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Natalia Guayazán Palacios @nataliagupa.bsky.social · 20d

The work from my MSc with @silviarestrepo in collaboration with @dromius.bsky.social is finally out. We used an integrative approach to follow Phytophthora betacei along while infecting tree tomato. This was in my back burner during my Ph.D, and it materialized thanks to @epiplantpath.bsky.social 🥳

bioRxiv Plant Bio @biorxiv-plants.bsky.social · 21d

Microscopical and molecular characterization of the infection cycle of Phytophthora betacei during disease development on tree tomato (Solanum betaceum). https://www.biorxiv.org/content/10.1101/2025.09.11.675658v1

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Reposted by Natalia Guayazán Palacios

bioRxiv Plant Bio @biorxiv-plants.bsky.social · 21d

Microscopical and molecular characterization of the infection cycle of Phytophthora betacei during disease development on tree tomato (Solanum betaceum). https://www.biorxiv.org/content/10.1101/2025.09.11.675658v1

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Reposted by Natalia Guayazán Palacios

Adam Steinbrenner @adsteinbrenner.bsky.social · Sep 5

More fruits of studying natural variation in common bean (Phaseolus vulgaris): an interesting genetic basis for insensitivity to caterpillars' In11 elicitor 🐛

Our new bioRxiv preprint from star technicians Brian Behnken and Wesley George below 🧵

www.biorxiv.org/content/10.1...

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 2

Thanks, Sagar! I'm looking forward to the fall!

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

I am incredibly proud of this work that was the result of collaborative science with chemical ecology experts Betty Benrey and Ted Turlings at @UniNeuchatel!

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

5. We conclude that INR is required for the emission of In11-induced volatile blends that attract natural predators to plants experiencing herbivory!

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

4. And the crown jewel: We took our NILs to a field in Mexico where we observed a 40% reduction in wasp attacks to caterpillars pinned to inr-1/inr-1 lines in an In11-specific manner.

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

3. We generated common bean near-isogenic lines with INR/INR or inr-1/inr-1 genotypes and demonstrated reduced direct antiherbivore defenses .

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

2. We leveraged natural variation in response to the HAMP inceptin (In11) in common bean to identify a non-responsive landrace with a L.O.F deletion in the INR gene that we termed inr-1.

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Aug 1

I am thrilled to share the 2nd chapter of my PhD with @adsteinbrenner.bsky.social In collaboration with @tiszapatrick we demonstrated that the LRR-RLP INR is the missing molecular link between caterpillar recognition and predatory wasp recruitment in the field. A thread 1/6

bioRxiv Plant Bio @biorxiv-plants.bsky.social · Aug 1

A plant immune receptor mediates tritrophic interactions by linking caterpillar detection to predator recruitment https://www.biorxiv.org/content/10.1101/2025.07.29.667524v1

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Reposted by Natalia Guayazán Palacios

Maria Mineiro @mariamnro.bsky.social · Jul 27

How do plants detect insect eggs ? 🌱🦋
Our new paper on GLR2.7 and its role in plant defense responses to insect eggs is now out in @newphyt.bsky.social
Big thanks to the Reymond Lab @unil.bsky.social and our collaborators !

nph.onlinelibrary.wiley.com/doi/10.1111/...

The glutamate receptor‐like GLR2.7 modulates insect egg‐induced defense responses in Arabidopsis

Upon perception of insect eggs, Arabidopsis thaliana activates a generic immune response that culminates in cell death (hypersensitive-like response (HR-like)). While this response can subsequently .....

nph.onlinelibrary.wiley.com

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

This will be my closing post for this #2025ISMPMI series. If you're a society member, you have access to ISMPMI rewind and can watch any talk the speaker agreed to have recorded. See you in Jeju, Korea in 2027!

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Reposted by Natalia Guayazán Palacios

Adam Steinbrenner @adsteinbrenner.bsky.social · Jul 17

First, work from Chang-Bao Li and Chuanyou Li (Shandong Ag U) on regulation of SYR1 receptor.

The paralog SYR2 is an induced negative regulator w/ lower binding affinity.

