAB, Nancy, France |
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| Publisher |
John Wiley and Sons Ltd |
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Series Issue |
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Edition |
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| ISSN |
17517907 (Issn) |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
955 |
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| Author |
Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Bertocchi, E.; Plomion, C.; Kremer, A. |
| Title |
Detection of quantitative trait loci controlling bud burst and height growth in Quercus robur L |
Type |
Journal Article |
| Year |
2004 |
Publication |
Theoretical and Applied Genetics |
Abbreviated Journal |
Theor. Appl. Genet. |
| Volume |
109 |
Issue |
8 |
Pages |
1648-1659 |
| Keywords |
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| Abstract |
Genetic variation of bud burst and early growth components was estimated in a full-sib family of Quercus robur L. comprising 278 offspring. The full sibs were vegetatively propagated, and phenotypic assessments were made in three field tests. This two-generation pedigree was also used to construct a genetic linkage map (12 linkage groups, 128 markers) and locate quantitative trait loci (QTLs) controlling bud burst and growth components. In each field test, the date of bud burst extended over a period of 20 days from the earliest to the latest clone. Bud burst exhibited higher heritability (0.15-0.51) than growth components (0.04-0.23) and also higher correlations across field tests. Over the three tests there were 32 independent detected QTLs (Pless than or equal to5% at the chromosome level) controlling bud burst, which likely represent at least 12 unique genes or chromosomal regions controlling this trait. QTLs explained from 3% to 11% of the variance of the clonal means. The number of QTLs controlling height growth components was lower and varied between two and four. However the contribution of each QTL to the variance of the clonal mean was higher (from 4% to 19%). These results indicate that the genetic architecture of two important fitness-related traits are quite different. On the one hand, bud burst is controlled by several QTLs with rather low to moderate effects, but contributing to a high genetic (additive) variance. On the other hand, height growth depends on fewer QTLs with moderate to strong effects, resulting in lower heritabilities of the trait. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: antoine.kremer@pierroton.inra.fr |
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| Publisher |
SPRINGER |
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Series Issue |
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Edition |
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| ISSN |
0040-5752 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000225054800012 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
260 |
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| Author |
Bossu, J.; Lehnebach, R.; Corn, S.; Regazzi, A.; Beauchene, J.; Clair, B. |
| Title |
Interlocked grain and density patterns in Bagassa guianensis: changes with ontogeny and mechanical consequences for trees |
Type |
Journal Article |
| Year |
2018 |
Publication |
Trees |
Abbreviated Journal |
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| Volume |
32 |
Issue |
6 |
Pages |
1643-1655 |
| Keywords |
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| Abstract |
Interlocked grain and basic density increase from pith to bark in Bagassa guianensis and greatly improve trunk torsional stiffness and wood tenacity in the radial plane. |
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Series Issue |
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Edition |
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| ISSN |
1432-2285 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
EcoFoG @ webmaster @ Bossu2018 |
Serial |
852 |
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| Author |
Scotti-Saintagne, C.; Mariette, S.; Porth, I.; Goicoechea, P.G.; Barreneche, T.; Bodenes, K.; Burg, K.; Kremer, A. |
| Title |
Genome scanning for interspecific differentiation between two closely related oak species [Quercus robur L. and Q petraea (Matt.) Liebl.] |
Type |
Journal Article |
| Year |
2004 |
Publication |
Genetics |
Abbreviated Journal |
Genetics |
| Volume |
168 |
Issue |
3 |
Pages |
1615-1626 |
| Keywords |
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| Abstract |
Interspecific differentiation values (G(ST)) between two closely related oak species (Quercus petraea and Q. robur) were compiled across different studies with the aim to explore the distribution of differentiation at the genome level. The study was based on a total set of 389 markers (isozymes, AFLPs, SCARs, microsatellites, and SNPs) for which allelic frequencies were estimated in pairs of populations sampled throughout the sympatric distribution of the two species. The overall distribution of GST values followed an L-shaped curve with most markers exhibiting low species differentiation (G(ST) < 0.01) and only a few loci reaching >10% levels. Twelve percent of the loci exhibited significant G(ST) deviations to neutral expectations, suggesting that selection contributed to species divergence. Coding regions expressed higher differentiation than noncoding regions. Among the 389 markers, 158 could be mapped on the 12 linkage groups of the existing Q. robur genetic map. Outlier loci with large G, values were distributed over 9 linkage groups. One cluster of three outlier loci was found within 0.51 cM; but significant autocorrelation of GST was observed at distances <2 cM. The size and distribution of genomic regions involved in species divergence are discussed in reference to hitchhiking effects and disruptive selection. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: kremer@pierronton.inra.fr |
