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Author Chevolot, M.; Louisanna, E.; Azri, W.; Leblanc-Fournier, N.; Roeckel-Drevet, P.; Scotti-Saintagne, C.; Scotti, I. openurl 
  Title (down) Isolation of primers for candidate genes for mechano-sensing in five Neotropical tree species Type Journal Article
  Year 2011 Publication Tree Genetics & Genomes Abbreviated Journal Tree Genet. Genomes  
  Volume 7 Issue 3 Pages 655-661  
  Keywords Population genomics; Functional gene; Mechanical signals; Fabaceae  
  Abstract Mechanical signals have an impact on plant development. Tropical rainforest trees display large variability for life-history traits related to biomechanics and therefore are a unique study system to better understand biomechanical trait variability from an evolutionary perspective. From sequences and gene expression data available in model species, we developed specific primers for six candidate genes for mechano-sensing in five tropical species. Most of the gene sequences were polymorphic in most species.  
  Address [Chevolot, Malia; Louisanna, Eliane; Scotti-Saintagne, Caroline; Scotti, Ivan] INRA, Unite Mixte Rech Ecol Forets Guyane, Kourou 97310, French Guiana, Email: ivan.scotti@ecofog.gf  
  Corporate Author Thesis  
  Publisher Springer Heidelberg Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1614-2942 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000290571900018 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 315  
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Author Cottet, K.; Fromentin, Y.; Kritsanida, M.; Grougnet, R.; Odonne, G.; Duplais, C.; Michel, S.; Lallemand, M.-C. url  openurl
  Title (down) 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 Touchard, A.; Brust, A.; Cardoso, F.C.; Chin, Y.K.-Y.; Herzig, V.; Jin, A.-H.; Dejean, A.; Alewood, P.F.; King, G.F.; Orivel, J.; Escoubas, P. url  doi
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  Title (down) Isolation and characterization of a structurally unique β-hairpin venom peptide from the predatory ant Anochetus emarginatus Type Journal Article
  Year 2016 Publication Biochimica et Biophysica Acta – General Subjects Abbreviated Journal Biochimica et Biophysica Acta – General Subjects  
  Volume 1860 Issue 11 Pages 2553-2562  
  Keywords Anochetus; Ant venom; Disulfide-rich peptides; L-type calcium channels; Neurotoxin; Poneritoxins; U1-PONTX-Ae1a  
  Abstract Background Most ant venoms consist predominantly of small linear peptides, although some contain disulfide-linked peptides as minor components. However, in striking contrast to other ant species, some Anochetus venoms are composed primarily of disulfide-rich peptides. In this study, we investigated the venom of the ant Anochetus emarginatus with the aim of exploring these novel disulfide-rich peptides. Methods The venom peptidome was initially investigated using a combination of reversed-phase HPLC and mass spectrometry, then the amino acid sequences of the major peptides were determined using a combination of Edman degradation and de novo MS/MS sequencing. We focused on one of these peptides, U1-PONTX-Ae1a (Ae1a), because of its novel sequence, which we predicted would form a novel 3D fold. Ae1a was chemically synthesized using Fmoc chemistry and its 3D structure was elucidated using NMR spectroscopy. The peptide was then tested for insecticidal activity and its effect on a range of human ion channels. Results Seven peptides named poneritoxins (PONTXs) were isolated and sequenced. The three-dimensional structure of synthetic Ae1a revealed a novel, compact scaffold in which a C-terminal β-hairpin is connected to the N-terminal region via two disulfide bonds. Synthetic Ae1a reversibly paralyzed blowflies and inhibited human L-type voltage-gated calcium channels (CaV1). Conclusions Poneritoxins from Anochetus emarginatus venom are a novel class of toxins that are structurally unique among animal venoms. General significance This study demonstrates that Anochetus ant venoms are a rich source of novel ion channel modulating peptides, some of which might be useful leads for the development of biopesticides. © 2016  
  Address VenomeTech, 473 Route des Dolines, Valbonne, France  
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  Notes Export Date: 15 September 2016 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 694  
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Author Fouquet, A.; Dubut, V.; Hataway, R.; Scotti-Saintagne, C.; Scotti, I.; Noonan, B. doi  openurl
  Title (down) Isolation and characterisation of 19 microsatellite loci from the Amazonian frog Adenomera andreae (Amphibia: Anura: Leptodactylidae) Type Journal Article
  Year 2009 Publication Conservation Genetics Resources Abbreviated Journal Conserv. Genet. Res.  
