Trending
Alexandra Dallaire's Avatar

Alexandra Dallaire

@alexdallaire

Symbiotic fungi, genomes and transposons πŸ„πŸ§¬ πŸ‡¨πŸ‡¦ β†’ πŸ‡¬πŸ‡§ β†’ πŸ‡―πŸ‡΅

199
Followers
249
Following
42
Posts
19.11.2024
Joined
Posts Following

Latest posts by Alexandra Dallaire @alexdallaire

AM fungi have been associated with land plants for a long time, but it’s fair to say their lineage had an equally long evolutionary prehistory. So mysterious!

doi.org/10.64898/202...
doi.org/10.1038/s415...

13.03.2026 13:04 πŸ‘ 7 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Two studies place the split between AM fungi and other fungi between ~800 million and 1 billion years ago, far earlier than the oldest fossil evidence of AM symbiosis (~400-450 Mya), and the first land plants (~475 Mya).

13.03.2026 13:04 πŸ‘ 8 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
Post image Post image

Every year or so, the position of AM fungi in the Fungal Tree of Life seems to shift. It happened again in 2025-2026: AM fungi were reported as sister to Mucoromycotina, then as sister to Dikarya + Entorrhizomycota. One consistent takeaway, though, is the timing...

13.03.2026 13:04 πŸ‘ 11 πŸ” 8 πŸ’¬ 1 πŸ“Œ 0
Preview
Cross-kingdom RNA interference promotes arbuscular mycorrhiza development - Nature Plants The authors provide evidence that symbiotic fungi forming widespread arbuscular mycorrhiza symbioses use cross-kingdom RNA interference to silence plant genes and promote their colonization of host ro...

Wow! Here's some solid evidence that arbuscular mycorrhizal fungi use small RNAs to regulate plant gene expression. Congratulations to the teams of @carogutj.bsky.social and Arne Weiberg

doi.org/10.1038/s414...

12.03.2026 16:55 πŸ‘ 10 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Preview
Decoding the Avian Missing Gene Mystery: Dot Chromosomes Unmask Extensive Gene Loss and Novel Genetic Instability Abstract. The apparent absence of numerous conserved vertebrate genes from avian genomes has puzzled researchers for over a decade. In recent years, a subs

Hron, @dalibormiklik.bsky.social @hpaces.bsky.social et al. demonstrate that avian dot microchromosomes harbor widespread gene attrition; retained dot chromosomes genes exhibit a new form of dynamic genetic instability - sequence stuttering.

πŸ”— doi.org/10.1093/gbe/evag038

#genome #evolution #birds

09.03.2026 11:24 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1
Preview
How do RNA molecules shape genome regulation in the nervous system? (AKAY_U26CASE) | Doctoral Training Partnership This is open to Home Fee Status candidates only. This PhD project will investigate how RNA modifications influence the activity of topoisomerase I (TOP1), a crucial enzyme that regulates DNA…

PhD position in our lab - 4-year funded by BBSRC and @nrpdtp.bsky.social in collaboration with @earlhaminst.bsky.social and Inspiralis Ltd. Open to UK fee qualifying students - UK citizens and citizens of Ireland (residency requirement), etc biodtp.norwichresearchpark.ac.uk/projects/how...

06.03.2026 15:06 πŸ‘ 6 πŸ” 11 πŸ’¬ 0 πŸ“Œ 1

1/ ✨ New preprint alert ✨

It is my pleasure to share:
"Stepwise evolution of the developmental and symbiotic functions of DELLA in land plants"

Here we investigated the role of the single GRAS transcription factor DELLA in #MyMarchantia

doi.org/10.64898/202...

#PlantScience
A thread...

04.03.2026 05:20 πŸ‘ 48 πŸ” 36 πŸ’¬ 5 πŸ“Œ 2
A sedge. It may look unassuming but its genome has several unusual features.

A sedge. It may look unassuming but its genome has several unusual features.

Why do the chromosomes of cyperids (sedges & rushes) split and fuse so regularly on evolutionary timescales?

Is it because they have so many centromeres?

