A5023882505- Plant Molecular Biology Research
- Plant tissue culture and regeneration
- Light effects on plants
- Plant-Microbe Interactions and Immunity
- Plant Stress Responses and Tolerance
- Plant Reproductive Biology
- Plant nutrient uptake and metabolism
- Photosynthetic Processes and Mechanisms
- Legume Nitrogen Fixing Symbiosis
- Plant Parasitism and Resistance
- Per- and polyfluoroalkyl substances research
- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Transgenic Plants and Applications
- Seed Germination and Physiology
- Plant responses to water stress
- Plant Genetic and Mutation Studies
- Plant Physiology and Cultivation Studies
- Plant Disease Resistance and Genetics
- Plant Gene Expression Analysis
- Plant Pathogens and Resistance
- Polysaccharides and Plant Cell Walls
- Microbial Metabolic Engineering and Bioproduction
- Biofuel production and bioconversion
- Biocrusts and Microbial Ecology
University of Antwerp
2016-2025
Utrecht University
1994-2007
Forschungszentrum Jülich
2007
Antwerp University Hospital
1990-2001
Janssen (Belgium)
1998
Vlaams Instituut voor Biotechnologie
1997
Ghent University
1995-1997
University of the Assumption
1995
KU Leuven
1995
Agricultural University Plovdiv
1994
Abstract Reactive oxygen species and redox signaling undergo synergistic antagonistic interactions with phytohormones to regulate protective responses of plants against biotic abiotic stresses. However, molecular insight into the nature this crosstalk remains scarce. We demonstrate that hydrogen peroxide–responsive UDP-glucosyltransferase UGT74E2 Arabidopsis thaliana is involved in modulation plant architecture water stress response through its activity toward auxin indole-3-butyric acid...
Current understanding of the integration cell division and expansion in development plant lateral organs such as leaves is limited. Cell number established during a mitotic phase, subsequent growth into mature organ relies primarily on accompanied by endocycles. Here we show that three Arabidopsis cyclin D3 (CYCD3) genes are expressed overlapping but distinct patterns developing shoot meristem. Triple loss-of-function mutants CYCD3 function essential neither for cycle nor morphogenesis....
Abscisic acid (ABA) and jasmonates have been implicated in responses to water deficit wounding. We compared the molecular physiological effects of jasmonic (JA) (< or = 10 microM), ABA, salt stress roots rice. JA markedly induced a cationic peroxidase, two novel 32- 28-kD proteins, acidic PR-1 PR-10 pathogenesis-related stress-responsive SalT protein roots. Most JA-responsive proteins (JIPs) from also accumulated when plants were subjected stress. None JIPs treated with ABA. did not induce...
Abstract Culturing leaf protoplast-derived cells of the embryogenic alfalfa (Medicago sativa subsp. varia A2) genotype in presence low (1 μm) or high (10 2, 4-dichlorophenoxyacetic acid (2,4-D) concentrations results different cell types. Cells exposed to 2,4-D concentration remain small with dense cytoplasm and can develop into proembryogenic clusters, whereas protoplasts cultured at auxin elongate subsequently die form undifferentiated colonies. Fe stress applied nonlethal mm) 1 μm2,4-D...
The Indica rice (Oryza sativa L.) varieties Pokkali and Nona Bokra are well-known salt tolerance donors in classical breeding. In an attempt to understand the molecular basis of their tolerance, physiological gene expression studies were initiated. effect abscisic acid (ABA) on total proteins roots from 12-d-old seedlings Pokkali, Bokra, salt-sensitive cultivar Taichung N1 analyzed two-dimensional gels. abundance ABA-induced was highest most tolerant variety, Pokkali. Three ABA-responsive...
Summary A new auxin homeostasis gene in Arabidopsis called SUR2 has been identified. This gene, mapped to the bottom of chromosome 4, is defined by two recessive nuclear mutants designated superroot2 ( sur2 ), which display several abnormalities reminiscent effects. number these characteristics are similar phenotype previously described auxin‐overproducing mutant superroot1 sur1 ); however, lines evidences reveal that defines a key point regulation endogenous concentrations. The double...
Abiotic stress may affect plant response to pathogen attack through induced alterations in growth regulator and gene expression. Abscisic acid (ABA) mediates several responses abiotic stress. The effects of drought, salt ABA on the interaction tomato ( Lycopersicon esculentum ) with biotrophic fungus Oidium neolycopersici necrotrophic Botrytis cinerea were investigated. Drought resulted a twofold increase endogenous as well 50% reduction B. infection significant suppression O. cv....
