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Gordon Bennett

@symboevo

Study of insects, symbionts, evolution, etc. Parent, educator, and other things.

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Latest posts by Gordon Bennett @symboevo

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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 πŸ‘ 13 πŸ” 7 πŸ’¬ 2 πŸ“Œ 1
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How a tiny bacterium turns itself into a β€œtunneling machine” Some symbiotic bacteria can invade micron-scale host passages by wrapping their flagella around themselves and moving like a tunneling machine. Our study reveals how this clever motion enables them to overcome extreme confinement and successfully colonize their hosts.

How a tiny bacterium turns itself into a β€œtunneling machine”

http://dlvr.it/TRGZ7c

http://dlvr.it/TRGZ7k

03.03.2026 15:15 πŸ‘ 10 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
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 πŸ§ͺ @springer.springernature.com

24.02.2026 19:10 πŸ‘ 12 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
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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 🦠πŸͺ² Out today in @natcomms.nature.com!

1/n
www.nature.com/articles/s41...

16.02.2026 07:24 πŸ‘ 115 πŸ” 70 πŸ’¬ 3 πŸ“Œ 3
The visualization of two bacterial genomes, of 50 and 52kb, representing independent instances of extreme genomic reduction in ancient heritable endosymbionts of planthoppers.

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 ~50–52 kb β€” the smallest known outside cellular organelles β€” revealing striking convergence toward minimal gene sets.

πŸ”— doi.org/10.1038/s414...

11.02.2026 11:15 πŸ‘ 79 πŸ” 29 πŸ’¬ 5 πŸ“Œ 6
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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 πŸ‘ 16 πŸ” 13 πŸ’¬ 0 πŸ“Œ 0
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Symbiotic entrenchment through ecological Catch-22 A symbiotic rove beetle develops a stealth phenotype by silencing production of its hydrocarbon pheromones, enabling it to infiltrate ant colonies, steal ant pheromones, and achieve social acceptance ...

www.cell.com/cell/abstrac...

07.02.2026 18:05 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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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:

πŸ—“οΈ February 25th
πŸ•₯ 8am WET
πŸ“on zoom (PM for link)

symbnet.bsky.social
moorefound.bsky.social
mblscience.bsky.social

05.02.2026 09:49 πŸ‘ 9 πŸ” 4 πŸ’¬ 1 πŸ“Œ 1
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Had a blast nerding out about beetles (& The Beatles) on Switzerland’s daily news program/Tagesschau πŸͺ²

Thankful for the chance to wax lyrical about our favorite bugs at the Aha Festival, and with the wonderful folks of Lucerne πŸ‡¨πŸ‡­

04.02.2026 20:21 πŸ‘ 31 πŸ” 6 πŸ’¬ 2 πŸ“Œ 0
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Plant Pathogens Moonlighting as Beneficial Insect Symbionts Herbivorous insects can shape the epidemiology of disease in plants by vectoring numerous phytopathogens. While the consequences of infection are often well-characterized in the host plant, the extent...

Can plant pathogens boost vector fitness?

Together with @hassansalem.bsky.social, we review how phytopathogens can spread further by moonlighting as insect symbionts πŸͺ² More on this nifty lifestyle in @annualreviews.bsky.social!

www.annualreviews.org/content/jour...

02.02.2026 07:48 πŸ‘ 40 πŸ” 28 πŸ’¬ 1 πŸ“Œ 1

Thanks! 😳

02.02.2026 05:13 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

*correct link
Very excited to share a preprint from stellar lab postdoc, Dr. Younghwan Kwak.

β€œIntrahost mutational dynamics parallel long-term genome evolution in endosymbionts”

Cool, skillful work and a nifty story!
#symbiosis #insects #evolution

www.biorxiv.org/content/10.6...

02.02.2026 05:11 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Very excited to share a preprint from stellar lab postdoc, Dr. Younghwan Kwak.

β€œIntrahost mutational dynamics parallel long-term genome evolution in endosymbionts”

Cool, skillful work and a nifty story!
#symbiosis #insects #evolution

www.biorxiv.org/content/10.6...

02.02.2026 03:10 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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 ’s 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 functionsβ€”but 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. πŸ‘‡

28.01.2026 15:41 πŸ‘ 7 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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Hidden genetic diversity among Blochmanniella endosymbionts of closely related carpenter ant populations Abstract. Carpenter ants (Family Formicidae; Genus Camponotus) are a globally distributed, arboreal clade. They harbor an intracellular obligate bacterial

A little late due to re-establishing a Bluesky presence… but! here is another recent pub from a terrific and talented grad student.

A fun project from a beautiful place. Love (y)our National Parks! #nationaparks #symbiosis #insects

academic.oup.com/jeb/article/...

20.01.2026 18:49 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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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.

πŸ”— doi.org/10.1093/gbe/...

#genome #evolution

20.01.2026 10:36 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Lophophytum pyramidale. Photo credit: M. Virginia Sanchez Puerta

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...

1/n

13.01.2026 04:45 πŸ‘ 38 πŸ” 17 πŸ’¬ 2 πŸ“Œ 1
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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

I’m excited to share a new paper by a super talented graduate-student-now-postdoc. Grateful to work with old and new collaborators!

Characterizing a novel Symbiopectobacterium MEX strain at the early stages of establishing a symbiotic relationship url: academic.oup.com/gbe/article/...

09.01.2026 21:36 πŸ‘ 10 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0