Slowing down on hot days: How morning PRR9 controls the pace of the plant circadian clock.

PRR9 protein condensation modulates plant circadian clock speed in response to high temperatures, ensuring temperature compensation.

• Why it matters: Understanding how plants maintain a consistent circadian rhythm across varying temperatures is crucial for improving crop resilience amid climate change.
• What they did: He et al. investigated the role of PRR9, a morning clock protein, focusing on its condensation behavior and interactions at high temperatures, revealing a key temperature sensing mechanism.
• The result: The findings demonstrate that PRR9 condensation adjusts clock pace during heat stress, enabling plants to sustain stable circadian timing and adapt to temperature fluctuations.