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George R. L. Greiff

@ilichenmoss2.bsky.social
677 followers 674 following 164 posts

Research Associate in the Carella Group at the John Innes Centre. Interested in plant-microbe interactions, evo-devo and natural history. Microbotanist: bryology and bryo-mycology. Views his own.

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Reposted by George R. L. Greiff
James McCulloch @jamesimcc.bsky.social · 17/09/2026
New species now out in @soilorganismsj.bsky.social! soil-organisms.org/SO/article/v... The latest addition to the UK's springtail fauna: Entomobrya terraeincognitae sp. nov. I found this species on fieldwork for my PhD @sangerinstitute.bsky.social at the Cambridge botanics. 🧵
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justingoodrich.bsky.social @justingoodrich.bsky.social · 09/09/2026
Registration now open for the Non Seed Plant Meeting in Edinburgh on Dec 15. All welcome. Registration link and poster below www.epay.ed.ac.uk/conferences-...
Poster advertising the meeting
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Erica McAlister @flygirlnhm.bsky.social · 27/08/2026
Researching old Entomology books for an upcoming talk in the @nhmlibraryarchives.bsky.social From 1823, a series of pamphlets (all together here) by Christian F Vogels ‘Schmetterlings-Cabinet für Kinder’ or Butterflies for children was published. 200 years old & still wow @royentsoc.bsky.social
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Sophie Carr @sophiecarr.bsky.social · 27/08/2026
You can't beat the raw power of a very fast exposure. 1/5000 second captures this incredible spectacle - Háifoss in #Iceland.
A portrait orientation photo of the bottom part of a waterfall where the water crashes against some rocks on the back wall and spray comes out over some large black rocks. B&W conversion to give it a bit more oomph and atmosphere.
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Dean Mac Cú Uladh @dmac00.bsky.social · 22/08/2026
How amazing to find Mountain Everlasting (Antennaria dioica) on Sliabh Muc, Co. Down after a long hiatus of 146 years since Praeger last recorded it!! Other lovelies included parsley fern, beech fern, alpine club moss and dwarf willow. The Mournes deserves so much more conservation attention!!
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Phil Carella @philcarella.bsky.social · 04/08/2026
RA position working on Marchantia reproductive development in the Penfield group at JIC. Deadline is August 18th!
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Charlotte Kirchhelle @ckirchhelle.bsky.social · 29/07/2026
Our latest for your summer reading list: how do plants control growth at the organ surface? So proud of @zoenv.bsky.social's magnum opus and grateful to all the other authors, including Annamaria Kiss, @nathan-german.bsky.social, and @moritznowack.bsky.social! www.cell.com/current-biol...
cell.com
Plant cells at the organ surface use mechanical cues to activate a specific growth-control program
Nemec-Venza et al. show how mechanical signals, such as tissue tension, can activate gene expression in epidermal cells at the surface of Arabidopsis roots. The expression of the edge-specific growth ...
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Jamie Warren @mossmalarkey.bsky.social · 27/07/2026
Haplomitrium hookeri (Hooker's Flapwort) growing on the edge of the afon Wysg 19.7.26 🏴󠁧󠁢󠁷󠁬󠁳󠁿 @bbsbryology.bsky.social
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Jamie Warren @mossmalarkey.bsky.social · 27/07/2026
Marchantia polymorpha subsp.Polymorpha (star-headed Liverwort) growing on the edge of the afon wysyg 19.7.26 ,love that broad conspicuous black midrib 🏴󠁧󠁢󠁷󠁬󠁳󠁿 @bbsbryology.bsky.social
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Carlos M Herrera @cmhmaliani.bsky.social · 23/07/2026
Let me introduce the main characters in this story, the Gladiolus and its two Metschnikowia yeasts
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George R. L. Greiff @ilichenmoss2.bsky.social · 19/06/2026
Happy to announce our study that has just been published from work done during my PhD at the University of Bristol working in Prof. Jill Harrison's lab. It's about WOX genes and sporophyte development in the model moss, Physcomitrium patens. Take a look 🧵👇
A wild-type shoot with a single apical sporophyte (left) beside a Ppwox13lc mutant with three sporophytes on the same shoot (right).
