circadian rhythms

Untangling the Complexity of the Plant Circadian Clock

June 28, 2018
In a new study, researchers found that the seemingly needless complexity of the plant circadian clock actually helps plants function in an array of environments.

Stacey Harmer Shines On with College of Biological Sciences Faculty Research Award

August 19, 2017
When it comes to plant rhythms, Stacey Harmer, a professor of plant biology at the University of California, Davis, is hip to the groove. Her research, which appeared in the August 5, 2016 journal of Science, describes how sunflowers track the sun, beginning each morning with their heads facing east, slowly swinging west throughout the day and then resetting eastward at night.

Sunflowers Move by the Clock

August 04, 2016
It’s summertime, and the fields of Yolo County are filled with ranks of sunflowers, dutifully watching the rising sun. At the nearby University of California, Davis, plant biologists have now discovered how sunflowers use their internal circadian clock, acting on growth hormones, to follow the sun during the day as they grow.