The abstract is read at the publisher; the summary is JClub's.
In Arabidopsis thaliana roots, elevated temperature reprograms systemic auxin signalling, and light-dependent recovery determines whether lateral root primordia progress or arrest.
- Why it matters: Plants must match local organ formation with whole-plant environmental status, but how systemic hormonal states integrate light and temperature to gate branching is unclear.
- What they did: Using long-term luminescence imaging, time-resolved transcriptomics, and metabolite profiling, the study tracked ~24-hour auxin abundance and signalling rhythms at 21°C and tested responses at 29°C under different light conditions, alongside genetic analyses implicating phytochrome B, cryptochromes, and the morning circadian loop.
- The result: At 29°C, sufficient light enables systemic auxin signalling recovery that supports root branching-site progression, while reduced light yields weaker recovery and early primordia arrest; DAO1-mediated auxin oxidation reprograms these dynamics, with reduced oxidation sustaining signalling and lateral root development during warming.
The findingWhy it mattersWhat they didThe result
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