| Records |
| Author |
Bereau, M.; Bonal, D.; Louisanna, E.; Garbaye, J. |
Title  |
Do mycorrhizas improve tropical tree seedling performance under water stress and low light conditions? A case study with Dicorynia guianensis (Caesalpiniaceae) |
Type |
Journal Article |
| Year |
2005 |
Publication |
Journal of Tropical Ecology |
Abbreviated Journal |
J. Trop. Ecol. |
| Volume |
21 |
Issue |
|
Pages |
375-381 |
| Keywords |
French Guiana; leaf gas exchange; mycorrhizal symbiosis; tropical forest; water limitation |
| Abstract |
We tested the response of seedlings of Diconyina guianensis, a major timber tree species of French Guiana, to mycorrhizal symbiosis and water limitation in a semi-con trolled experiment under natural light conditions. Under well-watered conditions, mycorrhizal colonization resulted in an increase of net photosynthesis, growth and phosphorus uptake. When submitted to water stress, no growth reduction of mycorrhizal seedlings was observed. Mycorrhizal seedlings were more sensitive to drought than non-mycorrhizal ones in terms of carbon assimilation, but not with regard to stomatal closure. In contrast to previous studies on temperate tree seedlings, this result precludes a mycorrhizal effect on the hydraulic properties of this species. Furthermore, our results suggest that below a specific threshold of soil moisture, carbon assimilation of D. guianensis seedlings was decreased by the mycorrhizal symbiosis. This is probably related to the competition between the plant and its host fungus for carbon allocation under low light intensity, even though it did not seem to have a significant effect on mortality in our experiment. |
| Address |
UMR Ecofog, Kourou 97387, French Guiana, Email: bercau.m@kourou.cirad.fr |
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| Publisher |
CAMBRIDGE UNIV PRESS |
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| ISSN |
0266-4674 |
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| Notes |
ISI:000231009300003 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
232 |
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| Author |
Ruiz-González, M.X.; Leroy, C.; Dejean, A.; Gryta, H.; Jargeat, P.; Carrión, A.D.A.; Orivel, J. |
| Title |
Do host plant and associated ant species affect microbial communities in myrmecophytes? |
Type |
Journal Article |
| Year |
2019 |
Publication |
Insects |
Abbreviated Journal |
Insects |
| Volume |
10 |
Issue |
11 |
Pages |
391 |
| Keywords |
Allomerus decemarticulatus; Allomerus octoarticulatus; Azteca sp; Cf; Cordia nodosa; Depilis; Domatia; Hirtella physophora; Microbial diversity |
| Abstract |
Ant-associated microorganisms can play crucial and often overlooked roles, and given the diversity of interactions that ants have developed, the study of the associated microbiomes is of interest. We focused here on specialist plant-ant species of the genus Allomerus that grow a fungus to build galleries on their host-plant stems. Allomerus-inhabited domatia, thus, might be a rich arena for microbes associated with the ants, the plant, and the fungus. We investigated the microbial communities present in domatia colonised by four arboreal ants: Allomerus decemarticulatus, A. octoarticulatus, A. octoarticulatus var. demerarae, and the non-fungus growing plant-ant Azteca sp. cf. depilis, inhabiting Hirtella physophora or Cordia nodosa in French Guiana. We hypothesized that the microbial community will differ among these species. We isolated microorganisms from five colonies of each species, sequenced the 16S rRNA or Internal TranscribedSpacer (ITS) regions, and described both the alpha and beta diversities. We identified 69 microbial taxa, which belong to five bacterial and two fungal phyla. The most diverse phyla were Proteobacteria and Actinobacteria. The microbial community of Azteca cf. depilis and Allomerus spp. differed in composition and richness. Geographical distance affected microbial communities and richness but plant species did not. Actinobacteria were only associated with Allomerus spp. |
| Address |
Biodiversity Genomics Team, Plant Ecophysiology & Evolution Group, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Daxuedonglu 100, Nanning, Guangxi 530005, China |
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Thesis |
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| Publisher |
Mdpi Ag |
Place of Publication |
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Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
20754450 (Issn) |
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Export Date: 18 November 2019; Correspondence Address: Ruiz-González, M.X.; Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Ecuador; email: marioxruizgonzalez@gmail.com |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
896 |
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| Author |
Chartier, M.; Pélozuelo, L.; Gibernau, M. |
| Title |
Do floral odor profiles geographically vary with the degree of specificity for pollinators? Investigation in two sapromyophilous Arum species (Araceae) |
Type |
Journal Article |
| Year |
2011 |