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Nathan Probably @nathanprobably.bsky.social · 01/06/2026
Big congrats to the exceedingly fungal @ilichenmoss2.bsky.social for their BBC debut. Was really fun to work together on this and a real tribute to the excellent work that George does (and continues to do!) 🍄 www.youtube.com/watch?v=nRHz...
youtube.com
'Killer fungus' destroying invasive plant in UK | BBC News
YouTube video by BBC News
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George R. L. Greiff @ilichenmoss2.bsky.social · 31/05/2026
Thank Astrid! Great to see the small stuff get some time in the spotlight and hopefully we can continue to learn more about the fungus, its host range and its ecological impact.
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Plant Science Spotlight @plant-sci.bsky.social · 05/05/2026
Don’t reach for ChatGPT Images or Nano Banana as your first option when creating scientific images There are multiple free and open-source images, icons, and tools for creating scientific illustrations. #plantscience @stephenturner.us blog.stephenturner.us/p/free-open-...
blog.stephenturner.us
Free and open-source images, icons, and tools for creating scientific illustrations
Phylopic, NIH Bioart, Bioicons, Scidraw, Open Science Art, Health Icons, Servier Medical Art, Biodiversity Heritage Library, the Noun Project, Segment Anything, Excalidraw, draw.io, Biographics
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Jake Dalzell @bitheolaidhe.bsky.social · 06/05/2026
I was very excited to find Pignut growing out of a cowpat today that had its undescribed Plasmopara. It's amazing what shows up in a quadrat! #FungiFriends #WildPlantDisease
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Sophie Carr @sophiecarr.bsky.social · 21/04/2026
Celebrating five years of drone ownership, renewing my flyer ID today with 38/40 on the test (yay!). Here's a few of my favourite drone photographs from the past few years from #Iceland. Such a fun addition to my trips there :) #DJIAir2S #DJIMavic3Pro #DronePhotography
Drone view of hot lava streams over dark black lava landscape. In the distance is a mountain with a patch of sunset brightness on the horizon. Blueish smoke rises.A drone view over a river estuary where there are pretty channels meeting a paler grey area with visible streams and ripples. Looks a bit like a wave breaking.A view over a colour river estuary with pale cream and blue streams and channels, with some brown and gold sand banks visible.A view over a hot bubbling pool with some colourful run-off. It looks a bit like a burning comet falling through the air, an eye with tears or lashes streaming from it, or a jellyfish with long tentacles. The pool is blue and the run off area is pale pink and green, with some green grasses and red rocks surrounding it.
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Johannes Merz @mosssoup2.bsky.social · 19/04/2026
Sphaerocarpos cf europaeus, a strange looking liverwort growing on bare disturbed soil in extensively managed arable fields, endangered across Europe 🌿
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George R. L. Greiff @ilichenmoss2.bsky.social · 10/04/2026
One often sees microscopic fibres in moss samples, unfortunately.
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George R. L. Greiff @ilichenmoss2.bsky.social · 06/04/2026
Nice to find good material of a tiny fungus, Bryobroma caudatum, on the liverwort Diplophyllum albicans yesterday. The fungus produces tiny fruitbodies up to only 75 microns diam. and spores with little tails. The distinctive mycelium forms a network over the host cell walls without killing them.
Two shoots of the liverwort, Diplophyllum albicans, under the compound microscope at around x100 total magnification. They have dark reddish-brown stems and green leaves. There are small, black spots on some of the leaves along with tiny open networks of brown, anastomosing hyphae.A ruptured black-brown fruitbody of Bryobroma caudatum with two hyaline, globose immature asci emerging from it. The fruitbody is sitting on a fragment of leaf tissue with mycelium on top of it. Image at x1000 magnification.Some ellipsoidal, hyaline ascospores beside a ruptured fruitbody of the fungus. One with a tail is indicated by an arrow.The mycelium of B. caudatum and related species is formed of conspicuous brown hyphae that mostly grow on top of the anticlines of the host cells, occasionally forming tiny pin haustoria that penetrate the cell walls (not easily visible unless sections are made). The host cells cytoplasm is intact and the underlying cells are living, with chloroplasts and oil bodies. Image at x1000 magnification.
