Publications by authors named "Pflieger S"

The afila (af) mutation causes the replacement of leaflets by a branched mass of tendrils in the compound leaves of pea - Pisum sativum L. This mutation was first described in 1953, and several reports of spontaneous af mutations and induced mutants with a similar phenotype exist. Despite widespread introgression into breeding material, the nature of af and the origin of the alleles used remain unknown.

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R-BPMV is located within a recently expanded TNL cluster in the Phaseolus genus with suppressed recombination and known for resistance to multiple pathogens including potyviruses controlled by the I gene. Bean pod mottle virus (BPMV) is a comovirus that infects common bean and legumes in general. BPMV is distributed throughout the world and is a major threat on soybean, a closely related species of common bean.

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Purpose: To systematically review patient-reported outcome measures (PROMs) of musicians' musculoskeletal symptoms (MSS) and psychosocial factors and their psychometric properties.

Methods: Six databases were searched. Studies evaluating at least one psychometric property of a PROM developed for or adapted to adult musicians and measuring MSS or occupational psychosocial factors were included.

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RNA silencing serves key roles in a multitude of cellular processes, including development, stress responses, metabolism, and maintenance of genome integrity. Dicer, Argonaute (AGO), double-stranded RNA binding (DRB) proteins, RNA-dependent RNA polymerase (RDR), and DNA-dependent RNA polymerases known as Pol IV and Pol V form core components to trigger RNA silencing. Common bean () is an important staple crop worldwide.

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In the context of climate change, elevated temperature is a major concern due to the impact on plant-pathogen interactions. Although atmospheric temperature is predicted to increase in the next century, heat waves during summer seasons have already become a current problem. Elevated temperatures strongly influence plant-virus interactions, the most drastic effect being a breakdown of plant viral resistance conferred by some major resistance genes.

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Identifying the molecular basis of resistance to pathogens is critical to promote a chemical-free cropping system. In plants, nucleotide-binding leucine-rich repeat constitute the largest family of disease resistance (R) genes, but this resistance can be rapidly overcome by the pathogen, prompting research into alternative sources of resistance. Anthracnose, caused by the fungus Colletotrichum lindemuthianum, is one of the most important diseases of common bean.

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The presence of seed color in common bean (Phaseolus vulgaris) requires the dominant-acting P (pigment) gene, and white seed is a recessive phenotype in all domesticated races of the species. P was classically associated with seed size, thus describing it as the first genetic marker for a quantitative trait. The molecular structure of P was characterized to understand the selection of white seeds during bean diversification and the relationship of P to seed weight.

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Viruses are obligate parasites that replicate intracellularly in many living organisms, including plants. Consequently, no chemicals are available that target only the virus without impacting host cells or vector organisms. The use of natural resistant varieties appears as the most reliable control strategy and remains the best and cheapest option in managing virus diseases, especially in the current ecological context of preserving biodiversity and environment in which the use of phytosanitary products becomes limited.

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Plant viral vectors have been developed to facilitate gene function studies especially in plant species not amenable to traditional mutational or transgenic modifications. In the Fabaceae plant family, the most widely used viral vector is derived from Bean pod mottle virus (BPMV). Originally developed for overexpression of foreign proteins and VIGS studies in soybean, we adapted the BPMV-derived vector for use in other legume species such as Phaseolus vulgaris and Pisum sativum.

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Pea (Pisum sativum L.) is an important legume worldwide. The importance of pea in arable rotations and nutritional value for both human and animal consumption have fostered sustained production and different studies to improve agronomic traits of interest.

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Common bean (Phaseolus vulgaris) is the most important grain legume for direct human consumption in the world, particularly in developing countries where it constitutes the main source of protein. Unfortunately, common bean yield stability is constrained by a number of pests and diseases. As use of resistant genotypes is the most economic and ecologically safe means for controlling plant diseases, efforts have been made to genetically characterize resistance genes (R genes) in common bean.

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Background: Over the last two years, considerable advances have been made in common bean (Phaseolus vulgaris L.) genomics, especially with the completion of the genome sequence and the availability of RNAseq data. However, as common bean is recalcitrant to stable genetic transformation, much work remains to be done for the development of functional genomics tools adapted to large-scale studies.

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The Co - x anthracnose R gene of common bean was fine-mapped into a 58 kb region at one end of chromosome 1, where no canonical NB-LRR-encoding genes are present in G19833 genome sequence. Anthracnose, caused by the phytopathogenic fungus Colletotrichum lindemuthianum, is one of the most damaging diseases of common bean, Phaseolus vulgaris. Various resistance (R) genes, named Co-, conferring race-specific resistance to different strains of C.

