A5052580242- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Plant and animal studies
- Plant Parasitism and Resistance
- Ecology and Vegetation Dynamics Studies
- Conservation, Biodiversity, and Resource Management
- Plant Reproductive Biology
- Botany, Ecology, and Taxonomy Studies
- Environmental and Cultural Studies in Latin America and Beyond
- Insect and Pesticide Research
- Hydrocarbon exploration and reservoir analysis
- Botanical Studies and Applications
- Plant Ecology and Taxonomy Studies
- Horticultural and Viticultural Research
- Plant Molecular Biology Research
- Plant and soil sciences
- Bryophyte Studies and Records
- Fermentation and Sensory Analysis
- Lichen and fungal ecology
- Building Energy and Comfort Optimization
- Plant chemical constituents analysis
- Plant Taxonomy and Phylogenetics
- Essential Oils and Antimicrobial Activity
- Botany and Plant Ecology Studies
- Natural product bioactivities and synthesis
Conservatory and Botanical Garden of the City of Geneva
2015-2024
University of Geneva
2015-2024
Universidade Federal da Bahia
2022
Sorbonne Université
2021
IFP Énergies nouvelles
2021
Missouri Botanical Garden
2006
Royal Botanic Gardens, Kew
2001
Gesneriaceae are represented in the New World (NW) by a major clade (c. 1000 species) currently recognized as subfamily Gesnerioideae. Radiation of this group occurred all biomes tropical America and was accompanied extensive phenotypic ecological diversification. Here we performed phylogenetic analyses using DNA sequences from three plastid loci to reconstruct evolutionary history Gesnerioideae investigate its relationship with other lineages Lamiales. Our molecular data confirm inclusion...
Chautems, A., V.F. Dutra, A.P. Fontana, M. Peixoto, Perret & J. Rossini (2019). Three new species of Sinningia (Gesneriaceae) endemic to Espírito Santo, Brazil. Candollea 74: 33–42. In English, English abstract. DOI: http://dx.doi.org/10.15553/c2019v741a5Three Nees occurring in eastern Brazil and the state Santo are described illustrated: flammea Chautems Rossini, hoehnei Fontana stapelioides Peixoto. is unique within genus by its tubular bright orange corolla with a greenish-yellow throat....
The effects of specific functional groups pollinators in the diversification angiosperms are still to be elucidated. We investigated whether pollination shifts or association with hummingbirds affected a highly diverse angiosperm lineage Neotropics. reconstructed phylogeny 583 species from Gesneriaceae family and detected through time, inferred timing amount transitions among pollinator groups, tested between hummingbird speciation extinction rates. identified high frequency transitions,...
Chautems, A. & M. Perret (2017). Description and phylogenetic position of a new species Nematanthus (Gesneriaceae) from Bahia, Brazil. Candollea 72: 351–359. In English, English abstract. DOI: http://dx.doi.org/10.15553/c2017v722a13Nematanthus exsertus Gesneriaceae the state Bahia in Brazil, is described. It easily distinguished other Schrad. by its pendent resupinate flowers with funnel-shaped laterally compressed corolla combined striking exserted stamens style. According to analyses based...
Gesneriaceae (ca. 3400 species) is a pantropical plant family with wide range of growth form and floral morphology that are associated repeated adaptations to different environments pollinators. Although systematics has been largely improved by the use Sanger sequencing data, our understanding evolutionary history group still far from complete due limited number informative characters provided this type data. To overcome limitation, we developed here Gesneriaceae-specific gene capture kit...
A putative correlation between nectar sugar composition and pollination syndrome was evaluated in the tribe Sinningieae (Neotropical Gesneriaceae). Sucrose, fructose glucose were quantified of 45 species using high performance anion-exchange chromatography. Representative hummingbird, bee, bat moth syndromes sampled relation to their numeric importance tribe. In hummingbird bee flowers, which represent 95% Sinningieae, sucrose-dominant (ratio [sucrose]/[hexose] > 1). Sugar ratios below one...
For nearly all species in the three genera of tribe Sinningieae (Gesneriaceae), Sinningia , Paliavana and Vanhouttea (mostly southeastern Brazil) plus 10 outgroups, we have sequenced six non‐coding DNA regions (i.e., plastid intergenic spacers trnT‐trnL, trnL‐trnF, trnS‐trnG, atpB‐rbcL introns trnL rpl16 genes) four nuclear plastid‐expressed glutamine synthetase gene ( ncpGS ). Separate combined analyses these data sets using maximum parsimony supported monophyly Sinningieae, but were found...
The geographical pattern of speciation and the relationship between floral variation species ranges were investigated in tribe Sinningieae (Gesneriaceae), which is found mainly Atlantic forests Brazil. Geographical distribution data recorded on a grid system 0.5 x degree intervals near-complete species-level phylogenetic tree inferred from simultaneous analysis seven DNA regions used to address role isolation speciation. range overlaps sister lineages measured across all nodes analyzed...