Our new preprint, the first major paper of my PhD, addresses this question. πŸ§΅β¬‡οΈ 1/12

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

03.03.2026 15:57 πŸ‘ 25 πŸ” 13 πŸ’¬ 1 πŸ“Œ 2
Preview
Dihydroxyhexanoic acid biosynthesis controls turgor in pathogenic fungi Many plant pathogenic fungi penetrate host surfaces mechanically, using turgor pressure generated by specialized infection cells called appressoria. These appressoria develop semipermeable cell walls ...

Out in @science.org this week, two fungal enzymes synthesise DHHA, which controls cell wall porosity and turgor in plant pathogenic fungi www.science.org/doi/10.1126/...

#mycology
#plantscience

13.02.2026 09:46 πŸ‘ 50 πŸ” 22 πŸ’¬ 0 πŸ“Œ 0
Post image Post image

When humans create an artificial island, how do fungi colonize this new habitat?

Using the Danish island Peberholm as an experimental system, a recent Fungal Ecology article examines arbuscular mycorrhizal (AM) fungal succession on new land. doi.org/10.1016/j.fu...

πŸ“· Wikipedia

04.02.2026 13:09 πŸ‘ 14 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Preview
Holes in the Hologenome: Why Host-Microbe Symbioses Are Not Holobionts | mBio ABSTRACT The advent of relatively inexpensive tools for characterizing microbial communities has led to an explosion of research exploring the diversity, ecology, and evolution of microbe-host systems...

Rereading these two papers:

Holes in the hologenome: why host-microbe symbioses are not holobionts.
journals.asm.org/doi/10.1128/...

The Hologenome Concept: Helpful or Hollow?
journals.plos.org/plosbiology/...

And I still find myself in general agreement with most of the points in them

02.02.2026 04:20 πŸ‘ 59 πŸ” 22 πŸ’¬ 2 πŸ“Œ 1

Interesting kind of genomic compartmentalisation in wheat: transposable elements are enriched around genomic regions that were under selection during domestication 🧬

31.01.2026 13:07 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

What the hell? No recombination no problem? "These findings challenge the boundary between sex and clonality, revealing a unique evolutionary strategy linking genome architecture, recombination loss, and transmission bias." www.biorxiv.org/content/10.6...

27.01.2026 17:46 πŸ‘ 21 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0

A new AMF genome is out, and it is a beauty! Congrats for putting together the monstrously big Gigaspora margarita πŸ™Œ

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

21.01.2026 14:02 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
How to lead a journal club you won’t be embarrassed by later One of the jobs facing an early-career scientist, and a developing writer, is to learn what their field’s literature looks like. One of the best tools to that end is the journal club. If you’ve nev…

It's easier to tear down than build up, and in science we have a bad case of that. So: how to lead a journal club that actually finds value in what you read. scientistseessquirre... πŸ§ͺ

13.01.2026 14:08 πŸ‘ 66 πŸ” 28 πŸ’¬ 4 πŸ“Œ 1

πŸ‘Ύ Congrats to @bbuchfink.bsky.social and @hajkdrost.bsky.social for DIAMOND dominating the annotation of fungal metagenomics data! And to authors for reporting the use of computational tools πŸ™Œ

doi.org/10.1111/nph....

14.01.2026 06:34 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image

Microbial eukaryotes keep challenging assumptions about eukaryotic cell and genome biology.

Our upcoming workshop explores the frontier of protist genomics and how it shapes cell biology, ecology and evolution.

Please save the date! Talks, posters and ECR events

Websites and details coming soon

13.12.2025 10:19 πŸ‘ 94 πŸ” 38 πŸ’¬ 1 πŸ“Œ 0
Preview
Donate to Supporting Fungal Scientists From Low-Income Countries, organized by Priscila Chaverri Fungi are essential to life on Earth, supporting food product… Priscila Chaverri needs your support for Supporting Fungal Scientists From Low-Income Countries

Hi friendsβ€”consider this πŸ‘‡
Let’s work together to bring amazing mycologists together in South Korea in 2027!

gofund.me/5cc978d4d

31.12.2025 15:07 πŸ‘ 8 πŸ” 4 πŸ’¬ 2 πŸ“Œ 2
Preview
An open letter to graduate students and other procrastinators: it’s time to write - Nature Biotechnology Nature Biotechnology - An open letter to graduate students and other procrastinators: it’s time to write

"The only kind of thinking that matters in science is structured thinking. The only way to give structure and substance to your thoughts is to write them down. Writing. Is. Thinking."