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Legume species are among the most important crops worldwide. In recent years, six legume genomes have been completely sequenced, and there is now an urgent need for reverse-genetics tools to validate genes affecting yield and product quality. As most legumes are recalcitrant to stable genetic transformation, virus-induced gene silencing (VIGS) appears to be a powerful alternative technology for determining the function of unknown genes.

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Subtelomeric regions in eukaryotic organisms are known for harboring species-specific tandemly repeated satellite sequences. However, studies on the molecular organization and evolution of subtelomeric repeats are scarce, especially in plants. Khipu is a satellite DNA of 528-bp repeat unit, specific of the Phaseolus genus, with a subtelomeric distribution in common bean, P.

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Article Synopsis
  • The replication of positive-strand RNA viruses, like the Turnip yellow mosaic virus (TYMV), depends on the viral RNA-dependent RNA polymerase (RdRp) called 66K.
  • Understanding how RdRp is regulated is crucial, as its degradation by the proteasome occurs later during infection and impacts viral RNA replication in Arabidopsis thaliana cells.
  • Researchers identified specific regions in the 66K protein responsible for its degradation and found that certain Lysine residues influence its stability, showing that the ubiquitin-proteasome system plays a key role in regulating viral replication.
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Article Synopsis
  • Virus-induced gene silencing (VIGS) uses viral vectors containing fragments of plant genes to silence target genes and study their functions in plants.* -
  • A new viral vector from Turnip yellow mosaic virus (TYMV) effectively induces VIGS in Arabidopsis thaliana when carrying an inverted-repeat fragment of a gene, allowing for simple inoculation methods.* -
  • Research shows that a 76 bp fragment is adequate for gene silencing across various plant tissues, making the TYMV-derived vector a promising tool for functional genomics in Arabidopsis.*
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Drought is a major constraint for the production of common bean (Phaseolus vulgaris L.). To identify molecular responses to water deficit, we performed a differential display RT-PCR (DDRT) analysis using roots of bean plants grown aeroponically and submitted to dehydration.

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Central to the process of plus-strand RNA virus genome amplification is the viral RNA-dependent RNA polymerase (RdRp). Understanding its regulation is of great importance given its essential function in viral replication and the common architecture and catalytic mechanism of polymerases. Here we show that Turnip yellow mosaic virus (TYMV) RdRp is phosphorylated, when expressed both individually and in the context of viral infection.

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Phytophthora capsici Leonian, known as the causal agent of the stem, collar and root rot, is one of the most serious problems limiting the pepper crop in many areas in the world. Genetic resistance to the parasite displays complex inheritance. Quantitative trait locus (QTL) analysis was performed in three intraspecific pepper populations, each involving an unrelated resistant accession.

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Partial restriction of cucumber mosaic virus (CMV) long-distance movement originating from the Capsicum annuum inbred line 'Vania' was assessed in a doubled-haploid progeny using two screening methods: the first allowed one to assess the resistance of adult plants decapitated above the fourth leaf and inoculated on the third leaf using a common CMV strain, and the second allowed one to assess CMV resistance to long-distance movement on seedlings inoculated using an atypical CMV strain. For both resistance tests, the behavior of the F(1) hybrid between 'Vania' and the susceptible line 'H3' indicated that partial resistance is inherited as a dominant trait. Phenotypic data from the two screening methods were correlated but the one performed on seedlings was much more severe.

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Three populations composed of a total of 215 doubled haploid lines and 151 F2 individuals were used to design an intraspecific consensus map of pepper (Capsicum annuum L.). The individual maps varied from 685 to 1668 cM with 16 to 20 linkage groups (LGs).

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The hypersensitive resistance to tomato spotted wilt virus (TSWV) in pepper is determined by a single dominant gene (resistant allele: Tsw) in several Capsicum chinense genotypes. In order to facilitate the selection for this resistance, four RAPD (among 250 10-mer primers tested) were found linked to the Tsw locus using the bulked segregant analysis and 153 F2 individuals. A close RAPD marker was converted into a codominant cleaved amplified polymorphic sequence (CAPS) using specific PCR primers and restriction enzymes.

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Whereas resistance genes (R-genes) governing qualitative resistance have been isolated and characterized, the biological roles of genes governing quantitative resistance (quantitative trait loci, QTLs) are still unknown. We hypothesized that genes at QTLs could share homologies with cloned R-genes. We used a PCR-based approach to isolate R-gene analogs (RGAs) with consensus primers corresponding with conserved domains of cloned R-genes: (i) the nucleotide binding site (NBS) and hydrophobic domain, and (ii) the kinase domain.

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JAR choriocarcinoma cells have retained several characteristics of normal trophoblasts and have been used as an in vitro trophoblast model. The superfusion system is suitable for the study of hormone synthesis and/or secretion. JAR cells were cultured and transferred to the superfusion system in order to evaluate the spontaneous hCG secretion and the effect of GnRH.

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