title: Photoperiodism.
authors.affiliation: Department of Plant Science, Utah State University, Logan 84322, USA.
authors.forename: F B
authors.initials: FB
authors.lastname: Salisbury
mesh_terms: D001683:Biological Clocks; D003624:Darkness; D008027:Light; D017440:Photoperiod; D063245:Plant Development; D010937:Plant Growth Regulators; D010944:Plants / Q000528:radiation effects; D013696:Temperature
chemical_list: D010937:Plant Growth Regulators