response to photoperiod, red light
Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a red light photoperiod stimulus. Red light is electromagnetic radiation of wavelength of 580-700nm.
GO:0009648
photoperiodism
is_a
GO:0010114
response to red light
is_a