A5072825485- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Algal biology and biofuel production
- Biocrusts and Microbial Ecology
- Paleontology and Stratigraphy of Fossils
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Protist diversity and phylogeny
- Genomics and Phylogenetic Studies
- Geology and Paleoclimatology Research
- Spaceflight effects on biology
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Hydrocarbon exploration and reservoir analysis
- Plant-Microbe Interactions and Immunity
- Photosynthetic Processes and Mechanisms
- Music and Audio Processing
- Enzyme Catalysis and Immobilization
- Diverse Musicological Studies
- Planetary Science and Exploration
- Microbial Metabolic Engineering and Bioproduction
- Legume Nitrogen Fixing Symbiosis
- Light effects on plants
- Isotope Analysis in Ecology
- Porphyrin and Phthalocyanine Chemistry
University of Liège
2015-2024
Gembloux Agro-Bio Tech
2019
BOKU University
2017
Institute of Hydrobiology, Biology Centre, Academy of Sciences of the Czech Republic
2017
Phytopathogenic fungi affecting crop and post-harvested vegetables are a major threat to food production storage. To face these drawbacks, producers have become increasingly dependent on agrochemicals. However, intensive use of compounds has led the emergence pathogen resistance severe negative environmental impacts. There also number plant diseases for which chemical solutions ineffective or non-existent as well an increasing demand by consumers pesticide-free food. Thus, biological control...
Publicly available genomes are crucial for phylogenetic and metagenomic studies, in which contaminating sequences can be the cause of major problems. This issue is expected to especially important Cyanobacteria because axenic strains notoriously difficult obtain keep culture. Yet, despite their great scientific interest, no data currently concerning quality publicly cyanobacterial genomes. As reliably detecting contaminants a complex task, we designed pipeline combining six methods consensus...
Abstract In this study, we report on the ability of yeast Yarrowia lipolytica W29 to produce an extracellular melanin‐like brown pigment at high yield (0.5 mg/ml) in culture medium supplemented with L‐tyrosine. This has been characterized as pyomelanin and its synthesis was found occur by so‐called HGA‐melanin pathway. The purified embedded antioxidant properties it exhibited a radical scavenging activity toward 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) IC 50 230 μg/ml. It also noncytotoxic two...
Molecular assessment of a large portion traditional cyanobacterial taxa has been hindered by the failure to isolate and grow them in culture. In this study, we developed an optimized protocol for single cell/filament isolation 16S rRNA gene sequencing terrestrial cyanobacteria with mucilaginous sheaths, applied it determine phylogenetic position typical members genera Petalonema Stigonema . A methodology based on glass‐capillary technique semi‐nested PCR enabled reliable from all samples...
Abstract The acquisition of photosynthesis is a fundamental step in the evolution eukaryotes. However, few phototrophic organisms are unambiguously recognized Precambrian record. situ detection metabolic byproducts individual microfossils key for direct identification their metabolisms. Here, we report new integrative methodology using synchrotron-based X-ray fluorescence and absorption. We evidence bound nickel-geoporphyrins moieties low-grade metamorphic rocks, preserved within cells ~1...
Benthic microbial mats dominated by Cyanobacteria are important features of polar lakes. Although culture-independent studies have provided insights into the diversity Cyanobacteria, only a handful genomes been sequenced to date. Here, we applied genome-resolved metagenomics approach data obtained from Arctic, sub-Antarctic and Antarctic mats. We recovered 37 metagenome-assembled (MAGs) representing 17 distinct species, most which distantly related that so far. These include (i) lineages...
The terrestrial Antarctic Realm has recently been divided into 16 Conservation Biogeographic Regions (ACBRs) based on environmental properties and the distribution of biota. Despite their prominent role in primary production nutrient cycling lakes, cyanobacteria were only poorly represented biological dataset used to delineate these ACBRs. Here, we provide a first high-throughput sequencing insight spatial benthic cyanobacterial communities lakes located four distinct, geographically distant...
