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Grégoire Loupit

@loupitgreg

Postdoc in plant science, Umeå Plant Science Centre, Sweden

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Posts 23.01.2025
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Latest posts by Grégoire Loupit @loupitgreg

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Ice bath before Julbord, enjoying the sun when it is still out! Perfect end of the week with this fantastic group! @siamsadoyle.bsky.social @sharmavinod.bsky.social @rahulpvnewland.bsky.social @absolutemaverick.bsky.social @lorindaloi.bsky.social @loupitgreg.bsky.social

05.12.2025 14:51 👍 15 🔁 3 💬 0 📌 1
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Graft union formation involves interactions among bud signals, carbon availability, dormancy release, wound responses and non‐self‐communication in grapevine Grafting is essential to the cultivation of many perennial fruit crops, but we have little understanding of the processes involved. Here, we identify wounding and grafting-specific gene expression an...

Graft mechanisms in perennial plants are still largely unknown and complex to study as graft union formation and spring-induced dormancy release occur in parallel. Here, we tried to dissect responses from dormancy release, wounding, bud influence, homo- and hetero-grafting.
Thanks to all coauthors!!

12.06.2025 09:17 👍 4 🔁 1 💬 0 📌 1
Identifying early metabolite markers of successful graft union formation in grapevine Abstract. Grafting is an important horticultural technique used for many crop species. However, some scion/rootstock combinations are considered as incompa

Hope this is a first step for increase plant quality and help grapevine nursery sector by using metabolomics. Happy to share our last article ! @UMREGFV @INRAE_NA_BDX @isvv_bordeaux @BdxMetabolome @univbordeaux Open access :

academic.oup.com/hr/advance-art…

01.02.2022 16:07 👍 1 🔁 0 💬 0 📌 0
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Many interesting posters in #PlantBio21! Here is a great exemple ! : Molecular characterization of grape cells in culture to carbon shortage: from metabolic responses to epigenetic regulations.

cdmcd.co/gQKj7g

22.07.2021 09:18 👍 1 🔁 0 💬 0 📌 0

The use of metabolomics for wine authenticity ? New book chapter written by Josep Valls, researcher in the Oenology research unit. Congratulations Josep ! @isvv_bordeaux @univbordeaux @BdxMetabolome @UMREGFV

authors.elsevier.com/a/1cGN0ErDqMClv

21.12.2020 18:30 👍 0 🔁 0 💬 0 📌 0
Frontiers | Identifying Molecular Markers of Successful Graft Union Formation and Compatibility Grafting is a technique used for millennia for vegetative propagation, especially in perennial fruit crops. This method, used on woody and herbaceous plants,...

Metabolite analysis and gene expression to identify graft incompatibility? Research advances and new perspectives; here is our point of view. (Lockdown has finally been useful!) @UMREGFV @isvv_bordeaux @univbordeaux @Vqualitas_es

links.email.frontiersin.org/ls/click?upn=D…

02.12.2020 18:52 👍 0 🔁 0 💬 0 📌 0
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New technologies meet horticultural skills ? At @UMREGFV, for my PhD, I use 3D printing for the production of fake scions (or fake rootstocks) to better understand the mechanisms involved in grapevine during omega grafting. @isvv_bordeaux @INRAE_NA_BDX @univbordeaux

18.05.2020 17:09 👍 1 🔁 0 💬 0 📌 0
Polyphenol Profiles of Just Pruned Grapevine Canes from Wild Vitis Accessions and Vitis vinifera Cultivars Grapevine canes are an abundant byproduct of the wine industry. The stilbene contents of Vitis vinifera cultivars have been largely studied, but little is known about the stilbene contents of wild Vitis accessions. Moreover, there have only been few studies on the quantification of other phenolic compounds in just pruned grapevine canes. In our study, we investigated the polyphenol profile of 51 genotypes belonging to 15 Vitis spp. A total of 36 polyphenols (20 stilbenes, 6 flavanols, 7 flavonols, and 3 phenolic acids) were analyzed by high-performance liquid chromatography coupled with a triple quadrupole mass spectrometer. Our results suggest that some wild Vitis accessions could be of interest in terms of the concentration of bioactive polyphenols and that flavanols contribute significantly to the antioxidant activity of grapevine cane extracts. To the best of our knowledge, this is the most exhaustive study of the polyphenolic composition of grapevine canes of wild Vitis spp.

Happy to share with you my first article during my PhD ! Thanks to all the co-authors ! @UMREGFV @isvv_bordeaux @univbordeaux Polyphenol Profiles of Just Pruned Grapevine Canes from Wild Vitis Accessions and Vitis vinifera Cultivars

pubs.acs.org/doi/10.1021/ac…

23.04.2020 10:04 👍 0 🔁 0 💬 0 📌 0