  Volume 1 Issue 1 Pages 217-220  
  Keywords Biomedicine  
  Abstract Nineteen novel microsatellite loci were isolated from Adenomera andreae, a widespread Amazonian frog considered to be a species complex. Three multiplex kits were optimized. Genetic diversity was assessed in 66 individuals sampled in three populations along the West of the Approuague River catchment (French Guiana). We also tested the multiplex kits in four other Adenomera and nine Leptodactylus species with 43.4 and 17.5% success respectively.  
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  Publisher Springer Netherlands Place of Publication Editor  
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  Series Volume Series Issue Edition  
  ISSN 1877-7252 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 185  
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Author Levionnois, Sébastien ; Ziegler, Camille ; Heuret, Patrick ; Jansen, Steven ; Stahl, Clément ; Calvet, Emma ; Goret, Jean-Yves ; Bonal, Damien ; Coste, Sabrina doi  openurl
  Title (down) Is vulnerability segmentation at the leaf‑stem transition a drought resistance mechanism? A theoretical test with a trait‑based model for Neotropical canopy tree species Type Journal Article
  Year 2021 Publication Annals of Forest Science Abbreviated Journal  
  Volume 78 Issue 4 Pages 78-87  
  Keywords Neotropics, bark, canopy, capacitance, drought, drought tolerance, embolism, leaves, models, transpiration, trees, tropical rain forests, xylem  
  Abstract Leaf-stem vulnerability segmentation predicts lower xylem embolism resistance in leaves than stem. However, although it has been intensively investigated these past decades, the extent to which vulnerability segmentation promotes drought resistance is not well understood. Based on a trait-based model, this study theoretically supports that vulnerability segmentation enhances shoot desiccation time across 18 Neotropical tree species. CONTEXT: Leaf-stem vulnerability segmentation predicts lower xylem embolism resistance in leaves than stems thereby preserving expensive organs such as branches or the trunk. Although vulnerability segmentation has been intensively investigated these past decades to test its consistency across species, the extent to which vulnerability segmentation promotes drought resistance is not well understood. AIMS: We investigated the theoretical impact of the degree of vulnerability segmentation on shoot desiccation time estimated with a simple trait-based model. METHODS: We combined data from 18 tropical rainforest canopy tree species on embolism resistance of stem xylem (flow-centrifugation technique) and leaves (optical visualisation method). Measured water loss under minimum leaf and bark conductance, leaf and stem capacitance, and leaf-to-bark area ratio allowed us to calculate a theoretical shoot desiccation time (tcᵣᵢₜ). RESULTS: Large degrees of vulnerability segmentation strongly enhanced the theoretical shoot desiccation time, suggesting vulnerability segmentation to be an efficient drought resistance mechanism for half of the studied species. The difference between leaf and bark area, rather than the minimum leaf and bark conductance, determined the drastic reduction of total transpiration by segmentation during severe drought. CONCLUSION: Our study strongly suggests that vulnerability segmentation is an important drought resistance mechanism that should be better taken into account when investigating plant drought resistance and modelling vegetation. We discuss future directions for improving model assumptions with empirical measures, such as changes in total shoot transpiration after leaf xylem embolism.  
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  Call Number EcoFoG @ webmaster @ Serial 1034  
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Author Clair, B.; Déjardin, A.; Pilate, G.; Alméras, T. pdf  url
doi  openurl
  Title (down) Is the G-layer a tertiary cell wall? Type Journal Article
  Year 2018 Publication Frontiers in Plant Science Abbreviated Journal  
  Volume 9 Issue Pages 623  
  Keywords Flax; G-layer; Gelatinous layer; Maturation stress; Secondary cell wall; Tension wood; Tertiary cell wall  
  Abstract  
  Address LMGC, CNRS, Université de Montpellier, Montpellier, France  
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  Notes Export Date: 31 May 2018 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 805  
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Author Ferry, B.; Bontemps, J.-D.; Blanc, L.; Baraloto, C. url  openurl
  Title (down) Is climate a stronger driver of tree growth than disturbance? A comment on Toledo et al. (2011) Type Journal Article
  Year 2012 Publication Journal of Ecology Abbreviated Journal J. Ecol.  
