The Circadian Clock Regulates Auxin Signaling and Responses in Arabidopsis
2007
Circadian Clock Controls Plant Hormone Signaling
publication
Evidence: moderate
Author Information
Author(s): Michael Covington, Stacey Harmer
Hypothesis
How do plants use their internal clock to regulate growth hormone auxin signaling?
Conclusion
The study found that auxin signaling is regulated by the circadian clock, affecting plant growth and responses.
Supporting Evidence
- The researchers identified genes in Arabidopsis that show a circadian rhythm in transcription related to auxin signaling.
- Auxin and the circadian clock are intertwined at multiple stages of auxin signaling.
- Auxin treatment affects the circadian rhythm of gene expression in plants.
- The study demonstrated that auxin signaling is gated by the plant's internal rhythms.
Takeaway
Plants have an internal clock that helps them know when to grow and respond to their environment, and this clock also controls how they use a growth hormone called auxin.
Methodology
The researchers used a luciferase reporter assay to study the interaction between auxin signaling and circadian rhythms in Arabidopsis.
Digital Object Identifier (DOI)
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