#Trebouxia
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newphyt.bsky.social
Chromosome‐level #genome assembly of the #photobiont microalga Trebouxia sp. ‘A48’ from the #lichen Xanthoria parietina

📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
by Tagirdzhanova et al.

@metalichen.bsky.social @talbotlabtsl.bsky.social @WileyPlantSci
Trebouxia sp. ‘A48’.
November 11, 2025 at 11:17 PM
talbotlabtsl.bsky.social
New paper led by @metalichen.bsky.social from our group presenting a chromosome-level assembly of the Trebouxia photobiont alga from the lichen Xanthoria parietina - a resource we hope will enable significant new insight into the symbiosis @newphyt.bsky.social doi.org/10.1111/nph....
November 12, 2025 at 4:29 PM
ioanabrannstrom.bsky.social
Proud of my PhD student Beatrice Bylén who did a great job in presenting #Thamnolia phylogeography and #photobiont community inside.
#IAL10
#lichens #Trebouxia
July 30, 2026 at 1:18 PM
genomebiolevol.bsky.social
Wong, Otte & Schmitt present over 30 new chloroplast and mitochondrial genomes of Trebouxia species, extracted from PacBio metagenomes of diverse Umbilicaria lichens from multiple climate zones.

🔗 doi.org/10.1093/gbe/evag129

#genome #evolution
GBE | Chloroplast and Mitochondrial Genomes of the Lichen-Symbiotic Green Alga Trebouxia Illuminate Evolutionary Relationships and Climate Associations and Yield New Phylogenetic Markers Microscopic view of Trebouxia, the green algal partner (photobiont) isolated and cultured from an Umbilicaria lichen.
June 22, 2026 at 12:21 PM
stevieparsons.bsky.social
Some nice close-ups of that beautiful green Xanthoria parietina. On a wet and shady stile in Dorset. #lichen
Usually bright yellow, appears green in shady conditions because it reduces production of its yellow UV-protective pigment (parietin), allowing its green algal partner (Trebouxia) to show through.
January 17, 2026 at 7:29 PM
metalichen.bsky.social
We compared the genome to another high-quality assembly of Trebouxia made by the Aquatic Symbiosis Genomics project (who btw are releasing very nice genomes from various lichens!) 3/5
top diagram shows alignment between two genomes: Trebouxia sp A48 and Trebouxia SL000003. In almost all cases, the two genomes align neatly and one contig in one assembly corresponds to one contig in the other assembly. The bottom diagram shows an upset plot for 8 Trebouxia genomes, including the two mentioned above.
May 19, 2025 at 11:34 AM
stevieparsons.bsky.social
Xanthoria parietina, usually bright yellow, appears green in shady conditions because it reduces production of its yellow UV-protective pigment (parietin), allowing its green algal partner (Trebouxia) to show through. On a wet stile in Dorset. #lichen
January 17, 2026 at 7:23 PM
ioanabrannstrom.bsky.social
After 3 months on and Erasmus scholarship Veronika Veselá will go home to her host institution Charles University in Prague.
She did such an amazing job in assembling 11 genomes of Trebouxia and Asterochlorix and creating high quality assemblies based on long reads.

We will miss you Veronika!
June 12, 2026 at 4:51 PM
metalichen.bsky.social
⚡ Attn anyone interested in algal genomics and lichen symbiosis! ⚡ New preprint: a near chromosome-level assembly of Trebouxia sp. A48 (member of T. decolorans species complex), the photobiont of Xanthoria parietina. 1/5 #lichen #alga #genomics
www.biorxiv.org/content/10.1...
the top half shows two panels with microscopy images. Left is a light-microscopy image of a group of algal cells. The cells are round with different sizes. Two arrows point at sporangia: one looks as if someone stuffed 8 footballs in a thin elastic bag. The other is perfectly round and contains many small spores within. The right panel shows the same group of cells, but in fluorescent microscopy, where green color shows chloroplasts. In each cell the chloroplasts are globular with small lobes sticking out. The bottom half shows a photo of Xanthoria lichen - bright yellow and leafy growing on a tree branch
May 19, 2025 at 11:34 AM
metalichen.bsky.social
Our paper on the #genome of the Trebouxia #photobiont from Xanthoria is now out in @newphyt.bsky.social! Check below for a near-chromosome level assembly, secretome analysis, evidence of ancient HGT, and transcriptomic comparison of the alga in symbiosis and in pure culture
doi.org/10.1111/nph.70728
the top half shows two panels with microscopy images. Left is a light-microscopy image of a group of algal cells. The cells are round with different sizes. Two arrows point at sporangia: one looks as if someone stuffed 8 footballs in a thin elastic bag. The other is perfectly round and contains many small spores within. The right panel shows the same group of cells, but in fluorescent microscopy, where green color shows chloroplasts. In each cell the chloroplasts are globular with small lobes sticking out. The bottom half shows a photo of Xanthoria lichen - bright yellow and leafy growing on a tree branch
November 12, 2025 at 3:46 PM
iicg-urjc.bsky.social
📰Raquel Pino Bodas, IICG researcher, is co-author of the new article "Hidden Strategies Beneath a Single Nucleotide: Contrasting Physiology in Lichen Photobiont Strains", published in Plant, Cell & Environment.