Publication |
Annales de la Societe Entomologique de France |
Abbreviated Journal |
Ann. Soc. Entomol. Fr. |
| Volume |
47 |
Issue |
1-2 |
Pages |
71-77 |
| Keywords |
Arum italicum; Arum maculatum; Floral scent; Psychodidae; Specificity |
| Abstract |
We compared floral odour profiles among populations of two Arum species which show different degrees of specificity for their fly pollinators. Insects were collected from inflorescences in four populations of Arum italicum and two populations of Arum maculatum. In six Arum populations, we compared inflorescences odour profiles collected by Solid Phase Micro Extraction (SPME) and analysed by gas chromatography. We confirmed that from a pollination point of view, A. italicum is an opportunist species, as it is mainly pollinated by insects of the families Psychodidae, Chironomidae and Sciaridae, whereas A. maculatum is a specialist species, as it is 90% pollinated by Psychodidae. In all populations, Arum italicum was less attractive to pollinators than Arum maculatum. Floral odour profiles of A. italicum were not geographically structured among populations, suggesting a high gene flow or adaptation to a fluctuant guild of pollinators. On the contrary, odour profiles of A. maculatum varied between the two populations studied suggesting a lower gene flow or adaptation to different local pollinator preferences. |
| Address |
CNRS – Ecofog (UMR 8172), BP709, F-97387 Kourou, France |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
00379271 (Issn) |
ISBN |
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| Notes |
Export Date: 26 October 2011; Source: Scopus; Language of Original Document: English; Correspondence Address: Chartier, M.; Université Paul Sabatier, Laboratoire Evolution and Diversité Biologique (UMR 5174), Bât. 4R3-B2, F-31062 Toulouse cedex 9, France; email: chartier.marion@gmail.com |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
366 |
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| Author |
Talaga, S.; Leroy, C.; Guidez, A.; Dusfour, I.; Girod, R.; Dejean, A.; Murienne, J. |
| Title |
DNA reference libraries of French Guianese mosquitoes for barcoding and metabarcoding |
Type |
Journal Article |
| Year |
2017 |
Publication |
PLoS ONE |
Abbreviated Journal |
PLoS ONE |
| Volume |
12 |
Issue |
6 |
Pages |
e0176993 |
| Keywords |
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| Abstract |
The mosquito family (Diptera: Culicidae) constitutes the most medically important group of arthropods because certain species are vectors of human pathogens. In some parts of the world, the diversity is so high that the accurate delimitation and/or identification of species is challenging. A DNA-based identification system for all animals has been proposed, the socalled DNA barcoding approach. In this study, our objectives were (i) to establish DNA barcode libraries for the mosquitoes of French Guiana based on the COI and the 16S markers, (ii) to compare distance-based and tree-based methods of species delimitation to traditional taxonomy, and (iii) to evaluate the accuracy of each marker in identifying specimens. A total of 266 specimens belonging to 75 morphologically identified species or morphospecies were analyzed allowing us to delimit 86 DNA clusters with only 21 of them already present in the BOLD database. We thus provide a substantial contribution to the global mosquito barcoding initiative. Our results confirm that DNA barcodes can be successfully used to delimit and identify mosquito species with only a few cases where the marker could not distinguish closely related species. Our results also validate the presence of new species identified based on morphology, plus potential cases of cryptic species. We found that both COI and 16S markers performed very well, with successful identifications at the species level of up to 98% for COI and 97% for 16S when compared to traditional taxonomy. This shows great potential for the use of metabarcoding for vector monitoring and eco-epidemiological studies. © 2017 Talaga et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Address |
UMR EDB, CNRS, ENFA, Université de Toulouse Paul Sabatier, Toulouse, France |
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| Notes |
Export Date: 22 June 2017 |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
757 |
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| Author |
Courtois, E.A.; Paine, C.E.T.; Blandinieres, P.A.; Stien, D.; Bessiere, J.M.; Houel, E.; Baraloto, C.; Chave, J. |
| Title |
Diversity of the Volatile Organic Compounds Emitted by 55 Species of Tropical Trees: a Survey in French Guiana |
Type |
Journal Article |
| Year |
2009 |
Publication |
Journal of Chemical Ecology |
Abbreviated Journal |
J. Chem. Ecol. |
| Volume |
35 |
Issue |
11 |
Pages |
1349-1362 |
| Keywords |
VOCs; Chemical diversity; Sesquiterpenes; Tropical; French Guiana |
| Abstract |
