Many living organisms on Earth have evolved the ability to integrate environmental and
internal signals to determine time and thereafter adjust appropriately their metabolism,
physiology, and behavior. The circadian clock is the endogenous timekeeper critical for
multiple biological processes in many organisms. A growing body of evidence supports the
importance of the circadian clock for plant health. Plants activate timed defense with various
strategies to anticipate daily attacks of pathogens and pests and to modulate responses to …