Abdelhafid Bendahmane
A5075687774- Plant Virus Research Studies
- Plant Molecular Biology Research
- Plant Reproductive Biology
- Chromosomal and Genetic Variations
- Plant Disease Resistance and Genetics
- Legume Nitrogen Fixing Symbiosis
- Plant tissue culture and regeneration
- Plant-Microbe Interactions and Immunity
- Plant Physiology and Cultivation Studies
- Plant Genetic and Mutation Studies
- Plant and animal studies
- Photosynthetic Processes and Mechanisms
- Genetic and Environmental Crop Studies
- Advances in Cucurbitaceae Research
- Agricultural pest management studies
- Plant Pathogenic Bacteria Studies
- Postharvest Quality and Shelf Life Management
- Insect-Plant Interactions and Control
- Plant Pathogens and Resistance
- Plant Parasitism and Resistance
- Plant Pathogens and Fungal Diseases
- CRISPR and Genetic Engineering
- Nematode management and characterization studies
- Plant biochemistry and biosynthesis
- Insect Resistance and Genetics
Centre National de la Recherche Scientifique
2016-2025
Institut des Sciences des Plantes de Paris Saclay
2016-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2025
Université Paris-Saclay
2017-2025
Huazhong Agricultural University
2025
École Normale Supérieure de Lyon
2025
Université Paris Cité
2015-2024
Université Paris-Sud
2015-2021
Sorbonne Paris Cité
2017-2021
Institut Jean-Pierre Bourgin
2008-2021
Insights from the annotated wheat genome Wheat is one of major sources food for much world. However, because bread wheat's a large hybrid mix three separate subgenomes, it has been difficult to produce high-quality reference sequence. Using recent advances in sequencing, International Genome Sequencing Consortium presents an with detailed analysis gene content among subgenomes and structural organization all chromosomes. Examples quantitative trait mapping CRISPR-based modification show...
The coordinated expression of highly related homoeologous genes in polyploid species underlies the phenotypes many world's major crops. Here we combine extensive gene datasets to produce a comprehensive, genome-wide analysis homoeolog patterns hexaploid bread wheat. Bias varies between tissues, with ~30% wheat homoeologs showing nonbalanced expression. We found asymmetries along chromosomes, largest inter-tissue, inter-cultivar, and coding sequence variation, most often located...
Rx-mediated extreme resistance against potato virus X in does not involve a necrotic hypersensitive response at the site of initial infection and thereby differs from more usual type disease plants. However, Rx protein is structurally similar to products genes conferring response. We show both Nicotiana spp that has potential initiate cell death but separate epistatic necrosis. These data indicate pathogen arrest are responses
We report the first annotated chromosome-level reference genome assembly for pea, Gregor Mendel's original genetic model. Phylogenetics and paleogenomics show genomic rearrangements across legumes suggest a major role repetitive elements in pea evolution. Compared to other sequenced Leguminosae genomes, shows intense gene dynamics, most likely associated with size expansion when Fabeae diverged from its sister tribes. During Pisum evolution, translocation transposition differentially...
Roses have high cultural and economic importance as ornamental plants in the perfume industry. We report rose whole-genome sequencing assembly resequencing of major genotypes that contributed to domestication. generated a homozygous genotype from heterozygous diploid modern progenitor, Rosa chinensis 'Old Blush'. Using single-molecule real-time meta-assembly approach, we obtained one most comprehensive plant genomes date. Diversity analyses highlighted mosaic origin 'La France', first...
Abstract The function of PsBRC1, the pea (Pisum sativum) homolog maize (Zea mays) TEOSINTE BRANCHED1 and Arabidopsis (Arabidopsis thaliana) (AtBRC1) genes, was investigated. Psbrc1 mutant displays an increased shoot-branching phenotype, is able to synthesize strigolactone (SL), does not respond SL application. level pleiotropy SL-deficient ramosus1 (rms1) higher than in mutant, rms1 exhibiting a relatively dwarf phenotype more extensive branching at upper nodes. PsBRC1 gene mostly expressed...
Andromonoecy is a widespread sexual system in angiosperms characterized by plants carrying both male and bisexual flowers. In melon, this form controlled the identity of alleles at andromonoecious ( ) locus. Cloning gene reveals that andromonoecy results from mutation active site 1-aminocyclopropane-1-carboxylic acid synthase. Expression enzyme inhibits development organs not required for carpel development. A causal single-nucleotide polymorphism associated with was identified, which...
