Two scientists in lab coats analyzing plant samples in a greenhouse filled with yellow flowers.
📢New paper alert:
🍄 Friendly #fungi hijack #plant regulator to promote #symbiosis - study uncovers #mechanism that helps fungi to colonize plant #roots
👉 Link: www.nature.com/articles/s41...
@an-pocheng.bsky.social @carogutj.bsky.social
Thrilled to see this published! 😄
Our dispatch examines potential additional fungal symbionts in lichen partnerships and the key challenges in unraveling their biology.
Thanks for involving me in this @talbotlabtsl.bsky.social
@currentbiology.bsky.social
www.sciencedirect.com/science/arti...
Congrats @ottlab.bsky.social and @pengbo10.bsky.social for leading this work!
Thank you! ☺️
Thank you so much Hyeonmin 🫶🏻
New paper from the lab. Important insights into the compartmentalisation of terpene biosynthesis in Marchantia oil body cells. #PlantScience #SynBio www.nature.com/articles/s42...
Thank you David! ☺️
Thank you Darius 🫶🏻
Thank you Tonni 🫶🏻
A huge THANK YOU to all co-authors @pierremarcdelaux.bsky.social @melaniekrich.bsky.social @mbianc.bsky.social @kellerjeanphd.bsky.social & more ! We are grateful for our funders @dfg.de @erc.europa.eu MSCA @agencerecherche.bsky.social
13/ Overall, our data suggest that GA-independent developmental phenotypes are evolutionary conserved in #MyMarchantia, while AMS-related phenotypes are not. We propose that GA-dependent DELLA functions evolved in vascular plants and were co-opted as an additional layer of control during AMS.
12/ However, neither GRAS13 single mutants, nor the double mutants were impaired in infection or arbuscule formation apart from a slight quantitative decrease in colonization in the double mutants. We conclude that this reduction is rather due to the developmental phenotypes than symbiotic functions
11/ Thus we generated GRAS13 single mutants and DELLA/GRAS13 double mutants in #MyMarchantia. We found no strong developmental defects in the GRAS13 single mutants, while double mutants mirrored developmental phenotypes of the DELLA single mutants - but to a much stronger extend.
10/ We were wondering whether there might be functional redundancy for DELLA functions during AMS with a close paralog, GRAS13, which lacks the DELLA domain.
9/ We found a slight quantitative reduction of AMS in the DELLA mutants, which might be linked to developmental phenotypes though. Arbuscules were present in all mutant alleles without major defects compared to control plants.
8/ In angiosperms, DELLA mutants show strong defects during arbuscular mycorrhizal symbiosis (AMS), ranging from abolished infection to highly impaired arbuscule formation.
Thus, we asked whether DELLA functions during AMS are conserved in #MyMarchantia ?
7/ Interestingly, growth speed of the mutants was increased at medium light regime, but resulted highly asymmetric growth patterns and colororation, as well as enhanced gemma cup production. A similar effect was observed at high light regime.
6/ We found that DELLA mutants were retarded in growth, while producing less gemma cups in comparison to control plants. At the same time the plants appeared less green and chlorophyll absorption was reduced as well.
5/ The DELLA mutants appeared slightly more yellow-ish and produced less gemma cups than control plants, which prompted us to quantify these properties in a controlled setup.
4/ While growing the plants, I noticed some interesting features of the DELLA mutants - which resulted in a little game we used to play with @pierremarcdelaux.bsky.social, called "can you spot the DELLA mutant?"
...Can YOU spot them?
(Tip: 4 control plants in this picture; reveal in next reply)
3/ To tackle this question, we generated knock-out mutants of the single DELLA ortholog in M. paleacea.
2/ DELLA proteins were shown to play diverse roles in plant-microbe interactions, development and stress responses regulated by the hormone GA in angiosperms. GA receptors and biosynthesis are absent in bryophytes - we asked whether DELLA functions are evolutionary conserved in #MyMarchantia?
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...
Amazing work!! Congrats!! 🥳
Really happy to see this one out: www.sciencedirect.com/science/arti... Alibek's drive & great coll w/ friends @gekaragoz.bsky.social & E. Hallacli resulted in a cool story that starts with our beloved #Marchantia and ends with iPSC-derived neurons 🤩🤪 A short 🧵
Both of them rock!
I totally agree with you though!! 😏
Finishing the week with some beautiful Marchantia - colonized by R. irregularis ❤️ #symbiosisrocks ☺️
Amazing talk ahead by @charlesrleveillee.bsky.social here in Toulouse 🥳
Looking forward to great science!!
Multi-omics analyses of mutants for Marchantia polymorpha FERONIA and MARIS reveal a link between cell wall integrity and abscisic acid responses url: academic.oup.com/pcp/article/...
