Does the plant clock gate auxin responses?
The Arabidopsis circadian clock regulates auxin-responsive transcription and gates growth responses to auxin.
Source
The circadian clock regulates auxin signaling and responses in Arabidopsis
Study at a glance
- Design
- Animal / in-vitro — Circadian transcriptomes overlapped with auxin responses; timed auxin transcriptional/growth assays
- N
- Arabidopsis seedling genome-wide profiling — no single organismal N in stored text
- Population
- Arabidopsis thaliana seedlings
- Outcome
- Clock gating of auxin transcriptional responses and growth
Structured fields used in claim comparison tables when every cited study has a complete layer.
What they did
Profiled circadian transcriptomes and tested overlaps with auxin-regulated genes, then assayed transcriptional and growth responses to auxin across the day.
What they found
>10% of seedling genes cycle; auxin-induced genes are enriched for clock regulation; endogenous/exogenous auxin transcriptional responses and auxin-driven growth are clock-gated.
The limits
What it doesn't show
Does not fully map every clock–auxin molecular node in all tissues or prove clinical relevance outside plants.
Key terms
- Circadian clock
- Endogenous ~24 h timing system coordinating physiology.
- Auxin
- Plant hormone controlling growth and development.
- Gating
- Time-of-day restriction of response amplitude to a stimulus.
- Transcriptional profiling
- Genome-wide measurement of mRNA abundance over time.
Flashcards
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Quiz yourself
Clock effect on auxin transcription:
Common questions
Are auxin genes clock-enriched?
Yes—more than expected by chance.
Is growth gated?
Yes—responses to exogenous auxin are clock-gated.
How many genes cycle?
Over 10% of expressed seedling genes in their estimate.
Organism?
Arabidopsis.
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