Volatile organic compounds (VOCs) are produced by a broad range of organisms, from bacteria to mammals, and they represent a vast chemical diversity. In plants, one of the preeminent roles of VOCs is their repellent or cytotoxic activity, which helps the plant deter its predators. Most studies on VOCs emitted by vegetative parts have been conducted in model plant species, and little is known about patterns of VOC emissions in diverse plant communities. We conducted a survey of the VOCs released immediately after mechanical damage of the bark and the leaves of 195 individual trees belonging to 55 tropical tree species in a lowland rainforest of French Guiana. We discovered a remarkably high chemical diversity, with 264 distinct VOCs and a mean of 37 compounds per species. Two monoterpenes (alpha-pinene and limonene) and two sesquiterpenes (beta-caryophyllene and alpha-copaene), which are known to have cytotoxic and deterrent effects, were the most frequent compounds in the sampled species. As has been established for floral scents, the blend of VOCs is largely species-specific and could be used to discriminate among 43 of the 55 sampled species. The species with the most diverse blends were found in the Sapindales, Laurales, and Magnoliales, indicating that VOC diversity is not uniformly distributed among tropical species. Interspecific variation in chemical diversity was caused mostly by variation in sesquiterpenes. This study emphasizes three aspects of VOC emission by tropical tree species: the species-specificity of the mixtures, the importance of sesquiterpenes, and the wide-ranging complexity of the mixtures. |
| Address |
[Courtois, Elodie A.; Blandinieres, Pierre-Alain; Stien, Didier; Houel, Emeline] CNRS, UMR Ecofog, F-97337 Cayenne, France, Email: courtois@cict.fr |
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SPRINGER |
Place of Publication |
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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 |
0098-0331 |
ISBN |
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Conference |
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| Notes |
ISI:000273086100009 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
73 |
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| Author |
Herault, B.; Thoen, D. |
| Title |
Diversity of plant assemblages in isolated depressional wetlands from Central-Western Europe |
Type |
Journal Article |
| Year |
2008 |
Publication |
Biodiversity and Conservation |
Abbreviated Journal |
Biodivers. Conserv. |
| Volume |
17 |
Issue |
9 |
Pages |
2169-2183 |
| Keywords |
closed depressions; connectivity; fens; forest; grassland; habitat area; landscape matrix |
| Abstract |
A closed depression is defined as a geomorphologic element where a sediment depository is encircled by hillslopes. Despite the fact that closed depressions are often the only stagnant water points in many European landscapes, few ecological researches on their plant assemblages have been done. The main goal of this study was to give first results of the environmental factors responsible for the vegetation composition, richness and rarity in the closed depressions of the Lorraine biogeographical district (Belgium, France and grand-duche de Luxembourg). We surveyed for plant presence 85 forest and 77 grassland closed depressions. For each site, wetland area, local environmental factors and regional connectivities registered. For each species, the Ellenberg values were compiled. To investigate the main source of variation in species composition and in species richness (including richness in rare species), Non-metric Multidimensional Scaling analyses and Generalized Linear Models were respectively used. Species pools in forest (forest and preforest species) and in grassland (bog plants, pioneers, helophytes) were quite different. In both landscapes, a gradient from plants typical of basic high-productive soils to plants typical of acid low-productive soils reflects a shared successional gradient. The accumulation of organic matter allowed the establishment of Sphagnum spp., which slowly acidified the soil and thus acted as ecosystem engineers for the arrival of bog plants. Moreover, the species composition was additionally driven by the plant light tolerance in forests and by the plant water requirements in grasslands. Mechanisms of species accumulation (increase in species richness) were different in forests and in grasslands: respectively related to the plant light tolerance and to the wetland area. At the regional level, the averaged soil productivity was negatively related to the richness in rare species. Indeed, perennial highly-competitive plants such as Glyceria spp., Iris pseudacorus or Urtica dioica impeded the establishment of smaller and rarer species. At the habitat level, isolated closed depressions (due to either low connectivity or low grazing pressure) have more habitat rare species, giving evidences of dispersal limitation in plant assemblages of closed depressions. |
| Address |
[Herault, Bruno] Inst Bot, Ctr Ecol Vegetale & Hydrol, F-67083 Strasbourg, France, Email: bruno.herault@cirad.fr |
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SPRINGER |
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Edition |
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| ISSN |
