PubMed · 2026-04-13
Scientists discovered a protein called SL1 that acts as a critical bridge between two important plant cell processes: editing genetic instructions inside chloroplasts and sending signals from chloroplasts to the nucleus. This finding helps explain how plants coordinate their internal communication during stress, which is essential for healthy growth and green leaf development.
SL1 is essential for 31 out of 34 RNA editing sites in Arabidopsis chloroplasts, making it the most broadly required editing factor identified to date.
Loss of SL1 causes complete loss of the NDH complex (a critical energy-processing machine in chloroplasts) and triggers a strong stress-signaling phenotype under herbicide treatment.
SL1 physically links the chloroplast's transcription machinery to its RNA editing machinery, suggesting these two processes are physically coupled in the same location within the chloroplast.