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Thesis |
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| Publisher |
GENETICS |
Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0016-6731 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000225767400041 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
258 |
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| Author |
Cottet, K.; Fromentin, Y.; Kritsanida, M.; Grougnet, R.; Odonne, G.; Duplais, C.; Michel, S.; Lallemand, M.-C. |
| Title |
Isolation of Guttiferones from Renewable Parts of Symphonia globulifera by Centrifugal Partition Chromatography |
Type |
Journal Article |
| Year |
2015 |
Publication |
Planta Medica |
Abbreviated Journal |
Planta Medica |
| Volume |
81 |
Issue |
17 |
Pages |
1604-1608 |
| Keywords |
centrifugal partition chromatography; Clusiaceae; countercurrent chromatography guttiferones; PPAPs; Symphonia globulifera |
| Abstract |
The aim of this study was to investigate the species Symphonia globulifera, a source of polycyclic polyprenylated acyl phloroglucinols such as guttiferone A, which is known to exhibit a variety of biological activities including noticeable antileishmanial properties. Our goal was the identification and the quantification of guttiferone A in different renewable parts of S. globulifera and its preparative isolation. To the best of our knowledge, there is no data concerning its mechanism of action. Consequently, it is particularly interesting to isolate it in gram quantities in order to establish structure activity relationship studies. After performing high-performance liquid chromatography profiles detecting the presence of guttiferone A and proceeding to its quantification, a centrifugal partition chromatography methodology using a two-phase solvent system of cyclohexane/ethyl acetate/methanol/water (20 : 1 : 20 : 1, v/v/v/v) was applied to each extract. In conclusion, a centrifugal partition chromatography system has been developed to ensure a fast, reliable, and scalable way to isolate, with a high level of purity, guttiferone A from five renewable parts of S. globulifera. Moreover, this methodology can be extended to the isolation of other polycyclic polyprenylated acyl phloroglucinols such as guttiferones B, C, and D. © Georg Thieme Verlag KG Stuttgart. |
| Address |
Laboratoire des Substances Naturelles Amazoniennes, Institut Pasteur de la Guyane, UMR EcoFoG (Ecologie des forêts de Guyane), Cayenne, France |
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| Notes |
Export Date: 7 January 2016 |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
646 |
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| Author |
Jaouen, G.; Almeras, T.; Coutand, C.; Fournier, M. |
| Title |
How to determine sapling buckling risk with only a few measurements |
Type |
Journal Article |
| Year |
2007 |
Publication |
American Journal of Botany |
Abbreviated Journal |
Am. J. Bot. |
| Volume |
94 |
Issue |
10 |
Pages |
1583-1593 |
| Keywords |
biomechanics; critical buckling height; French Guiana; risk factor; sapling; stem form; tropical rain forest; trunk volume |
| Abstract |
Tree buckling risk (actual height/critical buckling height) is an important biomechanical trait of plant growth strategies, and one that contributes to species coexistence. To estimate the diversity of this trait among wide samples, a method that minimizes damage to the plants is necessary. On the basis of the rarely used, complete version of Greenhill's model (1881, Proceedings of the Cambridge Philosophical Society 4(2): 65-73), we precisely measured all the necessary parameters on a sample of 236 saplings of 16 species. Then, using sensitivity (variance) analysis, regressions between successive models for risk factors and species ranks and the use of these models on samples of self- and nonself-supporting saplings, we tested different degrees of simplification up to the most simple and widely used formula that assumes that the tree is a cylindrical homogeneous pole. The size factor had the greatest effect on buckling risk, followed by the form factor and the modulus of elasticity of the wood. Therefore, estimates of buckling risk must consider not only the wood properties but especially the form factor. Finally, we proposed a simple but accurate method of assessing tree buckling risk that is applicable to a wide range of samples and that requires mostly nondestructive measurements. |
| Address |
INRA, UMR Ecol Forets Guyane, Kourou 97379, French Guiana, Email: jaouen-g@kourou.cirad.fr |
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| Publisher |
BOTANICAL SOC AMER INC |
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Summary Language |
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Series Issue |
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Edition |
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| ISSN |
0002-9122 |
ISBN |
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Conference |
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| Notes |
ISI:000251466600001 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
148 |
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| Author |
Laybros, A.; Aubry-Kientz, M.; Féret, J.-B.; Bedeau, C.; Brunaux, O.; Derroire, G.; Vincent, G. |
| Title |
Quantitative airborne inventories in dense tropical forest using imaging spectroscopy |
Type |
Journal Article |
| Year |
2020 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sens. |
| Volume |
12 |
Issue |
10 |
Pages |
1577 |
| Keywords |
