Mélanie Rich 🌱🍄
@melaniekrich.bsky.social
200 followers 340 following 14 posts
#Evolution #Mycorrhiza Eco-anxious
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Reposted by Mélanie Rich 🌱🍄
baptistebio.bsky.social
Exploring fern pathosystems and immune receptors to bridge gaps in plant immunity - BMC Biology
Land plants include angiosperms, gymnosperms, bryophytes, lycophytes, and ferns, each of which may deploy distinct strategies to resist pathogens. Here, we investigate fern-pathogen interactions by characterizing novel pathosystems and analyzing the diversity of fern immune receptors. A collection of fern species was inoculated with a diverse set of filamentous microbes, and disease symptoms were assessed. We further leveraged published genome mining tools to analyse the diversity of receptor-like kinases, receptor-like proteins (RLKs/RLPs) and nucleotide-binding and leucine-rich repeats (NLRs), along with key immune signalling components, in ferns. Our results reveal that ferns exhibit a range of responses to pathogens, including putative non-host resistance and more specific resistance mechanisms. Among ten ferns tested, Pteris vittata displays the broadest spectrum of pathogen compatibility. Genome mining indicates that ferns encode a diverse repertoire of putative immune receptors, antimicrobial peptides, and mediators of systemic acquired resistance. Ferns possess numerous RLKs/RLPs, resembling those required for cell-surface immunity in angiosperms. They also encode diverse NLRs, including sub-families lost in flowering plants. These findings provide insights into disease resistance evolution and open promising perspectives for crop protection strategies.
bmcbiol.biomedcentral.com
Reposted by Mélanie Rich 🌱🍄
nancy-choudhary.bsky.social
Have you ever wondered why pumpkins are never purple or blue like other plants? 🎃🌈

While most plants can produce pink, blue, and purple pigments (thanks to anthocyanins), the Cucurbitaceae family 🍈 🍉 🥒have lost all the pathway genes to produce these pigments.
🔗 doi.org/10.1101/2025...
Reposted by Mélanie Rich 🌱🍄
pierremarcdelaux.bsky.social
A first dive in fern x pathogen interaction! More to come!

Congratulations @baptistebio.bsky.social @jacquet-chris.bsky.social et al.!
jacquet-chris.bsky.social
Want to see ferns under attack and how they respond to pathogens? Check out our latest paper!
doi.org/10.1186/s129...
Congrats on this huge team effort to @baptistebio.bsky.social @madeleinebaker.bsky.social @kellerjeanphd.bsky.social @maximebonhomme.bsky.social @pierremarcdelaux.bsky.social
Various ferns species inoculated with S. sclerotiorum.
Reposted by Mélanie Rich 🌱🍄
jacquet-chris.bsky.social
Want to see ferns under attack and how they respond to pathogens? Check out our latest paper!
doi.org/10.1186/s129...
Congrats on this huge team effort to @baptistebio.bsky.social @madeleinebaker.bsky.social @kellerjeanphd.bsky.social @maximebonhomme.bsky.social @pierremarcdelaux.bsky.social
Various ferns species inoculated with S. sclerotiorum.
melaniekrich.bsky.social
This was indeed a fun read! Nothing makes you feel stupid as much as trying to read a paper out of your scope of knowledge
Reposted by Mélanie Rich 🌱🍄
malick-mbengue.bsky.social
I wished I could have written something like this. Rude, fun and meaningful.
static1.squarespace.com/static/686d9...
static1.squarespace.com
Reposted by Mélanie Rich 🌱🍄
jennifermach.bsky.social
Thank you for the 🧵 ! Tagging for the #PlantScience feed!
Reposted by Mélanie Rich 🌱🍄
spun.earth
What Everyone Should Know About Fungi by Age 15

5️⃣ Mycorrhizal fungi are often first responders post wildfires, droughts, and human disturbances, helping plants regenerate, rebuild root systems & reestablish nutrient pathways.

See the top 10 list (buff.ly/nMNaB60) and follow for new fungal facts.
Reposted by Mélanie Rich 🌱🍄
melaniekrich.bsky.social
Together with new data in RNS from our colleagues @nikolajabel.bsky.social et al. doi.org/10.1101/2025..., we hope close the gap in our understanding of the common symbiosis pathway for plant endosymbioses! 7/7
Schematic representation of the Common Symbiosis Pathway. The plasma membrane receptor SYMRK phosphorylates EPP1, this leads to a calcium spiking activation of the kinase CCaMK that in turn phosphorylates the transcription factor CYCLOPS to activate the symbiotic program
melaniekrich.bsky.social
We propose that EPP1 has been a core component of AMS signaling since the origin of land plants as we know them 🌱🍄 6/7
doi.org
melaniekrich.bsky.social
Here we show abolition of AMS in epp1 mutants in the flowering plant Petunia and in the liverwort Marchantia. We also find that EPP1 is directly phosphorylated by the SYMRK receptor and that the epp1 phenotype can be complemented by an autoactive version of the kinase CCaMK 5/7
melaniekrich.bsky.social
Knowing EPP1 belongs to the short list of genes conserved across land plants in species with the ability to form endosymbiosis and convergently lost in the ones having lost this ability, we decided switch model plants to test the function of EPP1 in Arbuscular Mycorrhiza Symbiosis (AMS). 4/7
Reposted by Mélanie Rich 🌱🍄
nikolajabel.bsky.social
Our findings suggest that EPP1 serves as a key molecular bridge between plasma membrane signaling and downstream responses doing root nodule symbiosis, helping to close a long-standing gap in the field.
Congratulations to everyone involved in this work!
Reposted by Mélanie Rich 🌱🍄
jonathanslaght.com
super cool study found human artifacts in Bearded vulture nests, incl. "weaponry like a crossbow bolt and wooden lance, decorated sheep leather, and parts of a slingshot....a shoe made from twigs and grass is ~675-years-old." link to paper: doi.org/10.1002/ecy..... www.popsci.com/environment/... 🧪🌍🦉
Multi-generational vulture nests hold 700 years of human artifacts
Crossbow bolts, sandals, slingshots, and more.
www.popsci.com