Circadian rhythms spark plants' ability to survive freezing weather

Just as monarch butterflies depend on circadian cues to begin their annual migration, so do plants to survive freezing temperatures. All living things -- humans, animals, plants, microbes -- are influenced by circadian rhythms, which are physical, mental and behavioral changes that follow a 24-hour cycle. Researchers have now discovered that the circadian clock provides key input required for plants to attain maximum freezing tolerance.

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