The systematic position and generic differentiation of the morphologically geographically outstanding tribe Epithemateae (Gesneriaceae) was analyzed using rbcL/atpB-spacer trnL-F intron-spacer regions chloroplast DNA. In our analysis forms a strongly supported monophyletic clade (bootstrap [BS] = 100%; jackknife [JK] decay index [DI] 12) appears as sister to rest paleotropical Gesneriaceae (= subfamily Cyrtandroideae). form group (BS 88%; JK 85%; DI 3) that is neotropical (subfamily...
The tribe Geonomateae is a widely distributed group of 103 species Neotropical palms which contains six ecologically important understory or subcanopy genera. Although it has been the focus many studies, our understanding evolutionary history this group, and in particular taxonomically complex genus Geonoma, far from complete due to lack molecular data. Specifically, previous Sanger sequencing-based studies used few informative characters partial sampling. To overcome these limitations, we...
The historical biogeography of the tribe Sinningieae (Gesneriaceae) was analyzed based on distribution data and a molecular species-level phylogeny 76 species. This plant group is distributed from Mexico to northern Argentina, but by far highest diversity occurs within Brazilian Atlantic forest. dispersal-vicariance analysis method cladistic approach were used infer ancestral areas as well patterns dispersal vicariance. Results indicate that probably arose in coastal rain forest or...
Abstract Aim The rich flora of the Caribbean islands and surrounding mainland evolved in a context isolation alternated with phases terrestrial connectivity between landmasses, climatic fluctuations episodes mass extinctions during Cenozoic. We explored how these events affected evolution sister palm tribes Cryosophileae Sabaleae, continent‐island exchanges, endemic radiations extinction shaped their extant diversity. Location American continent including region. Methods reconstructed...
Abstract Background Major factors influencing the phenotypic diversity of a lineage can be recognized by characterizing extent and mode trait evolution between related species. Here, we compared evolutionary dynamics traits associated with floral morphology climatic preferences in clade composed genera Codonanthopsis, Codonanthe Nematanthus (Gesneriaceae). To test specific components that lead to this group, performed Bayesian phylogenetic analysis combined nuclear plastid DNA sequences...
The Gesneriaceae consists of around 150 genera and c. 3750 species with a predominantly tropical subtropical distribution across all continents. Although previous studies have proposed an American origin Gesneriaceae, the biogeographic history this pantropical plant family is still unclear, particularly in Old World. To address this, we assembled most comprehensively sampled matrix 143 355 species, including key samples from Sri Lanka analysed here for first time. We generated molecular...
The palm genus Trithrinax is revised and three species four varieties are accepted (T. brasiliensis var. brasiliensis, T. acanthocoma, campestris, schizophylla biflabellata comb. nov.). This taxonomic treatment presents detailed complete description of all taxa, based on the studies natural populations in Argentina, Brazil Paraguay, morphological analysis herbarium specimens (including available types) an exhaustive literature research. Illustrations presented for taxa identification keys to...
Abstract The European Alps show a high degree of endemism associated mainly with the location glacial refugia and environmental heterogeneity. Several Alpine endemics have evolved in genus Alyssum. Here we study perennial Alyssum populations Western Alps, distributed Aosta Valley region, which hosts species diversity, although are rare. We addressed recently described stenoendemic A. rossetii taxonomically uncertain usually attributed to montanum s.s. clarify their phylogenetic position...
Changes in floral pigmentation can have dramatic effects on angiosperm evolution by making flowers either attractive or inconspicuous to different pollinator groups. Flower color largely depends the type and abundance of pigments produced petals, but it is still unclear whether similar signals rely same biosynthetic pathways which extent activation certain influences course evolution. To address these questions, we investigated physical chemical aspects Neotropical Gesnerioideae (ca. 1,200...
Abstract A new species of Gesneriaceae discovered in remnants deciduous forests on limestone outcrops Minas Gerais, Brazil, is described and compared with morphologically related taxa. This plant presents the diagnostic features tribe Gloxinieae, but a unique combination morphological traits distinguishes this taxon from previously genera. Its phylogenetic position was inferred based analyzing DNA sequences variation five loci: rpl16 intron, rps16 trnL ‐ F intron‐spacer, portion...
Abstract Aim Central America is largely covered by hyperdiverse, yet poorly understood, rain forests. Understorey palms are diverse components of these forests, but little known about their historical assembly. It not clear when in reached present diversity levels and whether most species arrived from neighbouring regions or evolved locally. We addressed questions using the species‐rich American palm clades indicative reconstructed compared phylogenomic biogeographical history with...
Premise of the study: Despite extensive phenotypic variation that characterizes Gesneriaceae family, there is a lack genomic resources to investigate molecular basis their diversity. We developed and compared transcriptomes for two species Neotropical lineage Gesneriaceae. Methods Results: Illumina sequencing de novo assembly floral leaf samples were used generate multigene sequence data Sinningia eumorpha S. magnifica , endemic Brazilian Atlantic Forest. A total 300 million reads assemble...