Hyperspectral; LiDAR; Species diversity; Tropical forest; Cost effectiveness; Discriminant analysis; Infrared devices; Infrared radiation; Logistic regression; Remote sensing; Tropics; Classification accuracy; Classification performance; Linear discriminant analysis; Operational applications; Regularized discriminant analysis; Remote sensing technology; Short wave infrared bands; Visible and near infrared; Forestry |
| Abstract |
Tropical forests have exceptional floristic diversity, but their characterization remains incomplete, in part due to the resource intensity of in-situ assessments. Remote sensing technologies can provide valuable, cost-effective, large-scale insights. This study investigates the combined use of airborne LiDAR and imaging spectroscopy to map tree species at landscape scale in French Guiana. Binary classifiers were developed for each of 20 species using linear discriminant analysis (LDA), regularized discriminant analysis (RDA) and logistic regression (LR). Complementing visible and near infrared (VNIR) spectral bands with short wave infrared (SWIR) bands improved the mean average classification accuracy of the target species from 56.1% to 79.6%. Increasing the number of non-focal species decreased the success rate of target species identification. Classification performance was not significantly affected by impurity rates (confusion between assigned classes) in the non-focal class (up to 5% of bias), provided that an adequate criterion was used for adjusting threshold probability assignment. A limited number of crowns (30 crowns) in each species class was sufficient to retrieve correct labels effectively. Overall canopy area of target species was strongly correlated to their basal area over 118 ha at 1.5 ha resolution, indicating that operational application of the method is a realistic prospect (R2 = 0.75 for six major commercial tree species). © 2020 by the authors. |
| Address |
Cirad, UMR EcoFoG (AgroParistech, CNRS, INRAE, Université des Antilles, Université de la Guyane), Kourou, French Guiana, 97379, France |
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| Publisher |
Mdpi Ag |
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Summary Language |
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Series Issue |
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Edition |
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| ISSN |
20724292 (Issn) |
ISBN |
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Approved |
no |
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EcoFoG @ webmaster @ |
Serial |
969 |
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| Author |
Denis, T.; Richard-Hansen, C.; Brunaux, O.; Etienne, M.-P.; Guitet, S.; Herault, B. |
| Title |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
Type |
Journal Article |
| Year |
2017 |
Publication |
Ecological Applications |
Abbreviated Journal |
Ecol Appl |
| Volume |
27 |
Issue |
5 |
Pages |
1564-1577 |
| Keywords |
abundance; camouflage; distance sampling; encounter rate; French Guiana; hunting vulnerability; line transect; Neotropical terra firme rainforests; relative abundance |
| Abstract |
Line transect surveys are widely used in Neotropical rainforests to estimate the population abundance of medium- and large-sized vertebrates. The use of indices such as encounter rate has been criticized because the probability of animal detection may fluctuate due to the heterogeneity of environmental conditions among sites. In addition, the morphological and behavioral characteristics (biological traits) of species affect their detectability. In this study, we compared the extent to which environmental conditions and species’ biological traits bias abundance estimates in terra firme rainforests in French Guiana. The selected environmental conditions included both physical conditions and forest structure covariates, while the selected biological traits included the morphological and behavioral characteristics of species. We used the distance sampling method to model the detection probability as an explicit function of environmental conditions and biological traits and implemented a model selection process to determine the relative importance of each group of covariates. Biological traits contributed to the variability of animal detectability more than environmental conditions, which had only a marginal effect. Detectability was best for large animals with uniform or disruptive markings that live in groups in the canopy top. Detectability was worst for small, solitary, terrestrial animals with mottled markings. In the terra firme rainforests that represent ~80% of the Amazonia and Guianas regions, our findings support the use of relative indices such as the encounter rate to compare population abundance between sites in species-specific studies. Even though terra firme rainforests may appear similar between regions of Amazonia and the Guianas, comparability must be ensured, especially in forests disturbed by human activity. The detection probability can be used as an indicator of species’ vulnerability to hunting and, thus, to the risk of local extinction. Only a few biological trait covariates are required to correctly estimate the detectability of the majority of medium- and large-sized vertebrates. Thus, a biological trait model could be useful in predicting the detection probabilities of rare, uncommon, or localized species for which few data are available to fit the detection function. |
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Series Issue |
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Edition |
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1939-5582 |
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no |
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EcoFoG @ webmaster @ |
Serial |
764 |
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