A5067871248- Marine and coastal plant biology
- Algal biology and biofuel production
- Microbial Community Ecology and Physiology
- Diatoms and Algae Research
- Biocrusts and Microbial Ecology
- Coral and Marine Ecosystems Studies
- Coastal wetland ecosystem dynamics
- Photosynthetic Processes and Mechanisms
- Cephalopods and Marine Biology
- Marine Ecology and Invasive Species
- Plant Molecular Biology Research
- Identification and Quantification in Food
- Protist diversity and phylogeny
- Seaweed-derived Bioactive Compounds
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Plant Reproductive Biology
- Marine Biology and Ecology Research
- Physiological and biochemical adaptations
- Mycobacterium research and diagnosis
- Epigenetics and DNA Methylation
- Light effects on plants
- Echinoderm biology and ecology
- Microfluidic and Bio-sensing Technologies
- Reproductive biology and impacts on aquatic species
Max Planck Institute for Developmental Biology
2024
Max Planck Institute for Biology
2024
Ghent University
2012-2024
Ghent University Hospital
2021-2023
University of Liège
2017-2019
VIB-UGent Center for Plant Systems Biology
2017
SUMMARY Sex chromosomes fall into three classes: XX/XY, ZW/ZZ and U/V systems. The rise, evolution demise of systems have remained enigmatic to date. Here, we analyze genomes spanning the entire brown algal phylogeny decipher their sex-determination evolutionary history. birth sex evolved more than 250 million years ago, when a pivotal male-determinant located in discrete region proto-U proto-V ceased recombining. Over time, nested inversions led step-wise expansions, accompanying increasing...
Abstract Knowledge of life cycle progression and reproduction seaweeds transcends pure academic interest. Successful sustainable seaweed exploitation domestication will indeed require excellent control the factors controlling growth reproduction. The relative dominance ploidy-phases their respective morphologies, however, display tremendous diversity. Consequently, ecological endogenous cycles are likely to be equally varied. A vast number research papers addressing theoretical,...
SUMMARY Brown seaweeds are keystone species of coastal ecosystems, often forming extensive underwater forests, that under considerable threat from climate change. Despite their ecological and evolutionary importance, this phylogenetic group, which is very distantly related to animals land plants, still poorly characterised at the genome level. Here we analyse 60 new genomes include all major brown algal orders. Comparative analysis these indicated occurrence several events coinciding...
Brown seaweeds are keystone species of coastal ecosystems, often forming extensive underwater forests, and under considerable threat from climate change. In this study, analysis multiple genomes has provided insights across the entire evolutionary history lineage, initial emergence, through later diversification brown algal orders, down to microevolutionary events at genus level. Emergence lineage was associated with a marked gain new orthologous gene families, enhanced protein domain...
Abstract Background The molecular mechanism underlying sexual reproduction in land plants is well understood model and a target for crop improvement. However, unlike plants, the genetic basis involved triggering gamete formation remains elusive most seaweeds, which are increasingly viewed as an alternative source of functional food feedstock energy applications. Results Gametogenesis Ulva mutabilis , organism green was studied. We analyzed transcriptome dynamics at different time points...
Effective monitoring of non-indigenous seaweeds and combatting their effects relies on a solid confirmation the status respective species. We critically analysed presumed seaweed species reported from Mediterranean Sea, Northeast Atlantic Ocean Macaronesia, resulting in list 140 whose nature is undisputed. For an additional 87 it unclear if they are native or (cryptogenic species) identity requires (data deficient species). discuss factors underlying both taxonomic biogeographic...
Summary The role of maternal tissue in embryogenesis remains enigmatic many complex organisms. Here, we investigate the contribution to apical–basal patterning kelp embryo. Focussing on Undaria pinnatifida , studied effects detachment from using microsurgery, staining cell wall modifications, morphometric measurements, flow cytometry, genotyping and a modified fertilisation protocol synchronising embryogenesis. Detached embryos are rounder often show aberrant morphologies. When part oogonial...
Acetate can be efficiently metabolized by the green microalga Chlamydomonas reinhardtii. The regular concentration is 17 mM, although higher concentrations are reported to increase starch and fatty acid content. To understand responses acetate concentrations, cells were cultivated in batch mode light at 17, 31, 44, 57 mM acetate. Metabolic analyses show that grown possess increased contents of all components analyzed (starch, chlorophylls, acids, proteins), with a three-fold volumetric...
Auxin controls body plan patterning in land plants and has been proposed to play a similar role the development of brown algae (Phaeophyta) despite their distant evolutionary relationship with plants. The mechanism auxin action remains controversial because contradicting conclusions derived from pharmacological studies on Fucus. In this study, we used Dictyota dichotoma as model system show that plays during apical-basal embryo algae. Indole-3-acetic acid was detectable D. germlings mature...
Fucoid zygotes have been extensively used to study cell polarization and asymmetrical division. Fertilized eggs are responsive different environmental cues (e.g. light, gravity) for a long period before the polarity is fixed cells germinate accordingly. First, it commonly believed that direction sense of vector established simultaneously as indicated by formation an F-actin patch. Secondly, upon reorientation zygote, new polar gradient formed assumed position future rhizoid pole only...
Cellular morphogenesis in land plants and brown algae is typically a slow process involving growth established by an interplay of turgor pressure cell wall rigidity. However, recent study showed that zygotes the alga Dictyota dichotoma undergo rapid shape change from sphere to elongated spheroid about 90 s, establishing first body axis.
The usual cultivation mode of the green microalga Chlamydomonas is liquid medium and light. However, can also be grown on agar plates in darkness. Our aim to analyze compare gene expression cells cultivated these different conditions. For that purpose, RNA-seq data are obtained from samples two labs four environmental conditions (agar@light, agar@dark, liquid@light, liquid@dark). RNA seq analyzed by surprisal analysis, which allows simultaneous meta-analysis all samples. First we identify a...
Abstract Effective monitoring and combatting the effect of non-indigenous seaweeds relies on a solid confirmation status species. We critically analysed presumed seaweed species reported from Mediterranean Sea, Northeast Atlantic Ocean Macaronesia, resulting in list 140 whose nature is undisputed. For an additional 87 it unclear if they are native or (cryptogenic species) their identity requires (data deficient species). discuss factors underlying both taxonomic biogeographic uncertainties...