A5074305323- Plant Molecular Biology Research
- Plant Parasitism and Resistance
- Plant Virus Research Studies
- Plant and animal studies
- RNA Interference and Gene Delivery
- RNA Research and Splicing
- Mycorrhizal Fungi and Plant Interactions
- Plant Reproductive Biology
- RNA and protein synthesis mechanisms
- MicroRNA in disease regulation
- Plant nutrient uptake and metabolism
- Transgenic Plants and Applications
- Chromosomal and Genetic Variations
- Antimicrobial Peptides and Activities
- Plant Disease Resistance and Genetics
- Photosynthetic Processes and Mechanisms
- RNA modifications and cancer
- Nematode management and characterization studies
- Plant tissue culture and regeneration
- Genetic Mapping and Diversity in Plants and Animals
- Biofuel production and bioconversion
- Cancer-related molecular mechanisms research
- Plant Gene Expression Analysis
- Plant and Fungal Species Descriptions
- Insect Resistance and Genetics
Laboratoire de Recherche en Sciences Végétales
2009-2022
Centre National de la Recherche Scientifique
2009-2021
Université Toulouse III - Paul Sabatier
2009-2021
Université de Toulouse
2012-2021
Bipar
2015
Unité de Recherche Pluridisciplinaire Prairies et Plantes Fourragères
2009
Institut Jean-Pierre Bourgin
2006-2009
Laboratoire de Biologie et Modélisation de la Cellule
2009
Institut National de la Recherche Agronomique
2006
Genomic traces of symbiosis loss A between certain bacteria and their plant hosts delivers fixed nitrogen to the plants. Griesmann et al. sequenced several genomes analyze why nitrogen-fixing is irregularly scattered through evolutionary tree (see Perspective by Nagy). Various carried lost pathways that could have supported symbiosis. It seems this symbiosis, which relies on multiple complex interorganismal signaling, susceptible selection prone being over time. Science , issue p. eaat1743 ;...
Abstract Most land plant species live in symbiosis with arbuscular mycorrhizal fungi. These fungi differentiate essential functional structures called arbuscules root cortical cells from which mineral nutrients are released to the plant. We investigated role of microRNA393 (miR393), an miRNA that targets several auxin receptors, colonization. Expression precursors miR393 was down-regulated during mycorrhization three different species: Solanum lycopersicum, Medicago truncatula, and Oryza...
Abstract The eukaryotic defense response posttranscriptional gene silencing (PTGS) is directed by short-interfering RNAs and thwarts invading nucleic acids via the RNA slicing activity of conserved ARGONAUTE (AGO) proteins. PTGS can be counteracted exogenous or endogenous suppressors, including cytoplasmic exoribonuclease XRN4, which also degrades microRNA (miRNA)-guided mRNA cleavage products but does not play an obvious role in development. Here, we show that nuclear exoribonucleases XRN2...
Most land plants live symbiotically with arbuscular mycorrhizal fungi. Establishment of this symbiosis requires signals produced by both partners: strigolactones in root exudates stimulate pre-symbiotic growth the fungus, which releases lipochito-oligosaccharides (Myc-LCOs) that prepare plant for symbiosis. Here, we have investigated events downstream early signaling roots. We report expression miR171h, a microRNA targets NSP2, is up-regulated elongation zone during colonization Rhizophagus...
MicroRNAs (miRNAs) are transcribed as long primary transcripts (pri-miRNAs) by RNA polymerase II. Plant pri-miRNAs encode regulatory peptides called miPEPs, which specifically enhance the transcription of pri-miRNA from they originate. However, paradoxically, whereas miPEPs have been identified in different plant species, poorly conserved, raising question mechanisms underlying their specificity. To address this point, we identify and re-annotate multiple Arabidopsis thaliana order to ORF...
The Arabidopsis ARGONAUTE1 (AGO1) and ZWILLE/PINHEAD/AGO10 (ZLL) proteins act in the miRNA siRNA pathways are essential for multiple processes development. Here, we analyze what determines common specific function of both proteins. Analysis ago1 mutants with partially compromised AGO1 activity revealed that loss ZLL re-establishes a subset target genes. Loss led to increased protein levels, whereas mRNA levels were unchanged, implicating as negative regulator at level. Since ZLL, unlike...
Abstract The current agriculture main challenge is to maintain food production while facing multiple threats such as increasing world population, temperature increase, lack of agrochemicals due health issues and uprising weeds resistant herbicides. Developing novel, alternative, safe methods hence paramount importance. Here, we show that complementary peptides (cPEPs) from any gene can be designed target specifically plant coding genes. External application synthetic increases the abundance...
The putative RNA-binding protein SUPPRESSOR OF GENE SILENCING 3 (SGS3) protects RNA from degradation before transformation into dsRNA by the RNA-dependent polymerase RDR6 during plant post-transcriptional gene silencing and trans-acting small interfering (siRNA) pathways. In this study, we show that SGS3 acts as a homodimer, point mutation sgs3-3 impairs in dominant-negative manner through formation of SGS3/sgs3-3 heterodimers. Unlike complete-loss-of-function sgs3 mutants, which are...
Strigolactones were recently identified as a new class of plant hormones involved in the control shoot branching. The characterization strigolactone mutants several species has progressively revealed their contribution to other aspects development roots and shoots. In this article, we characterize strigolactone-deficient strigolactone-insensitive model legume Medicago truncatula for aerial developmental traits. most striking mutant phenotype observed was compact architecture. contrast with...
Abstract Background Recent genome-wide studies of many species reveal the existence a myriad RNAs differing in size, coding potential and function. Among these are long non-coding RNAs, some them producing functional small peptides via translation short ORFs. It now appears that any kind RNA presumably has to encode peptides. Accordingly, our team recently discovered plant primary transcripts microRNAs ( pri-miRs ) produce regulatory (miPEPs) involved auto-regulatory feedback loops enhancing...
Strigolactones (SLs) trigger germination of parasitic plant seeds and hyphal branching symbiotic arbuscular mycorrhizal (AM) fungi. There is extensive structural variation in SLs plants usually produce blends different SLs. The among natural has been shown to impact their biological activity as seed stimulants. In this study, rice root exudates were fractioned by HPLC. resulting fractions analyzed MRM-LC-MS investigate the presence tested using bioassays assess Striga hermonthica Gigaspora...
Calcium-dependent protein kinases (CDPKs or CPKs) are a unique family of Ca2+-regulated with diverse functions in plants. CPK28 regulates immune homeostasis, stress responses, and growth multiple angiosperms including tomato, rice, cotton, Arabidopsis thaliana (hereafter, Arabidopsis). In Arabidopsis, phosphorylates activates the E3 ubiquitin ligases PLANT U-BOX 25 (PUB25) PUB26 that target major signaling BOTRYTIS-INDUCED KINASE 1 (BIK1), resulting its turnover. The CPK28-PUB25/26-BIK1...
Summary Background Recent genome-wide studies of many species reveal the existence a myriad RNAs differing in size, coding potential and function. Among these are long non-coding RNAs, some them producing functional small peptides via translation short ORFs. It now appears that any kind RNA presumably has to encode peptides. Accordingly, our team recently discovered plant primary transcripts microRNAs ( pri-miRNAs ) produce regulatory (miPEPs) involved auto-regulatory feedback loops...