👀Read it here👇
onlinelibrary.wiley.com/doi/10.1111/...
Hidden Strategies Beneath a Single Nucleotide: Contrasting Physiology in Lichen Photobiont Strains
• Two closely related strains of Trebouxia lynniae exhibit contrasting ecophysiological and metabolic strategies, demonstrating how fine-scale genetic variation can drive functional diversification...
onlinelibrary.wiley.com
October 1, 2026 at 12:26 PM
metalichen.bsky.social
Salvador Chiva reports the diversity of photobionts in Xanthoria parietina and how their ecological preferences affect the distribution of the lichen. Read more here: dx.doi.org/10.1111/1462...
#IAL10
Symbiotic Versatility in Action: <fi>Trebouxia</fi> Diversity Expands the Niche of the Lichen <fi>Xanthoria parietina</fi>
Xanthoria parietina associates with an unexpectedly high diversity of Trebouxia phycobionts within clade A across the Mediterranean Basin. Climatic niche modelling reveals that differences in photobi....
dx.doi.org
July 28, 2026 at 8:18 AM
drhoz.bsky.social
The photobiont is usually a green alga in Trebouxia or Asterochloris, but P. crustulata uses Chlorella.

Purakaunui Falls, Aotearoa New Zealand.
August 3, 2026 at 12:10 PM
esedia.bsky.social
29) Green algae Trebouxia is a common lichen component; it doesn’t reproduce sexually. It produces zoospores that can migrate within a lichen
August 16, 2025 at 7:58 PM
botsocamerica.bsky.social
Eco-phylogenetic study of #Trebouxia in southern Africa reveals interbiome connectivity & potential endemism in a green algal #lichen photobiont

New #AJB research by Ian Medeiros, Alicia Ibáñez, A. Elizabeth Arnold et al.

doi.org/10.1002/ajb2... #botany #algae
Map of study sites in Africa. Biomes sampled in this study are shown on the map; other biomes and areas outside South Africa, Namibia, Lesotho (LES), and Eswatini (SWZ) are in gray. The Greater Cape Floristic Region (GCFR) is approximately equivalent to the extent of the fynbos and succulent karoo biomes.
December 6, 2024 at 2:30 PM
sim-elliott.bsky.social
3/4 In recent genomic studies the photobiont has been identified as as Asterochloris sp. of the Trebouxia group of green symbiotic alga. Cladonia rangiformis produces mats of "lichen heath" at several of Sussex's areas of vegetated shingle - this specimen was at Tide Mills Newhaven, East Sussex
September 4, 2026 at 10:13 PM
peterbraubach.bsky.social
As promised I took a small sample form the emerald green material on the poplar trunk for microscopy. I missed my post yesterday evening (too tired) - but here it is.
The emerald green stuff is... stuff. I guess some pigment?

Also some green algae present (Trebouxia sp.?).
microscopy image with green algae and fragments of emerald green material. Microscopy image with green material lit up against dark background during observation with crossed polarizers. Detail of green material.
March 26, 2024 at 7:54 AM
plantsciencedbg.bsky.social
Phykologen haben Trebouxia zur Alge des Jahres 2026 gekürt: Patrick Jung @selectedplants.bsky.social von der HS Kaiserslautern erforscht, wie sie dabei hilft, als verborgener Partner seit Jahrmillionen lebensfeindliche Gegenden unserer Erde zu besiedeln www.dbg-phykologie.de/alge-des-jah...
Alge des Jahres 2026: Trebouxia
Alge des Jahres 2026: Trebouxia - Kraftwerk der Flechten und Spezialistin für extreme Lebensräume
www.dbg-phykologie.de
December 18, 2025 at 4:57 PM
bioinformer.bsky.social
This is epic! @officialatcc.bsky.social announced the winners of the 2025 Photo contest! They look amazing! Check the Alt text and follow the link for tons more. www.atcc.org/about-us/upc...

