Related Experiment Video
Updated: Jun 5, 2026

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities
Published on: February 2, 2018
Photoperiodism: shall EYA compare thee to a summer's day?
1Chronobiology Unit, University of Groningen, Life Science building, Nijenborgh 7, 9747 AG Groningen, The Netherlands. r.a.hut@rug.nl
Abstract:
Seasonal changes in day length are used by plants and animals to synchronize annual rhythms in reproduction, physiology, and behavior to the environment. Increasing day length during spring causes sudden changes in the mammalian reproductive system once the critical photoperiod is reached. The molecular mechanism behind this switch is now quickly being elucidated.
More Related Videos
Related Concept Videos
Biological Clocks and Seasonal Responses
Photoreceptors and Plant Responses to Light
Light as Energy
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Light Acquisition
Photoelectric Effect

