Deadline soon! Registration is now FREE for graduate students and postdocs for the 14th Annual Yosemite Symbiosis workshop. THANKS to the Gordon and Betty Moore Foundation! Space is limited. Learn more and REGISTER here
snri.ucmerced.edu/form/symbios...
We've upgraded to a new conference location!
05.03.2026 01:45
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Genomics of adaptation to extreme thermal environments
As climate change continues to influence ecosystems around the globe, understanding the genomics of adaptation to hot and cold environments is becoming ...
Calling all researchers working on *Genomics of Adaptation to Extreme Thermal Environments*
I'm serving as a guest editor of an upcoming collection in BMC Genomics and am eager to read your submission! More on scope and how to contribute here: bit.ly/4kH3PIx π§ͺ @springer.springernature.com
24.02.2026 19:10
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How specific are heritable symbioses?
And what can we learn from swapping obligate symbionts across host species?
We address this in our latest, led by @inespons.bsky.social & in our collaboration w/ @microbiome.bsky.social π¦ πͺ² Out today in @natcomms.nature.com!
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www.nature.com/articles/s41...
16.02.2026 07:24
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The visualization of two bacterial genomes, of 50 and 52kb, representing independent instances of extreme genomic reduction in ancient heritable endosymbionts of planthoppers.
Our new paper in @natcomms.nature.com is now online-early!
We describe independent evolution of bacterial genomes of only ~50β52 kb β the smallest known outside cellular organelles β revealing striking convergence toward minimal gene sets.
π doi.org/10.1038/s414...
11.02.2026 11:15
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NEW: Registration is now FREE for graduate students and postdocs for the 14th Annual Yosemite Symbiosis workshop. THANKS to the Gordon and Betty Moore Foundation! Space is limited. Learn more and REGISTER here: snri.ucmerced.edu/form/symbios...
08.02.2026 17:29
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Please join the @symbiosisalumni.bsky.social during our next Alumni Network seminar to learn about the origin and complexities of mealybug endosymbioses from @filiphusnik.bsky.social:
ποΈ February 25th
π₯ 8am WET
πon zoom (PM for link)
symbnet.bsky.social
moorefound.bsky.social
mblscience.bsky.social
05.02.2026 09:49
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Had a blast nerding out about beetles (& The Beatles) on Switzerlandβs daily news program/Tagesschau πͺ²
Thankful for the chance to wax lyrical about our favorite bugs at the Aha Festival, and with the wonderful folks of Lucerne π¨π
04.02.2026 20:21
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Thanks! π³
02.02.2026 05:13
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*correct link
Very excited to share a preprint from stellar lab postdoc, Dr. Younghwan Kwak.
βIntrahost mutational dynamics parallel long-term genome evolution in endosymbiontsβ
Cool, skillful work and a nifty story!
#symbiosis #insects #evolution
www.biorxiv.org/content/10.6...
02.02.2026 05:11
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Very excited to share a preprint from stellar lab postdoc, Dr. Younghwan Kwak.
βIntrahost mutational dynamics parallel long-term genome evolution in endosymbiontsβ
Cool, skillful work and a nifty story!
#symbiosis #insects #evolution
www.biorxiv.org/content/10.6...
02.02.2026 03:10
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Phenotypic divergence is driven by mobile genetic elements in a heritable insect symbiont
Heritable microbes profoundly influence insect biology, yet the traits they confer often evolve rapidly and differ among closely related symbiont strains. Despite their importance, we lack a clear understanding of how novel traits arise in symbiosis and how this diversity influences host ecology in natural populations. The aphid facultative symbiont Regiella insecticola is ideally suited to this question because of its strong lineage-specific variation in host benefits. By generating 20 high-quality genomes, we found that Regiella βs evolution is driven largely by gene gains mediated by mobile genetic elements. We identified a plasmid (pRILSR1) that encodes a type IV secretion system and a highly expressed predicted effector that has been convergently acquired by Regiella strains from pea aphids. Notably, only pRILSR1-bearing strains confer protection against the specialist fungal pathogen Pandora neoaphidis , indicating that gains and losses of the plasmid underlie the evolution of this key defensive phenotype. Using a multi-year field study, we further show that the pRILSR1 plasmid is strongly associated with Regiella found in pea aphid populations adapted to specific host plants, driving variation in symbiont-mediated defense across populations. Together, our results show that mobile genetic elements generate key adaptive traits in microbial symbionts and, in doing so, drive phenotypic divergence among host populations. ### Competing Interest Statement The authors have declared no competing interest.
New preprint! Symbionts provide critical functionsβbut how do they impact host phenotypes in nature? We show a horizontally transferred plasmid in a heritable symbiont drives divergence in defensive traits across insect populations, revealing how mobile DNA rapidly shapes pathogen resistance. π
28.01.2026 15:41
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Characterizing a Novel Symbiopectobacterium purcellii MEX Strain at the Early Stages of Establishing a Symbiotic Relationship
Abstract. Insects ally with microbial symbionts for a diversity of services. The range of these interactions is wide, spanning from beneficial to pathogeni
Gunasekaran, Sicard, Almeida & @symboevo.bsky.social report a novel symbiotic interaction between a leafhopper and a bacterium; they analyse the genome of the bacterium, inferring it is in the early stages of establishing a host-dependent symbiosis.
π doi.org/10.1093/gbe/...
#genome #evolution
20.01.2026 10:36
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Lophophytum pyramidale. Photo credit: M. Virginia Sanchez Puerta
Happy to share this work with Virginia Sanchez-Puerta (not on bsky) and colleagues on how loss of photosynthesis in these (strange!) plants affects translation and tRNAs in plastids and mitochondria....
www.biorxiv.org/content/10.6...
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13.01.2026 04:45
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