Valentin Joly

Valentin Joly
Yale University | YU · Department of Molecular, Cellular and Developmental Biology

Doctor of Philosophy
FRQNT Postdoctoral Fellow, Jacob Lab, MCDB, Yale University

About

40
Publications
1,866
Reads
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57
Citations
Additional affiliations
September 2019 - present
Yale University
Position
  • PostDoc Position
June 2016 - August 2016
Nagoya University
Position
  • Research internship, MITACS-JSPS Summer Program
May 2016 - May 2016
Linköping University
Position
  • Research internship
Education
January 2013 - August 2019
Université de Montréal
Field of study
  • Plant Molecular Biology
January 2012 - December 2012
Université de Montréal
Field of study
  • Plant Molecular Biology
September 2008 - December 2011
Sorbonne Université
Field of study
  • Biology

Publications

Publications (40)
Article
The tail of replication-dependent histone H3.1 varies from that of replication-independent H3.3 at the amino acid located at position 31 in plants and animals, but no function has been assigned to this residue to demonstrate a unique and conserved role for H3.1 during replication. We found that TONSOKU (TSK/TONSL), which rescues broken replication...
Article
Full-text available
Epigenetic mechanisms play diverse roles in the regulation of genome stability in eukaryotes. In Arabidopsis thaliana, genome stability is maintained during DNA replication by the H3.1K27 methyltransferases ARABIDOPSIS TRITHORAX-RELATED PROTEIN 5 (ATXR5) and ATXR6, which catalyze the deposition of K27me1 on replication-dependent H3.1 variants. The...
Preprint
Full-text available
In plants, genome stability is maintained during DNA replication by the H3.1K27 methyltransferases ATXR5 and ATXR6, which catalyze the deposition of K27me1 on replication-dependent H3.1 variants. Loss of H3.1K27me1 in atxr5 atxr6 double mutants leads to heterochromatin defects, including transcriptional de-repression and genomic instability, but th...
Poster
Full-text available
Sexual reproduction in flowering plants involves intimate contact and continuous interactions between the growing pollen tube and the female reproductive structures. These interactions can affect gynoecia gene expression well ahead of fertilization. Genes modulated from a distance in the ovary represent one class of such genes. But how precisely ca...
Article
Full-text available
Sexual reproduction in flowering plants involves intimate contact and continuous interactions between the growing pollen tube and the female reproductive structures. These interactions can trigger responses in distal regions of the flower well ahead of fertilization. While pollination-induced petal senescence has been studied extensively, less is k...
Article
Fertilization-related kinase (FRK) is a group of the mitogen-activated protein kinase kinase kinase (MAP3K or MEKK) that has proliferated in Solanaceae species. Studies on the wild potato Solanum chacoense have shown that three ScFRKs are directly involved in female gametophyte development. Decreasing the expression of ScFRK1 and ScFRK3 by RNA inte...
Article
Full-text available
When plants conquered land, they developed specialized organs, tissues, and cells in order to survive in this new and harsh terrestrial environment. New cell polymers such as the hydrophobic lipid-based polyesters cutin, suberin, and sporopollenin were also developed for protection against water loss, radiation, and other potentially harmful abioti...
Presentation
Small, secreted cysteine-rich proteins (CRPs) combine a highly stable cysteine spacing, ensuring conservation of their 3D structure and function, and hypervariable inter-cysteine blocks, allowing quick evolution of specific recognition domains. Interestingly, several CRPs were shown to control key pollen-pistil interactions in a species-specific wa...
Presentation
Small, secreted cysteine-rich proteins (CRPs) combine a highly stable cysteine spacing, ensuring conservation of their 3D structure and function, and hypervariable inter-cysteine blocks, allowing quick evolution of specific recognition domains. Interestingly, several CRPs were shown to control key pollen-pistil interactions, including self-incompa...
Poster
Full-text available
From the stigma to the ovary, small secreted proteins play pivotal roles in pollen-pistil interactions. They ensure proper pollen tube (PT) growth (germination, elongation, and guidance) and contribute to the establishment of breeding barriers through species-specific interactions. Among them, ovule-secreted proteins (OSPs) were shown to be of part...
Poster
Full-text available