@nataliagupa.bsky.social highlighted that the module is only found in Solanoideae

www.sciencedirect.com/science/arti...

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

Also unpublished single nuclei and spacial transcriptomics data showing cool candidate genes important for the interaction!

Reposted by Natalia Guayazán Palacios

Adam Steinbrenner @adsteinbrenner.bsky.social · Jul 17

We recently wrote two Preview articles of exciting MPMI papers in Mol Cell and Dev Cell.

Two surprising cases showing different ways to regulate immune receptors in plants -- the cell surface LRR-RK, SYR1 and the intracellular NLR DM2

Short summaries below 🧵🌱 #2025ISMPMI

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

Maria Harris closing #2025ISMPMI with the "most important plant-microbe interaction on earth".
CKL1 and CKL2 kinanses locate to the periarbuscular and plasma membranes during AMF symbiosis and their kinase activity is key for regulating downstream lipid biosynthesis.

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Reposted by Natalia Guayazán Palacios

Morgan Carter @morgancarterphd.bsky.social · Jul 17

@cornepieterse.bsky.social shows off the incredible automated growth and phenotyping setup with the Hades in vitro root system which “loves microbes”. Incredible throughput.

Link: www.npec.nl/phenotyping-...

#2025ISMPMI

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Reposted by Natalia Guayazán Palacios

Debangana Moitra @debanganamoitra.bsky.social · Jul 17

Stunning talk by Dr. Stella Cesari (PHIM, Univ. Montpellier):
MAX effectors—structurally conserved but sequentially diverse.
Beyond HIPPs, AVR-Pib hits MAPKKKs—key players in plant immunity.

One fold, many targets?

#ISMPMI2025 #MAXeffectors #MAPKKK #PlantImmunity
@cbsmontpellier.bsky.social

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Reposted by Natalia Guayazán Palacios

Armin Djamei @effectomics.bsky.social · Jul 17

#2025ISMPMI Benjamin Menn presents an elegant yeast surface displace screen to identify new carbohydrate binding receptors of plants.

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Reposted by Natalia Guayazán Palacios

Morgan Carter @morgancarterphd.bsky.social · Jul 17

Luis Rubio moves us from thinking about engineering against pathogens to engineering for nitrogen fixation.

They moved Nif genes into yeast mitochondria! But can this work in plants? Insolubiluty is the issue.

Screened variants by expressing in N benth - found one. Works in rice too!
#2025ISMPMI

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

"LRRs are slinkys, and slinkys are circles" Thank you math! #2025ISMPMI

Morgan Carter @morgancarterphd.bsky.social · Jul 17

Excellent prop work from @kseniakrasileva.bsky.social who brings out a slinky to explain leucine rich repeat regions of proteins.
#2025ISMPMI

Ksenia at a lectern holding a rainbow slinky and pointing

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Reposted by Natalia Guayazán Palacios

Armin Djamei @effectomics.bsky.social · Jul 17

#2025ISMPMI Aurelie Rakotondrafara shows very interesting effects of mycovirus infection of Sclerotinia on virulence on the host plant. Take home to use mycoviruses and plant viruses to limit the spread of fungal pathogens.

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

Po-Yuan Shih on aphid salivary protein Ap4 targeting PsBPL1/2 to increase aphid fecundity on a biotype-specific manner. She also highlights the pain of transient expression on legumes and using our well established N. bethamiana system to get at some mechanism #2025ISMPMI

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Reposted by Natalia Guayazán Palacios

Morgan Carter @morgancarterphd.bsky.social · Jul 17

Evans Lagudah taking a global perspective on improving wheat, highlighting CIMMYT’s phenotyping network for wheat.

He calls for the community to use MPMI knowledge more directly to improve crop outcomes.
#2025ISMPMI

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Natalia Guayazán Palacios @nataliagupa.bsky.social · Jul 17

Last day of #2025ISMPMI begins with Renier van der Hoorn and the amazing work on glycosirin, a bacterial inhibitor of BGAL1 that acts to manipulate plant glycobiology at the apoplast to evade recognition!

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