Thinking about this in the context of AI tools....

25.03.2025 14:46 πŸ‘ 75 πŸ” 33 πŸ’¬ 4 πŸ“Œ 3
Call for Letters of Intent - HFSP Research Grants 2027

Call for Letters of Intent - HFSP Research Grants 2027

Attention scientists from all over the worldπŸ™ƒ
The Call for Letters of Intent for #HFSPResearchGrants 2027 is now open! πŸ§ͺ
Get your international & interdisciplinary team. It's time to put your bold research idea into practice!
πŸ”—https://bit.ly/48VsGCG
πŸ“… 15 Dec 2025–26 Mar 2026
#sts #LifeSciences

15.12.2025 14:52 πŸ‘ 34 πŸ” 22 πŸ’¬ 0 πŸ“Œ 4

🌱 Why mutate when you can epimutate? A nice perspective on plants by @thanvisrikant.bsky.social & @hajkdrost.bsky.social

12.12.2025 12:17 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Absolutely gorgeous microscopy and time-lapse imaging on this plant-mutualist-pathogen system! Insane in the membrane 🎢 Well done @alexguyon.bsky.social @dromius.bsky.social and colleagues!

11.12.2025 17:56 πŸ‘ 10 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
Preview
Jeff Bezos Creates A.I. Start-Up Where He Will Be Co-Chief Executive

In applying AI to material science, biology, etc, capitalism is trying to shed science.

The point is to substitute the engineering of a machine that can generate what science has hitherto done, but without having people know things. Knowledge ultimately residing in private property is the dream.

17.11.2025 15:12 πŸ‘ 430 πŸ” 175 πŸ’¬ 8 πŸ“Œ 22
Preview
A phase oscillator model of cell cycles reveals nuclear density control in a branched fungal network Multinucleate cells are widespread in biology, from human skeletal muscle and placenta to many filamentous fungi, yet their basic cell biology remains poorly understood. Maintaining an appropriate nuc...

A phase oscillator model of cell cycles reveals nuclear density control in a branched fungal network
doi.org/10.1101/2025...

08.12.2025 20:37 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Dated gene duplications elucidate the evolutionary assembly of eukaryotes - Nature Analysis of eukaryotic gene sequences using a relaxed molecular clock methodology indicate that eukaryotes emerged 3.0–2.25 billion years ago as a result of mitochondrial endosymbiosis with complex ar...

Dated gene duplications elucidate the evolutionary assembly of eukaryotes www.nature.com/articles/s41... #jcampubs

03.12.2025 23:09 πŸ‘ 17 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Congratulations Nick!! πŸŽ‰

27.11.2025 13:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It’s French from 400 years ago heh πŸ€·β€β™€οΈπŸ˜Š

20.11.2025 14:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
How parasitic plants avoid being parasitized | Plantae It’s not too difficult to envision how a plant recognizes something very different from itself, like a bacterium, oomycete, or fungus. It’s a bit less obvious how a plant recognizes another plant as…

Plant Science Research Weekly -- How parasitic plants avoid being parasitized (Science) @shirasulab.bsky.social (Summary by Mary Williams @PlantTeaching.bsky.social) buff.ly/KEgzFe5

#PlantaePSRW

17.11.2025 20:15 πŸ‘ 6 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Video thumbnail

New light on old stones: a fossil #fungus in #symbiosis with one of the oldest known land plants

@chistinesd.bsky.social, et al.

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

@dromius.bsky.social @ffercoq.bsky.social #PlantScience

Summary also available in French and Spanish.

14.11.2025 07:35 πŸ‘ 23 πŸ” 19 πŸ’¬ 1 πŸ“Œ 0
Post image Post image Post image

πŸ”₯ At conferences, who asks the questions shapes who gets seen. Across 24 ID&CM meetings, women were 55% of delegates but asked 36% of questions.
πŸ’¬ When women moderate or speak first, others follow.
Let’s change the pattern

bit.ly/47VL0eH
πŸ™ @maudsalmona.bsky.social & MicroID EmpowHERment consortium

13.11.2025 09:48 πŸ‘ 16 πŸ” 12 πŸ’¬ 0 πŸ“Œ 1