How flowers separate males and females Most flowering plant families have bisexual with both male female function. However, most members of the Cucurbiticeae family, which includes melons, cucumbers, gourds, unisexual flowers. To understand this difference in sex expression, Boualem et al. identified a cucumber gene expressed Mutations were associated solely By integrating finding into determination model, authors explain how can coexist same plant. Science, issue p. 688
Abstract The complex and dynamic three-dimensional organization of chromatin within the nucleus makes understanding control gene expression challenging, but also opens up possible ways to epigenetically modulate expression. Because plants are sessile, they evolved sophisticated rapidly in response environmental stress, that thought be coordinated by changes conformation mediate specific cellular physiological responses. However, what extent how stress induces reorganization remains poorly...
In many species with sex chromosomes, the Y is a tiny chromosome. However, dioecious plant Silene latifolia has giant ~550-megabase chromosome, which remained unsequenced so far. We used long- and short-read hybrid approach to obtain high-quality male genome. Comparative analysis of chromosomes their homologs in outgroups showed that highly rearranged degenerated. Recombination suppression between X extended several steps triggered massive accumulation repeats on as well nonrecombining...
Polyploidization is a common occurrence in the evolutionary history of flowering plants, significantly contributing to their adaptability and diversity. However, molecular mechanisms behind these adaptive advantages are not well understood. Through comprehensive phenotyping diploid tetraploid clones from Citrus Poncirus genera, we discovered that genome doubling enhances salt stress resilience. Epigenetic transcriptomic analyses revealed increased ethylene production roots plants was...
Summary We show here that the pvr2 locus in pepper, conferring recessive resistance against strains of potato virus Y (PVY), corresponds to a eukaryotic initiation factor 4E ( eIF4E ) gene. RFLP analysis on PVY‐susceptible and resistant pepper cultivars, using an cDNA from tobacco as probe, revealed perfect map co‐segregation between polymorphism gene alleles, 1 (resistant PVY‐0) 2 PVY‐0 1). The cloned encoded 228 amino acid polypeptide with 70–86% nucleotide sequence identity other plant s....
Summary The isolation of the nematode‐resistance gene Gpa2 in potato is described, and it demonstrated that highly homologous resistance genes a single resistance‐gene cluster can confer to distinct pathogen species. Molecular analysis locus resulted identification an R‐ four region approximately 115 kb. At least two these are active: one corresponds previously isolated Rx1 confers virus X, while other cyst nematode Globodera pallida . proteins encoded by share overall homology over 88%...
Summary Rx in potato encodes a protein with nucleotide binding site (NBS) and leucine‐rich repeats (LRR) that confers resistance against Potato virus X. The NBS LRR domains are present many disease proteins plants regulators of apoptosis animals. To investigate structure‐function relationships NBS‐LRR we exploited the potential to mediate cell death response. With wild‐type is elicited only presence viral coat protein. However, following random mutagenesis , identified mutants which...
Rx2 confers resistance against potato virus X (PVX). To clone Rx2, we developed a system based on Agrobacterium-mediated transient expression of candidate R genes in transgenic tobacco leaves expressing the PVX coat protein elicitor Rx2-mediated resistance. Using this system, gene eliciting HR specifically presence was identified. Based genetical and functional analysis, it is concluded that cloned Rx2. The potentially adaptable to cloning any other gene. locus chromosome V encoded highly...
Background The characterization of natural recessive resistance genes and Arabidopsis virus-resistant mutants have implicated translation initiation factors the eIF4E eIF4G families as susceptibility required for virus infection function. Methodology/Principal Findings To investigate further role in we set up a TILLING platform tomato, cloned encoding screened induced mutations that lead to resistance. A splicing mutant eukaryotic factor, S.l_eIF4E1 G1485A, was identified characterized with...
In the last decade, availability of gene sequences many plant species, including tomato, has encouraged development strategies that do not rely on genetic transformation techniques (GMOs) for imparting desired traits in crops. One these new emerging technology is TILLING (Targeting Induced Local Lesions Genomes), a reverse genetics tool, which proving to be very valuable creating different crop species.To apply mutant collection was generated background processing tomato cultivar Red Setter...
Summary The characterization of natural recessive resistance genes and virus‐resistant mutants Arabidopsis have implicated translation initiation factors the 4E family [eIF4E eIF(iso)4E] as susceptibility required for virus multiplication expression. To date, viruses controlled by these mainly belong to Potyviridae. Melon necrotic spot (MNSV) belongs Tombusviridae (genus Carmovirus) is an uncapped non‐polyadenylated RNA virus. In melon, nsv ‐mediated a source against all strains MNSV except...