0960-3115 |
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| Notes |
ISI:000257486400008 |
Approved |
no |
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EcoFoG @ eric.marcon @ |
Serial |
135 |
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| Author |
Aili, S.R.; Touchard, A.; Escoubas, P.; Padula, M.P.; Orivel, J.; Dejean, A.; Nicholson, G.M. |
| Title |
Diversity of peptide toxins from stinging ant venoms |
Type |
Journal Article |
| Year |
2014 |
Publication |
Toxicon |
Abbreviated Journal |
Toxicon |
| Volume |
92 |
Issue |
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Pages |
166-178 |
| Keywords |
Ant venom; Chemotaxonomy; Disulfide linkage; Peptides; Venom biochemistry |
| Abstract |
Ants (Hymenoptera: Formicidae) represent a taxonomically diverse group of arthropods comprising nearly 13,000 extant species. Sixteen ant subfamilies have individuals that possess a stinger and use their venom for purposes such as a defence against predators, competitors and microbial pathogens, for predation, as well as for social communication. They exhibit a range of activities including antimicrobial, haemolytic, cytolytic, paralytic, insecticidal and pain-producing pharmacologies. While ant venoms are known to be rich in alkaloids and hydrocarbons, ant venoms rich in peptides are becoming more common, yet remain understudied. Recent advances in mass spectrometry techniques have begun to reveal the true complexity of ant venom peptide composition. In the few venoms explored thus far, most peptide toxins appear to occur as small polycationic linear toxins, with antibacterial properties and insecticidal activity. Unlike other venomous animals, a number of ant venoms also contain a range of homodimeric and heterodimeric peptides with one or two interchain disulfide bonds possessing pore-forming, allergenic and paralytic actions. However, ant venoms seem to have only a small number of monomeric disulfide-linked peptides. The present review details the structure and pharmacology of known ant venom peptide toxins and their potential as a source of novel bioinsecticides and therapeutic agents. |
| Address |
Laboratoire Écologie Fonctionnelle et Environnement, Université de Toulouse, 118 Route de NarbonneToulouse, France |
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Thesis |
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| Publisher |
Elsevier Ltd |
Place of Publication |
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Summary Language |
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Edition |
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00410101 (Issn) |
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| Notes |
Export Date: 2 December 2014; Coden: Toxia; Correspondence Address: Nicholson, G.M.; Neurotoxin Research Group, School of Medical and Molecular Biosciences, University of Technology SydneyAustralia |
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no |
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EcoFoG @ webmaster @ |
Serial |
568 |
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Amusant, N.; Nigg, M.; Thibaut, B.; Beauchene, J. |
| Title |
Diversity of decay resistance strategies of durable tropical woods species: Bocoa prouacencsis Aublet, Vouacapoua americana Aublet, Inga alba (Sw.) Wild |
Type |
Journal Article |
| Year |
2014 |
Publication |
International Biodeterioration & Biodegradation |
Abbreviated Journal |
Int. Biodeterior. Biodegrad. |
| Volume |
94 |
Issue |
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Pages |
103-108 |
| Keywords |
Decay resistance; Density; Heartwood; Sapwood; Tropical wood; Wood extractive; Decay resistance; Heartwood; Sapwood; Tropical wood; Wood extractives; Density (specific gravity); Andira aubletii; Bocoa; Inga |
| Abstract |
The study of decay resistance in wood is of interest for wood end-users but also for the global carbon balance since wood biodegradation is a key driver of forest ecosystem functioning through its impacts on carbon and nutrient cycling. We studied the density and wood extractive contents in order to understand decay resistance against soil microflora after 90 days exposure of sapwood and heartwood from three Neotropical wood species known for their decay resistance: Bocoa prouacensis, Vouacapoua americana, Inga alba. Decay resistance was correlated with density more than wood extractive content. The results highlighted different decay resistance strategies. In B. prouacensis, both sapwood and heartwood were highly resistant due to the high density and high content of antifungal wood extractives. In V. americana heartwood, decay resistance was due to the high synergistic-acting wood extractive content. Conversely, with the least dense wood species I. alba, we found that decay resistance was due to the antifungal wood extractives synthesized early in the sapwood. In conclusion, we showed that the three wood species with the same level of heartwood decay resistance performance had different decay resistance strategies according to the anatomic and defensive wood traits. |