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Marc Somssich @somssich.bsky.social · 24/03/2026
#PlantScienceClassics #20: Kinetin & Cytokinins. In 1955 Carlos Miller, Folke Skoog & co-workers describe the first #Cytokinin and its role in promoting cell division and growth promotion. #Phytohormones #PlantScience #PlantDevelopment pubs.acs.org/doi/abs/10.1... pubs.acs.org/doi/abs/10.1...
The authors of the two papers. Carlos O. Miller standing on the left, looking down upon a couple of glass beakers. Opposite him, from the back to the front, are Malcolm H. van Saltza, Francis Shigeo Okumura, Folke K. Skoog and Frank M. Strong. Below the photo are the headers of their two papers describing kinetin, the first cytokinin: “Kinetin, a cell division factor from desoxyribonucleic acid” by Carlos O. Miller, Folke K. Skoog, Malcolm H. van Saltza and Frank M. Strong, and “Structure and synthesis of kinetin” by Carlos O. Miller, Folke K. Skoog, Francis Shigeo Okumura, Malcolm H. van Saltza and Frank M. Strong. Both published in 1955 in the Journal of the American Chemical Society.
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Hugues Renault @huguesrenault.bsky.social · 28/03/2026
Ever wondered how the #cuticle, a hallmark of land plants, was established? In our latest study, we show that the CUTIN SYNTHASE enzyme family was a key driver of this evolutionary innovation. #plantscience ▶️ www.biorxiv.org/content/10.6... A thread 🧵 [1/8]
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Chris Thorogood @christhorogood.bsky.social · 28/03/2026
We sequenced the genome of 'desert ginseng' (Cistanche deserticola) - a leafless parasitic plant that gave up photosynthesis - and found it lost huge chunks of its own genome…but started stealing genes from its host! Thanks to my collaborators Prof Huang + her talented team👏🏻 lnkd.in/evF5iU9G
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Moi Expósito-Alonso (MOILAB) @mexpositoalonso.bsky.social · 26/03/2026
Our new experimental evolution study across 30+ locations using the plant Arabidopsis thaliana —— we direct "see" adaptation and extinction to different climates at the genetic as it happens! Read it in Science dx.doi.org/10.1126/scie... @ucberkeleyofficial.bsky.social @hhmi-science.bsky.social
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Jamie Warren @mossmalarkey.bsky.social · 24/03/2026
A return visit to the Llyn peninsula for a ten day mossing Sesh, Saturday was back at Mynydd Tir-y Cwmwd were last year i discovered a new site for the nationally Scarce liverwort Cephaloziella dentata (toothed Threadwort) here it is amongst Cladonia @bbsbryology.bsky.social
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Jamie Warren @mossmalarkey.bsky.social · 24/03/2026
Nice to find Riccia beyrichiana (Purple Crystalwort) on Saturday at Mynydd Tir-y Cwmwd,a new site for it on the Llyn Peninsula,a lovely chunky Riccia and in good amounts,nice @bbsbryology.bsky.social
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Jamie Warren @mossmalarkey.bsky.social · 24/03/2026
Entosthodon attenuatus (Thin Chord-moss) on wet peaty soil on Mynydd Tir-y Cwmwd on Saturday,nice to see fruiting nicely , lovely cherry-red Rhyzoids on this species,I didn't look at those as only this patch so left alone @bbsbryology.bsky.social
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Jamie Warren @mossmalarkey.bsky.social · 24/03/2026
Philinotis rigida (Rigid Apple-moss) at Mynydd Tir-y Cwmwd on Saturday, Spherical Capsules on a long Setae,a moss of wet Cliffs and river banks ,always nice to cast an eye over @bbsbryology.bsky.social
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Alexis Rastier 🌿 @alexisrastier.bsky.social · 20/03/2026
#Fernfriday While visiting a tropical greenhouse, I observed the abaxial surface of the fertile pinnae of Niphidium crassifolium, revealing globular sori that consist of an array of minute leptosporangia.
