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Updated: Jul 12, 2026

Single-cell Microinjection for Cell Communication Analysis
Published on: February 26, 2017
Interorganellar communication.
Paolo Pesaresi1, Anja Schneider, Tatjana Kleine
1Dipartimento di Produzione Vegetale, Università Statale di Milano c/o Fondazione Parco Tecnologico Padano, 26900 Lodi, Italy.
Retrograde signaling from chloroplasts and mitochondria influences nuclear gene expression. This process involves reactive oxygen species, redox state, and protein synthesis, with potential overlaps in signaling pathways.
Area of Science:
- Plant cell biology
- Molecular genetics
- Biochemistry
Background:
- Chloroplasts and mitochondria communicate with the nucleus through retrograde signaling.
- This signaling pathway regulates nuclear gene expression based on organelle status.
Purpose of the Study:
- To explore the signaling molecules and pathways involved in retrograde signaling.
- To understand the interplay between organelle signaling and nuclear gene expression.
Main Methods:
- Analysis of reactive oxygen species (ROS) and redox state.
- Investigation of the tetrapyrrole biosynthetic pathway.
- Assessment of organelle protein synthesis rates.
- Exploration of interactions with sugar and hormone signaling pathways.
Main Results:
- Identified potential signaling components within chloroplasts.
- Observed overlaps between different retrograde signaling pathways.
- Indicated multilayered transcriptional control in retrograde signaling.
Conclusions:
- Retrograde signaling is a complex process involving multiple organelle-derived signals.
- The transcription factor ABI4 appears to play a role in mediating retrograde signaling.
- Further research is needed to elucidate the exact signaling molecules and their mechanisms.
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