  Volume 100 Issue 5 Pages 1065-1068  
  Keywords Basal area change; Bolivia; Climate; Disturbance; Logging; Plant-climate interactions; Tree growth; Tropical forest  
  Abstract 1.A recent article published by Toledo (2011b) investigates the effects of spatial variations in climate and soil, and of logging disturbance, on tree and forest growth in Bolivia. It concludes that climate is the strongest driver of tree and forest growth and that climate change may therefore have large consequences for forest productivity and carbon sequestration. However, serious methodological and conceptual discrepancies have been found that challenge these conclusions. 2.Because of an errant coding of 'time after logging' in the regression analysis, and because floristic changes induced by logging could not be incorporated into the analysis, the effect of logging on the average diameter growth is likely to have been strongly underestimated. 3.Basal area growth was improperly calculated as basal area change, and it displayed surprisingly high values, even among unlogged plots. We hypothesize that either these plots may be actually located in secondary forests recovering from past logging, or measurement biases may have hampered the data set. 4.Regardless of climate-growth relationships established across these plots, any inference concerning the potential effects of climate change on forest growth would require a specific quantitative assessment. 5.Synthesis. It is critical to re-assess the relative weight of climate and logging disturbance as driving factors of tree and forest growth, and to find an explanation for the very high basal area increment reported among the unlogged plots. We provide specific recommendations for further analyses of this and similar data sets. © 2012 British Ecological Society.  
  Address INRA, UMR Ecologie des Forêts de Guyane, 97379 Kourou, French Guiana  
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  ISSN 00220477 (Issn) ISBN Medium  
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  Notes Cited By (since 1996): 1; Export Date: 4 September 2012; Source: Scopus; Coden: Jecoa; doi: 10.1111/j.1365-2745.2011.01895.x; Language of Original Document: English; Correspondence Address: Ferry, B.; AgroParisTech, ENGREF-Nancy, UMR 1092, F-54000 Nancy, France; email: bruno.ferry@engref.agroparistech.fr Approved no  
  Call Number EcoFoG @ webmaster @ Serial 426  
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Author Revel, N.; Alvarez, N.; Gibernau, M.; Espíndola, A. url  openurl
  Title (down) Investigating the relationship between pollination strategies and the size-advantage model in zoophilous plants using the reproductive biology of Arum cylindraceum and other European Arum species as case studies Type Journal Article
  Year 2012 Publication Arthropod-Plant Interactions Abbreviated Journal Arthropod-Plant Interact.  
  Volume 6 Issue 1 Pages 35-44  
  Keywords Araceae; Flower evolution; Plant-insect interactions; Reproductive strategy; Sex allocation  
  Abstract The size-advantage model (SAM) explains the temporal variation of energetic investment on reproductive structures (i. e. male and female gametes and reproductive organs) in long-lived hermaphroditic plants and animals. It proposes that an increase in the resources available to an organism induces a higher relative investment on the most energetically costly sexual structures. In plants, pollination interactions are known to play an important role in the evolution of floral features. Because the SAM directly concerns flower characters, pollinators are expected to have a strong influence on the application of the model. This hypothesis, however, has never been tested. Here, we investigate whether the identity and diversity of pollinators can be used as a proxy to predict the application of the SAM in exclusive zoophilous plants. We present a new approach to unravel the dynamics of the model and test it on several widespread Arum (Araceae) species. By identifying the species composition, abundance and spatial variation of arthropods trapped in inflorescences, we show that some species (i. e. A. cylindraceum and A. italicum) display a generalist reproductive strategy, relying on the exploitation of a low number of dipterans, in contrast to the pattern seen in the specialist A. maculatum (pollinated specifically by two fly species only). Based on the model presented here, the application of the SAM is predicted for the first two and not expected in the latter species, those predictions being further confirmed by allometric measures. We here demonstrate that while an increase in the female zone occurs in larger inflorescences of generalist species, this does not happen in species demonstrating specific pollinators. This is the first time that this theory is both proposed and empirically tested in zoophilous plants. Its overall biological importance is discussed through its application in other non-Arum systems. © 2011 Springer Science+Business Media B.V.  