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Eftychis Frangedakis @e-frangedakis.bsky.social · 16/03/2026
Please RP 🕊️: Postdoc position in my budding group at OIST. Looking for a colleague to work at the interface of chloroplast biology, evo-devo, and synthetic biology. More info here 📃: www.oist.jp/careers/post...
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Jeff, Stopping by Woods @jeffontherock.bsky.social · 15/03/2026
Cladonia lichen (Cladonia amaurocraea, I think). NWT, Canada. The photo covers about 5cm, left to right. #lichen #fungi #fungifriends
Photo of a cluster of grey and mottled green lichen that consists of numerous, stalked structures topped with discs. The edges of the roundish discs are spiky. The ends of the spikes are reddish brown.
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Alan Rockefeller @alanrockefeller.bsky.social · 08/03/2026
Mycena chloroxantha photographed recently in Oxapampa, Peru. The round cells are cherocytes which make up the universal veil - whitish, spiny acanthocytes are also visible. Described in 1983 from Brazil by Rolf Singer. Mushroom Observer # 628987 / iNat 341877230 #fungifriends #mycology #mycena
Mycena chloroxantha
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Dean Mac Cú Uladh @dmac00.bsky.social · 08/03/2026
Now found in 5 Irish counties as of yesterday from Cos. Louth/Armagh and this marks the first for the east coast! Phenologically has been recorded In July, September, October and March #fungifriends #ireland #bryology #liverwort
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Genetics Society Non-Seed Plant SIG @gensocuknonseed.bsky.social · 06/03/2026
The #nonseedUK26 meeting will be held at the Royal Botanic Garden Edinburgh on 15th December 2026. Please save the date. Further details will follow 😃
media.tenor.com
a sign that says save the date in orange letters
ALT: a sign that says save the date in orange letters
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Peter Braubach @peterbraubach.bsky.social · 17/01/2026
Stacking with raw and 4-pixel shift. The images blow my mind - the process, shooting, stacking and developing from raw, is slow - - Probably not what I will be doing regularly. Lichen people: Do you have ideas how to use such images to add value? drive.google.com/file/d/1a2gS...
Lichen squamules on sandy soil.
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Rob Yaxley @robyaxley.bsky.social · 16/01/2026
Also it was good to see that the legally protected Paralecanographa grumulosa is still present on the north and east side of Winterton church. A parasite of Dirina massiliensis.
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Dean Mac Cú Uladh @dmac00.bsky.social · 04/01/2026
This is an amazing record if this rare fungi that is closely linked to temperate rainforest. Not before observed in the SE of Ireland!! Wow
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Dean Mac Cú Uladh @dmac00.bsky.social · 30/12/2025
New site record of Hymenophyllum tunbrigense for Co. Louth (H31) growing in a rocky woodland on a minor hill. Happy to find this one today. A very scarce species in the county. @bsbiireland.bsky.social @bsbibotany.bsky.social #ferns #botany #filmyferns
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Juliet Turner @juliet-turner.bsky.social · 17/11/2025
POV: you are a young woman celebrating a recent academic success
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Dean Mac Cú Uladh @dmac00.bsky.social · 03/11/2025
First record of large leafy liverwort Bazzania trilobata for co Derry (H40) since 1834! Also growing alongside it was Hymenophyllum tunbrigense which is a new county site too. Ness Country Park, Co. Derry. @bsbiireland.bsky.social @bbsbryology.bsky.social #bryophytes #ferns #botany
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George R. L. Greiff @ilichenmoss2.bsky.social · 23/09/2025
A final micrograph for today showing mycelium of an Epibryon sp. fungus inside liverwort cells. Most cells are infected but some in the lower part of the photo are healthy, as evidenced by the absence of hyphae and the presence of oil bodies.
Micrograph of liverwort cells, some of which are infected with brown fungal hyphae while others are healthy and contain plastids and oil bodies.
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George R. L. Greiff @ilichenmoss2.bsky.social · 23/09/2025
Micrograph of a rhizoid gall caused by a chytrid on Bryum moss. The infected cell contains several zoosporangia, some of which have thread-like exit tubes that release flagellated spores. Chytrids are interesting fungi that mostly lack hyphae and have mobile spores.
