Sign in

Aurélia Emonet

@aemonet.bsky.social
148 followers 216 following 18 posts
PostsRepliesMedia
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
7/ Could REV explain how C. chenopodiifolia develops both explosive and non-explosive fruit? There is still a lot to do to answer this question... but we found that gene duplication and polyploidy have driven REV functional diversification, which likely allowed one REV homeolog to respond to light.
130
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
6/ Since REVOLUTA is down-regulated in explosive fruit of C. chenopodiifolia, we wondered what would happen if we overexpressed REV in an explosive fruit? ➡️We induced REV in the endocarp b cell of C. hirsuta and this was sufficient to completely switch their SCW to uniform!
130
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
5/ So what about explosive fruit? In C. hirsuta, we did not find one, but two REV genes that control SCW formation. We had to knock-out 4 different HD-ZIPIII transcription factors to completely get rid of the endocarp b.
120
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
4/ Does REVOLUTA control the endocarp b SCW pattern? Looking at rev mutants, we found that in Arabidopsis, REV is necessary for SCW formation, but also for the endocarp b cell fate and the fruit valve polarity.
120
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
3/ We used this plasticity to compare the transcriptome of underground fruit exposed to light or dark ➡️We found that REVOLUTA is downregulated by light in explosive fruit This required dissecting fruit valves almost blindly in the dark 🙈 – a special skill we develop with @ciarankelly.bsky.social
130
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
2/Cardamine fruit rely on a polar secondary cell wall in the endocarp b layer to explode. C. chenopodiifolia also produces non explosive fruit with a uniform SCW. But if you exposed these underground fruit to light… Surprise! Their SCW pattern switches to polar and this make them explosive!💥
283
Aurélia Emonet @aemonet.bsky.social · 23/04/2026
Happy to share the third chapter of my postdoctoral adventure at @mpipz.bsky.social ➡️doi.org/10.64898/2026.04.20.719616 We used C. chenopodiifolia's ability to produce explosive aerial fruit and non-explosive underground fruit to identify REVOLUTA's role in cell fate and wall patterning🌿💥 ⬇️🧵
67229