#Id: 9797
In dark-grown or etiolated plants, phytochrome is present in a red light–absorbing form, referred to as Pr. Pr, which to the human eye is blue, is converted by red light to a far-red light–absorbing form called Pfr, which is blue-green.
#XL - R Botany
#Mechanisms of action of Phytochromes
#Part B Pointers
