ArticlePlant physiology2025
Apocarotenoid signaling regulates meristem activity and shapes shoot and root lateral organ formation in Arabidopsis.
Article in Plant physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed.
- An unknown apocarotenoid signal alters plant development by modulating shoot and root apical meristem activities.Plant physiology · 2025Article
- Plant LHP1 as a Context-Dependent Regulator of Polycomb-Associated Chromatin.Physiologia plantarumReview
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Authors and funding
8 authors.
Funding
Abstract
Plastids synthesize signals crucial for plant development, including carotenoid-derived molecules with hormonal and retrograde signaling functions that regulate nuclear gene expression, which is an emerging research area. Here we investigate the function of the plastid-derived apocarotenoid signal 1 (ACS1), whose accumulation disrupts plastid biogenesis, affects lateral organ formation, and compromises apical meristem maintenance. By modulating ACS1 levels in Arabidopsis (Arabidopsis thaliana) through different light conditions, we show its reversible and dynamic role in leaf and root development. Notably, the characteristic morphological defects of ACS1-accumulating mutants revert under conditions that limit its synthesis, even several days post-germination. This indicates that ACS1 does not cause irreversible damage but rather acts as a signal produced under specific tissues and conditions that associates with the cell-specific expression of its biosynthetic enzymes. Transcriptomic analysis of ACS1-accumulating mutants shows a critical developmental window during which ACS1 affects the expression of numerous plastid-housekeeping genes, correlating with an early block in plastid biogenesis after DNA replication and before transcriptional activation. This disruption affects chloroplast biogenesis and amyloplast starch accumulation. ACS1 accumulation also alters the expression of key developmental regulators, including genes involved in auxin signaling and transport, leading to compromised meristem maintenance and leaf expansion. Beyond photosynthetic tissues, ACS1 also disrupts root apical meristem organization, notably altering columella cell patterning and gravitropic responses. Overall, our findings establish ACS1 as a dynamic conditionally active plastid-derived signal that modulates plastid differentiation, meristem activity, and lateral organ development, underscoring the broader role of cis-carotenoid-derived signals in coordinating plastid function with plant growth and development.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.