Small, secreted cysteine-rich proteins (CRPs) are known to control key aspects of sexual plant reproduction such as sporophytic self-incompatibility (SCR/SP11), pollen-style interactions (SCA/LTP5, LeSTIG1), as well as pollen tube guidance (TfLUREs, AtLUREs) and reception (EC1, ZmES4) by the female gametophyte. CRPs have a dual sequence structure,...
Article
During plant sexual reproduction, continuous exchange of signals between the pollen and the pistil (stigma, style and ovary) plays important roles in pollen recognition and selection, establishing breeding barriers and, ultimately, leading to optimal seed set. After navigating through the stigma and the style, pollen tubes (PTs) reach their final d...
Presentation
Gathering 196 species, wild potatoes (Solanum sect. Petota) are a striking example of plant diversification. Although they coexist sympatrically throughout all Latin America, and have the physiological ability to hybridize with close species, they display strong reproductive isolation barriers. Experiments carried out in our laboratory show that po...
Presentation
Wild potatoes gather 196 species throughout Latin America. Although they coexist sympatrically, they exhibit strong reproductive isolation barriers. Research carried out in our laboratory showed that the pistil (plant female sexual organ) is a major player of this isolation. Indeed, pollen tubes (male gametes) growing in a pistil from a distinct sp...
Poster
Full-text available
Next-generation sequencing technologies challenge researchers with increasing amounts of data. ‘Big data’ itself becomes a biological issue! For instance, transcriptomics and proteomics now make it easy to describe the compendium of proteins expressed in a given cell or tissue. Bioinformatic tools such as the well-known programs BLAST and HMMER hav...
Article
Full-text available
Proteins defined by a key amino acid pattern are key players in the exchange of signals between bacteria, animals and plants, as well as important mediators for cell-cell communication within a single organism. Their description and characterization open the way to a better knowledge of molecular signalling in a broad range of organisms, and to pos...
Article
Full-text available
The fertilization-related kinase 1 (ScFRK1), a nuclear-localized mitogen-activated protein kinase kinase kinase (MAPKKK) from the wild potato species Solanum chacoense, belongs to a small group of pMEKKs that do not possess an extended N- or C-terminal regulatory domain. Initially selected based on its highly specific expression profile following f...
Presentation
L’isolement reproductif des 196 espèces de pommes de terre sauvages d’Amérique latine (Solanum sect. Petota) est une énigme. En effet, malgré la faiblesse apparente des barrières pré- et post-zygotiques, les espèces « pures » sont largement dominantes en nature et les hybrides restent rares. Comment résoudre ce paradoxe ? La clé du problème pourrai...
Poster
Wild potatoes (Solanum sect. Petota) gather dozens of species distributed throughout all Latin America. They share three interesting features: (i) their populations coexist in vast sympatric areas; (ii) their flowering period overlap; and (iii) most of them are physiologically able to hybridize with closely related species. Logically, hybrids shoul...
Poster
Micropylar pollen tube guidance relies on the production of female gametophyte-derived chemoattractants that steer the pollen tubes toward micropylar opening of the ovules. Previously, we have determined that mature ovules (MO) emit these guidance cues, while mutant plants bearing embryo sac-less ovules (ESO) as well as immature ovules (IO) do not....
Presentation
Sexual reproduction in flowering plants involves intimate contact and continuous interactions between male and female reproductive structures. In the stigma, pollen grains are subject to adhesion, hydration and germination steps controlled by the female tissues. Next, pollen tubes elongation in the style depends on correct nutrient supply orchestra...
Poster
Wild potatoes (Solanum sect. Petota) gather about 200 species that coexist in vast sympatric areas in Latin America. Although they can often hybridize with close relatives, “pure” species are still largely dominant in nature. Why? We hypothesize that species-specificity mechanisms act at the molecular level to favor fertilization of ovules by consp...
Presentation
Wild potatoes (Solanum sect. Petota) gather dozens of species distributed throughout all Latin America. They share three interesting features: (i) their populations coexist in vast sympatric areas; (ii) their flowering period overlap; and (iii) most of them are physiologically able to hybridize with closely related species. Logically, hybrids shoul...

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Projects

Projects (4)
Project
Developing bioinformatic tools for the detection and clustering of cysteine-rich proteins.