Definitions for "Phytochrome"
A plant chromoprotein involved in the regulation of light-dependent growth processes.
a light-sensitive pigment found within the plant cell. Phytochromes are involved in a number of light-related events, such as seasonal flowering, but are not considered hormones.
A reversible pigment occurring in green plants that changes form in response to exposure to light and dark, permitting plants to measure the length of the dark period.