Deciphering the fossil record of cyanobacteria is crucial to understand their role in chemical and biological evolution early Earth. They profoundly modified redox conditions ecosystems more than 2.4 Ga ago, age Great Oxidation Event (GOE), provided ancestor chloroplast by endosymbiosis, leading diversification photosynthetic eukaryotes. Here, we analyze morphology, ultrastructure, composition, metals distribution Polysphaeroides filiformis from 1040–1006 Ma Mbuji-Mayi Supergroup (DR Congo)....
Bacillus velezensis is considered as a model species belonging to the so-called subtilis complex that evolved typically dwell in soil rhizosphere niche and establish an intimate association with plant roots. This bacterium provides protection its natural host against diseases represents one of most promising biocontrol agents. However, molecular basis cross talk this establishes has been poorly investigated. We show here these plant-associated bacteria have polymer-sensing system perceive...
Northern hemisphere rockweeds (Fucus) are thought to have evolved in the North Pacific and then spread Atlantic following opening of Bering Strait. They dispersed widely speciated its tributary seas. Fucus distichus is likely near ancestral member this genus, studies shown that there several species/subspecies complex (i.e. F. evanescens gardneri). We used phylogenetic haplotype analyses test relationships biogeography distichus. Our data subsequent demonstrate that, unlike previous lacked...
Abstract BACKGROUND Publicly available genomes are crucial for phylogenetic and metagenomic studies, in which contaminating sequences can be the cause of major problems. This issue is expected to especially important Cyanobacteria because axenic strains notoriously difficult obtain keep culture. Yet, despite their great scientific interest, no data currently concerning quality publicly cyanobacterial genomes. RESULTS As reliably detecting contaminants a complex task, we designed pipeline...
The Antarctic terrestrial macrobiota are highly endemic and biogeographically structured, but whether this also holds true for microbial groups remains poorly understood. We studied the biogeographic patterns of cyanobacteria from benthic mats sampled in 84 lakes two sub‐Antarctic islands, as well eight Conservation Biogeographic Regions (ACBRs) which were previously defined based mainly on macroscopic taxa. Analysis 16S rRNA gene sequences revealed that host significantly different...
Abstract Benthic microbial mats dominated by Cyanobacteria are important features of polar lakes. Although culture-independent studies have provided insights into their diversity, only a handful genomes been sequenced to date. Here, we applied genome-resolved metagenomics approach data obtained from Arctic, sub-Antarctic, and Antarctic mats. We recovered 22 unique metagenome-assembled (MAGs) Cyanobacteria, most which distantly related that so far. These include i) lineages common in such as...
ABSTRACT Phormidesmis priestleyi ULC007 is an Antarctic freshwater cyanobacterium. Its draft genome 5,684,389 bp long. It contains a total of 5,604 protein-encoding genes, which 22.2% have no clear homologues in known genomes. To date, this the first one ever determined for axenic cyanobacterium from Antarctica.
Ultraviolet (UV)-screening compounds represent a substantial asset for the survival of cyanobacteria in extreme environments exposed to high doses UV radiations on modern and early Earth. Among these molecules, halochromic pigment gloeocapsin remains poorly characterized studied. In this study, we identified gloeocapsin-producing cultivable cyanobacteria: strain Phormidesmis nigrescens ULC007. We succeeded extract, partially purify, compare dark blue from both ULC007 culture an environmental...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 69:135-143 (2013) - DOI: https://doi.org/10.3354/ame01628 A cultivation-independent approach for genetic and cyanotoxin characterization of colonial cyanobacteria Yannick Lara1, Alexandre Lambion1, Diana Menzel2, Geoffrey A. Codd2, Annick Wilmotte1,* 1Center Protein Engineering, University Liège, 4000 Belgium 2Division...
replicate samples: no number of 278 specification method(s) used for sampling and sorting:For microscopy counting, 250 mL sample were immediately fixed with lug concentrated by settling 24h.Then concentrate samples preserved addition neutral formaldehyde (2-4% final concentration).Other specifications GIS layers, shape files related to the dataset