The Arabidopsis ABSCISIC ACID–INSENSITIVE3 (ABI3) protein plays a crucial role during late seed development and has an additional function at the vegetative meristem, particularly periods of growth-arresting conditions quiescence. Here, we show that ABI3 homolog poplar (PtABI3) is expressed in buds natural bud set. Expression occurs clearly after perception critical daylength initiates set dormancy poplar. In short-day mimicking set, expression chimeric PtABI3::β-glucuronidase (GUS) gene...
Understanding the complete picture of floral transition is still impaired by fact that physiological studies mainly concern plant species whose genetics poorly known, and vice versa. Arabidopsis thaliana has been successfully used to unravel signalling pathways genetic molecular approaches, but analyses are required determine signals involved in control transition. In this work, putative role cytokinins was investigated using vegetative plants (Columbia) induced flower synchronously a single...
Abstract We have studied the mechanism of UV protection in two duckweed species (Lemnaceae) by exploiting sensitivity photosystem II as an situ sensor for radiation stress. A UV-tolerantSpirodela punctata G.F.W. Meyer ecotype had significantly higher indole-3-acetic acid (IAA) levels than a UV-sensitive ecotype. Parallel work on Lemna gibbamutants suggested that tolerance is linked to IAA degradation rather free or conjugated IAA. This linkage consistent with role class III phenolic...
• Ultraviolet B (UV-B) acclimation comprises complex and poorly understood changes in plant metabolism. The effects of chronic ecologically relevant UV-B dose rates on Arabidopsis thaliana were determined. process was studied by measuring radiation morphology, physiology, biochemistry gene expression. Chronic did not affect photosynthesis or the expression stress responsive genes, which indicated that UV-acclimated plants stressed. UV-induced morphological acclimated included decreased...
Anthropogenic activities cause metal pollution worldwide. Plants can absorb and accumulate these metals through their root system, inducing stress as a result of excess concentrations inside the plant. Ethylene is regulator multiple plant processes, affected by many biotic abiotic stresses. Increased ethylene levels have been observed after exposure to but it remains unclear how increased are achieved at molecular level. In this study, effects cadmium (Cd) on production its precursor...
Plants respond to environmental stress by synthesizing a range of secondary metabolites for defense purposes. Here we report on the effect chronic ultraviolet ( UV ) radiation accumulation plant in Arabidopsis thaliana leaves. In natural environment, is highly dynamic parameter and therefore hypothesized that plants are continuously readjusting levels metabolites. Our data show distinct kinetic profiles tocopherols, polyamines flavonoids upon acclimation. The lipid‐soluble antioxidant...
Cytokinin flow from roots to shoots can serve as a long-distance signal important for root-to-shoot communication. In the past, changes in cytokinin have been mainly attributed rate of synthesis or breakdown roots. The present research tested possibility that active uptake by root cells may also influence its export shoots. To this end, we collapsed proton gradient across membranes using protonophore carbonyl cyanide m-chlorophenylhydrazone (CCCP) inhibit secondary exogenous and endogenous...
Ultraviolet-B (UV-B) radiation affects leaf growth in a wide range of species. In this work, we demonstrate that UV-B levels present solar inhibit maize (Zea mays) without causing any other visible stress symptoms, including the accumulation DNA damage. We conducted kinematic analyses cell division and expansion to understand impact on these cellular processes. Our results decrease UV-B-irradiated leaves is consequence reduction production shortened zone (GZ). To determine molecular pathways...
Abstract Introduction In Alzheimer's disease (AD), pathologic amyloid‐beta (Aβ) is synaptotoxic and impairs neuronal function at the microscale, influencing brain networks macroscale before Aβ deposition. The latter can be detected noninvasively, in vivo , using resting‐state functional MRI (rsfMRI), a technique used to assess connectivity (FC). Methods RsfMRI was performed longitudinally TG2576 PDAPP mice, starting deposition determine earliest FC changes. Additionally, role of on early...
Significance Plants show remarkable regenerative abilities, allowing them to recover from wounds and organ loss. This capacity is controlled in part by auxin, the most promiscuous plant hormone controlling organogenesis tissue patterning. We that stem cell death diverges auxin flow, much like rocks a stream, resulting an accumulation tissues surrounding wound. demonstrate within these tissues, wound-induced expression of plant-specific transcription factor ERF115 works synergistically with...
Abstract To understand the growth response to drought, we performed a proteomics study in leaf zone of maize ( Zea mays L.) seedlings and functionally characterized role starch biosynthesis regulation growth, photosynthesis antioxidant capacity, using shrunken‐2 mutant sh2 ), defective ADP‐glucose pyrophosphorylase. Drought altered abundance 284 proteins overrepresented for photosynthesis, amino acid, sugar metabolism, redox‐regulation. Changes protein levels correlated with enzyme...