A rhizoidal gall on Bryum sp. from mud in a reservoir draw-down zone. It is club-shaped and curved, containing five chytrid zoosporangia inside it, which are spherical. Some of the zoosporangia have thread-like exit tubes leading to the outside, which liberate zoospores that infect other cells.
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George R. L. Greiff @ilichenmoss2.bsky.social · 23/09/2025
Great to find the fungus Bryobroma scapaniae on Scapania undulata in Bannau Brycheiniog in Wales a few days ago. I think this is the third ever record of the species, and I see how it is very easy to miss, with the dark fruitbodies disguised against the black host stem. From a rock in a stream.
A single shoot of Scapania undulata photographed against a white background. The apex is green while the brown lower parts display infection (arrowed). Bryobroma scapaniae presents as clustered black ascomata and infected tissues are covered by a dense, dark brown mycelium network.Zoomed in on some infected leaves with dark brown, branching mycelium and black fruitbodies.Clusters of black fruitbodies on largely leafless basal part of the plant shoot.
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The British Lichen Society @britishlichensociety.org.uk · 05/09/2025
An opportunity of a lifetime for budding lichenologists. The National Trust and the Royal Botanics, Edinburgh are offering a PAID lichen traineeship in #Scotland! The work programme looks fascinating and a great opportunity to develop skills. Deadline: 3/10/2025. www.asva.co.uk/jobs/trainee...
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George R. L. Greiff @ilichenmoss2.bsky.social · 05/09/2025
Thanks, Jill! It was an unexpected honour and it has been amazing to see how my cohort has grown and developed over the years. Now, for the final push! @gpsep.bsky.social
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George R. L. Greiff @ilichenmoss2.bsky.social · 13/08/2025
Using one of my favourite bryophyte books to help with my thesis. It is a difficult read, densely packed with all kinds of interesting and almost forgotten information. I must have read it half a dozen times, and each time, I notice something profound that I either missed or didn't understand before
The book, "The Structure and Life of Bryophytes" by E. V. Watson. It has a green and white cover with line drawings of bryophytes on it.
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Katie Mack @astrokatie.com · 10/08/2025
"PhD-level experts in your back pocket" is a completely nonsensical description of AI but a pretty good description of social media if you follow the right people
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Jo Wilbraham @jowilbraham.bsky.social · 05/08/2025
It's publication day for Mosses, Liverworts and Hornworts of the World! Immerse yourself in the miniature world of these fascinating plants, delve into their evolutionary past and look ahead to what might be in store for their future. More details at: shorturl.at/Zmtfe
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David Clark @clarkeocrinus.bsky.social · 01/08/2025
Petoskey stone is a fossil coral and Michigan's state stone. This is from the Devonian Rockport quarry north of Alpena. Most Petoskey stone is found on the beach and rounded smooth. #FossilFriday
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George R. L. Greiff @ilichenmoss2.bsky.social · 12/07/2025
It was nice to go for a run past the spot that got me interested in bryophytes 10 years ago when I was staying at my grandfather's place. I was struck by the outerwordly appearance of the liverwort Conocephalum conicum, which was completely covering the wall of this bridge back then.
Strava map of run route along cycle track with mossy bridge indicated by arrow.North-facing wall of Victorian railway bridge with seepage supporting bryophytes, particularly Conocephalum conicum.The liverwort Conocephalum conicum growing on damp brickwork, the bryophyte that started it all for me 10 years ago.
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George R. L. Greiff @ilichenmoss2.bsky.social · 09/07/2025
Happy to announce a new species bryophilous fungus, Bryocentria insolens. It is a parasite of Orthotrichaceae and known from Switzerland and Belgium so far. Thanks to my coauthors for finding great specimens - it all started from an AscoFrance post over 2 years ago. pfsyst.botany.pl/-Bryocentria...
pfsyst.botany.pl
<i>Bryocentria insolens</i> (<i>Hypocreales</i>) – a new bryophilous ascomycete on <i>Lewinskya</i> and a preliminary phylogenetic analysis of European <i>Bryocentria</i>
The bryophilous genus Bryocentria comprises nineteen species of mostly hepaticolous parasites exhibiting a range of distinctive ascospore features and host-parasite interactions. While Bryocentri...
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