I love this! Please reshare! #microscopy #biology #research #science #cellbiology #microbiology #biotech 🧪🧬
2025 Most Popular Image Award for Microbiology Bouquet of Trebouxia Photographer - Sandra Story, NUBAD, LLC Trebouxia (ATCC 30426) is a free-living green alga that often forms a symbiotic relationship with certain fungi. Trebouxia has a complex life cycle showing many cellular forms including motile. 2025 Most Popular Image Award for Cell Biology Mitosis in Color: A Super-Resolution View Photographer - Avishkar Sawant, Vanderbilt University Super-resolution image of a fixed hTERT-RPE1 cell (ATCC CRL-4000) undergoing mitosis, highlighting the intricate organization of cytoskeletal networks. DNA (cyan), vimentin (depth color-coded), microtubules (red), and actin (magenta) were visualized using NSPARC. The image is presented as a maximum intensity projection of NSPARC stacks. 2025 ATCC Excellence Image Award for Microbiology Microbial Minimalism Photographer - Mindy Engevik, Medical University of South Carolina This is an SEM image of Lactobacillus reuteri (ATCC 6475). 2025 ATCC Excellence Image Award for Microbiology The Butterfly Effect Photographer - Sandra Story, NUBAD, LLC Klebsiella pneumoniae (ATCC 13883) and Bacillus subtilis (ATCC 6501). Fluorescence microscopy composite image of a mixture of bacteria that can be representative of a chronic poly-bacterial infection. Large masses of cells are Klebsiella pneumoniae exposed to a high dose of ertapenem causing the cells to elongate 10-50 times their normal size. Long rigid filaments are Bacillus subtilis common in soil, while Klebsiella pneumoniae are part of the normal microbial flora of the human lower digestive tract. Mixed genera of bacteria can coexist as poly-bacterial biofilms which supports exchange of drug resistance determinants via inter-species and inter-genus horizontal gene transfer. The biofilm-mode of growth supports other synergistic interactions that enhance virulence and promote resistance to antimicrobials resulting in difficult to treat chronic infections. Bacteria were cocultured in nutrient broth exposed to penicillin and incubated at 37 degrees Celsius to allow biofilm development. Samples of the biofilm were stained with three fluorescent dyes FM-64 (red, membrane stain), DAPI (blue, nucleic acid stain for both live and dead cells) and SYTOX Green (green, nucleic acid stain for dead cells) and then spotted onto an agarose nutrient pad sandwiched between a microscope slide and coverslip. The sample was viewed using a Leica DMi8 and illuminated using Texas red, DAPI and GFP filter sets. Images were taken with a K5 microscope camera. Scale bar 20 uM, 1000X magnification.
September 15, 2025 at 5:07 PM
pumpchief.bsky.social
Speaking from what is essentially 0 experience, i always bet on Trebouxia
May 4, 2026 at 10:12 PM
jxbotany.bsky.social
☀️ RESEARCH ☀️

The most common lichen photobiont genus, Trebouxia, exhibits highly species-specific responses to high light conditions, indicating the complexity of the mechanisms these organisms use to withstand stress - Poquita-Du et al.

🔗 doi.org/10.1093/jxb/...

#PlantScience 🧪
Fig. 1.Experimental design showing the number of six-well culture plates (total of 24 plates) containing cells of all Trebouxia species (S09 C0004, S19 C0005, S12 C0006, A06 C0007, A10 C0009, A04 C0010). The cells were subjected to two light regimes: either control (60 μmol photons m−2 s−1) or high light (150 μmol photons m−2 s−1), at two time periods: 1 h and 3 d. One batch of six-well plates (n=12) were designated mainly for fluorescence measurements, which consisted of three independent biological replicates for each light treatment and period. To avoid any confounding effect from fluorescence measurements, a separate batch of six-well plates (n=12) were designated for RNA extraction and subsequently gene expression analysis. Created in BioRender. Du, R. (2025)
January 25, 2026 at 11:27 AM
biorxivpreprint.bsky.social
Chromosome-level genome assembly of the photobiont alga Trebouxia sp. 'A48' from Xanthoria parietina provides new insight into the lichen symbiosis https://www.biorxiv.org/content/10.1101/2025.05.01.651714v1
May 7, 2025 at 8:33 PM
biorxiv-genomic.bsky.social
Chromosome-level genome assembly of the photobiont alga Trebouxia sp. 'A48' from Xanthoria parietina provides new insight into the lichen symbiosis https://www.biorxiv.org/content/10.1101/2025.05.01.651714v1
May 7, 2025 at 8:33 PM
esedia.bsky.social
30) Trebouxia shows evidence of at least 3 horizontal gene transfer events—protein-encoding genes that were inserted into algal genome from the fungal partner, most likely via a virus
August 16, 2025 at 7:59 PM
bio-protocol.bsky.social
A Simple Protocol for Periodic Live Cell Observation of Flagellate Stages in the Lichen Alga Trebouxia

Work by Enrico Boccato, Fabio Candotto Carniel and Mauro Tretiach at University of Trieste.

#LifeSciences #Reproducibility #PlantScience
January 26, 2026 at 10:10 AM