| Address |
CNRS, CCo Pl E. Bataillon, Laboratoire de Me´canique et Ge´nie Civile, Universite´ de Montpellier 2Montpellier Cedex 5, France |
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Elsevier Ltd |
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09648305 (Issn) |
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Export Date: 1 October 2014; Coden: Ibbie; Correspondence Address: Amusant, N.; CIRAD UMR Ecologie des foreˆts de GuyaneFrance |
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no |
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EcoFoG @ webmaster @ |
Serial |
561 |
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Ghislain, B.; Engel, J.; Clair, B.; Donaldson, L.; Baas, P. |
| Title |
Diversity of anatomical structure of tension wood among 242 tropical tree species |
Type |
Journal Article |
| Year |
2019 |
Publication |
IAWA Journal |
Abbreviated Journal |
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| Volume |
40 |
Issue |
4 |
Pages |
765-784 |
| Keywords |
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| Abstract |
Angiosperm trees produce tension wood to actively control their vertical position. Tension wood has often been characterised by the presence of an unlignified inner fibre wall layer called the G-layer. Using this definition, previous reports indicate that only one-third of all tree species have tension wood with G-layers. Here we aim to (i) describe the large diversity of tension wood anatomy in tropical tree species, taking advantage of the recent understanding of tension wood anatomy and (ii) explore any link between this diversity and other ecological traits of the species. We sampled tension wood and normal wood in 432 trees from 242 species in French Guiana. The samples were observed using safranin and astra blue staining combined with optical microscopy. Species were assigned to four anatomical groups depending on the presence/absence of G-layers, and their degree of lignification. The groups were analysed for functional traits including wood density and light preferences. Eighty-six% of the species had G-layers in their tension wood which was lignified in most species, with various patterns of lignification. Only a few species did not have G-layers. We found significantly more species with lignified G-layers among shade-tolerant and shade-demanding species as well as species with a high wood density. Our results bring up-to-date the incidence of species with/without G-layers in the tropical lowland forest where lignified G-layers are the most common anatomy of tension wood. Species without G-layers may share a common mechanism with the bark motor taking over the wood motor. We discuss the functional role of lignin in the G-layer. |
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Brill |
Place of Publication |
Leiden, The Netherlands |
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no |
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EcoFoG @ webmaster @ |
Serial |
903 |
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| Author |
Ghislain, B.; Clair, B. |
| Title |
Diversity in the organisation and lignification of tension wood fibre walls – A review |
Type |
Journal Article |
| Year |
2017 |
Publication |
IAWA Journal |
Abbreviated Journal |
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| Volume |
38 |
Issue |
2 |
Pages |
245-265 |
| Keywords |
diversity; fibres; G-layer; lignification; multilayered tension wood fibre walls; S1 + S2 + S3 + G; Tension wood |
| Abstract |
Tension wood, a tissue developed by angiosperm trees to actively recover their verticality, has long been defined by the presence of an unlignified cellulosic inner layer in the cell wall of fibres, called the G-layer. Although it was known that some species have no G-layer, the definition was appropriate since it enabled easy detection of tension wood zones using various staining techniques for either cellulose or lignin. For several years now, irrespective of its anatomical structure, tension wood has been defined by its high mechanical internal tensile stress. This definition enables screening of the diversity of cell walls in tension wood fibres. Recent results obtained in tropical species with tension wood with a delay in the lignification of the G-layer opened our eyes to the effective presence of large amounts of lignin in the G-layer of some species. This led us to review older literature mentioning the presence of lignin deposits in the G-layer and give them credit. Advances in the knowledge of tension wood fibres allow us to reconsider some previous classifications of the diversity in the organisation of the fibre walls of the tension wood. © 2017 International Association of Wood Anatomists. |
| Address |
CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane, Kourou, France |
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Export Date: 2 September 2017 |
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no |
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EcoFoG @ webmaster @ |
Serial |
763 |
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