Understanding the internal daily rhythm system in Arabidopsis plants

The circadian clock in Arabidopsis is structured around three interlocked feedback loops: the core loop, morning loop, and evening loop.

• These feedback loops coordinate biological processes with environmental cues.
• Components of the loops are regulated by transcriptional, post-transcriptional, and posttranslational mechanisms.
• TOC1 exhibits DNA-binding and repressive activities, challenging previous understandings of its role.
• Alternative splicing of circadian clock-related genes is crucial for the clock's normal function and environmental responsiveness.

Simplified