iiinova — where your digital self keeps evolving

Johanna Krahmer

@johannakrahmer.bsky.social

90 followers 86 following 2 posts

Assistant Professor at PLEN, University of Copenhagen, plant photobiology, metabolism and sugar transport

Posts Replies Media

Johanna Krahmer @johannakrahmer.bsky.social · 15/03/2026

Very excited that our review on carbon allocation to axial sink organs is published. Super writing experience and discussions with Anil and @bjazminrh.bsky.social, thank you both for your great work and ideas!

01710

Reposted by Johanna Krahmer

Journal of Experimental Botany @jxbotany.bsky.social · 11/03/2026

☀️⚡ SPECIAL ISSUE REVIEW ⚡☀️ The mechanisms by which light signalling integrates environmental cues with key energy-producing and -sensing metabolic networks to balance growth, resource allocation and defence, are reviewed – SharathKumar et al. 🔗 doi.org/10.1093/jxb/... #PlantScience 🧪

Fig. 2 (shortened, full legend in paper): Light signals activate the TOR pathway to mediate growth–defence trade-off decisions. The Target of Rapamycin Complex (TORC), comprising TOR and the accessory subunits RAPTOR (REGULATORY-ASSOCIATED PROTEIN OF TOR) and LST8 (LETHAL WITH SEC THIRTEEN PROTEIN 8), functions as a central regulatory hub that integrates environmental cues, such as light, with internal signals, including hormonal and energy status. TOR promotes growth under favorable conditions, but must be down-regulated during stress, such as pathogen attack, to redirect energy toward defense mechanisms. Light is a key environmental signal that stimulates photosynthesis, leading to increased energy production and sugar accumulation, both of which activate TOR signaling. As a central energy sensor, TOR is also closely linked to the circadian clock, regulating essential metabolic processes in a time-of-day-dependent manner.

174

Johanna Krahmer @johannakrahmer.bsky.social · 28/09/2025

Is phytochrome or the circadian clock following me to my patio? The long sunflower variety flowered several weeks before the short one.

030

Reposted by Johanna Krahmer

martinalegris.bsky.social @martinalegris.bsky.social · 07/07/2025

🔥Postdoc opportunity 🌱 The Legris lab at the University of Neuchâtel 🇨🇭 is looking for a Postdoc to work on the regulation of branching by warm temperatures. If you have a background on plant physiology and development, and you're interested in shoot thermomorphogenesis, apply now!

13854

Reposted by Johanna Krahmer

Blanca Jazmin Reyes-Hernandez @bjazminrh.bsky.social · 24/06/2025

🌱😊 Happy to share my N&Vs @plantphys.bsky.social I highlight a study showing how light modulates leaf expansion by controlling microtubule orientation. #PlantBiology #CellMorphogenesis #Microtubules #LightSignaling academic.oup.com/plphys/artic...

academic.oup.com

Guided by light, microtubules choreograph the directional expansion of cotyledons

In 1880, Charles Darwin and his son Francis observed one of the first clues that light can direct plant growth, describing how young plants sense light at

032