A5057707449- Plant Molecular Biology Research
- Plant Reproductive Biology
- Plant nutrient uptake and metabolism
- Chromosomal and Genetic Variations
- Microtubule and mitosis dynamics
- Plant tissue culture and regeneration
- Genetic diversity and population structure
- Ecology and Conservation Studies
- Genetic Mapping and Diversity in Plants and Animals
- Plant Taxonomy and Phylogenetics
- Plant Gene Expression Analysis
- Ubiquitin and proteasome pathways
- Photosynthetic Processes and Mechanisms
- Plant-Microbe Interactions and Immunity
- Plant Genetic and Mutation Studies
University of Oslo
2017-2024
Institut thématique Génétique, génomique et bioinformatique
2023
John Wiley & Sons (United States)
2023
Hudson Institute
2023
John Wiley & Sons (United Kingdom)
2023
University of Oxford
2023
Institut de Biologie Moléculaire des Plantes
2010-2017
Université de Strasbourg
2010-2017
Centre National de la Recherche Scientifique
2010-2015
Significance Hybrid seed lethality has been recognized and addressed by a long-standing tradition of plant-breeding research. Nevertheless, its role in evolution speciation underestimated. In this study, hybrid between Arabidopsis lyrata arenosa , two model species growing interest the scientific community, was investigated. This study shows that endosperm defects are sufficient to explain direction gene flow wild species, suggesting an important hybridization barrier plant speciation....
The decision to replicate its DNA is of crucial importance for every cell and, in many organisms, decisive the progression through entire cycle. A comparison animals versus yeast has shown that, although most involved cell-cycle regulators are divergent both clades, they fulfill a similar role and overall network topology G1/S regulation highly conserved. Using germline development as model system, we identified regulatory cascade controlling entry into S phase flowering plant Arabidopsis...
To produce seeds, flowering plants need to specify somatic cells undergo meiosis. Here, we reveal a regulatory cascade that controls the entry into meiosis starting with group of redundantly acting cyclin-dependent kinase (CDK) inhibitors KIP-RELATED PROTEIN (KRP) class. KRPs function by restricting CDKA;1-dependent inactivation Arabidopsis Retinoblastoma homolog RBR1. In rbr1 and krp triple mutants, designated meiocytes several mitotic divisions, resulting in formation supernumerary give...
Cell-fate specification is typically thought to precede and determine cell-cycle regulation during differentiation. Here we show that endoreplication, also known as endoreduplication, a specialized variant often associated with cell differentiation but frequently occurring in malignant cells, plays role maintaining fate. For our study have used Arabidopsis trichomes model system manipulated endoreplication levels via mutants of regulators overexpression inhibitors under trichome-specific...
The best-characterized members of the plant-specific SIAMESE-RELATED (SMR) family cyclin-dependent kinase inhibitors regulate transition from mitotic cell cycle to endoreplication, also known as endoreduplication, an altered version in which DNA is replicated without division. Some other are implicated responses biotic and abiotic stresses. However, functions most SMRs remain unknown, specific complexes inhibited by unclear. Here, we demonstrate that a diverse group SMRs, including SMR...
One of the predominant cell-cycle programs found in mature tissues is endoreplication, also known as endoreduplication, that leads to cellular polyploidy. A key question for understanding endoreplication cycles how oscillating levels cyclin-dependent kinase activity are generated control repeated rounds DNA replication. The APC/C performs a pivotal function mitotic cell cycle by promoting anaphase and paving road new round However, using marker lines plants which components knocked down, we...
Leaves show considerable variation in shape, and may be described as simple, when the leaf is entire, or dissected, divided into individual leaflets. Here, we report that SIMPLE LEAF3 (SIL3) gene a novel determinant of shape Cardamine hirsuta - dissected-leaved relative simple-leaved model species Arabidopsis thaliana. We SIL3 required for growth leaflet formation but initiation less sensitive to perturbation activity. further KNOX (knotted1-like homeobox) expression localized auxin activity...
Genomic imprinting regulates parent-specific transcript dosage during seed development and is mainly confined to the endosperm. Elucidation of function many imprinted genes has been hampered by lack corresponding mutant phenotypes, role associated with genome regulation or allocation resources. Disruption also suggested mediate endosperm-based post-zygotic hybrid barriers depending on genetic variation gene dosage. Here, we have analyzed conservation a clade from MADS-box type I class...
Arabidopsis thaliana diverged from A. arenosa and lyrata at least 6 million years ago. The three species differ by genome-wide polymorphisms morphological traits. are to a high degree reproductively isolated, but hybridization barriers incomplete. A special type of barrier is based on the triploid endosperm seed, where embryo lethality caused failure support developing embryo. MADS-box I family transcription factors specifically expressed in has been proposed play role endosperm-based...
Abstract In flowering plants, a distinct post-zygotic hybridization barrier between closely related species can arise during seed maturation, resulting in embryo lethality due to abnormal endosperm development. The initially works as nutrient sink, acquiring nutrients from adjacent tissues, but later undergoes cellularization, switching serve source. hybrid seeds, this cellularization switch be hampered if the genomic ratio is imbalanced. Disruption caused when of different ploidy are...
Summary Arabidopsis thaliana diverged from A. arenosa and lyrata at least 6 million years ago are identified by genome-wide polymorphisms or morphological traits. The species to a high degree reproductively isolated, but hybridization barriers incomplete. A special type of barrier is based in the triploid endosperm seed, where embryo lethality caused failure support developing embryo. MADS-box I family transcription factors specifically expressed has been proposed play role endosperm-based...