  Address CNRS-UMR 8172 Ecologie des Forêts de Guyane, BP 709, 97387 Kourou, France  
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  ISSN 18728855 (Issn) ISBN Medium  
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  Notes Export Date: 21 March 2012; Source: Scopus; doi: 10.1007/s11829-011-9164-1; Language of Original Document: English; Correspondence Address: Espíndola, A.; Department of Ecology and Evolution, University of Lausanne, Biophore Building, 1015 Lausanne, Switzerland; email: MariaAnahi.Espindola@unil.ch Approved no  
  Call Number EcoFoG @ webmaster @ Serial 384  
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Author Touchard, A.;Dejean, A.;Orivel, J. pdf  doi
openurl 
  Title (down) Intraspecific variations in the venom peptidome of the ant Odontomachus haematodus (Formicidae: Ponerinae) from French Guiana Type Journal Article
  Year 2015 Publication Journal of Hymenoptera Research Abbreviated Journal Journal of Hymenoptera Research  
  Volume 47 Issue Pages 87-101  
  Keywords  
  Abstract Ant venoms are complex cocktails of toxins employed to subdue prey and to protect the colony from predators and microbial pathogens. Although the extent of ant venom peptide diversity remains largely unexplored, previous studies have revealed the presence of numerous bioactive peptides in most stinging ant venoms. We investigated the venom peptidome of the ponerine ant Odontomachus haematodus using LC-MS analysis and then verified whether the division of labor in the colonies and their geographical location are correlated with differences in venom composition. Our results reveal that O. haematodus venom is comprised of 105 small linear peptides. The venom composition does not vary between the different castes (i.e., nurses, foragers and queens), but an intraspecific variation in peptide content was observed, particularly when the colonies are separated by large distances. Geographical variation appears to increase the venom peptide repertoire of this ant species, demonstrating its intraspecific venom plasticity.  
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  Call Number EcoFoG @ webmaster @ Serial 643  
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Author Bastias, C.C.; Fortunel, C.; Valladares, F.; Baraloto, C.; Benavides, R.; Cornwell, W.; Markesteijn, L.; De Oliveira, A.A.; Sansevero, J.B.B.; Vaz, M.C.; Kraft, N.J.B. pdf  url
doi  openurl
  Title (down) Intraspecific leaf trait variability along a boreal-to-tropical community diversity gradient Type Journal Article
  Year 2017 Publication PLoS ONE Abbreviated Journal PLoS ONE  
  Volume 12 Issue 2 Pages e0172495  
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  Abstract Disentangling the mechanisms that shape community assembly across diversity gradients is a central matter in ecology. While many studies have explored community assembly through species average trait values, there is a growing understanding that intraspecific trait variation (ITV) can also play a critical role in species coexistence. Classic biodiversity theory hypothesizes that higher diversity at species-rich sites can arise from narrower niches relative to species-poor sites, which would be reflected in reduced ITV as species richness increases. To explore how ITV in woody plant communities changes with species richness, we compiled leaf trait data (leaf size and specific leaf area) in a total of 521 woody plant species from 21 forest communities that differed dramatically in species richness, ranging from boreal to tropical rainforests. At each forest, we assessed ITV as an estimate of species niche breadth and we quantified the degree of trait overlap among co-occurring species as a measure of species functional similarity. We found ITV was relatively invariant across the species richness gradient. In addition, we found that species functional similarity increased with diversity. Contrary to the expectation from classic biodiversity theory, our results rather suggest that neutral processes or equalizing mechanisms can be acting as potential drivers shaping community assembly in hyperdiverse forests. © This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.  
  Address Universidade Federal Rural do Rio de Janeiro-UFRRJ, Departamento de Ciencias Ambientais-DCA, Instituto de Florestas, Seropédica, Rio de Janeiro, Brazil  
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  Notes Export Date: 13 March 2017 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 744  
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