Phytochromes are involved in floral induction Photoperiod Flash of light LDP SDP R flowering vegetative FFR vegetative flowering R flowering vegetative ER+RIFR edetate flowering R flowering vegetative ERIR-ER-R-FR vegetative floweringPhytochromes are involved in floral induction Flash of light LDP SDP R flowering vegetative R+FR vegetative flowering R+FR+R flowering vegetative R+FR+R+FR vegetative flowering R+FR+R+FR+R flowering vegetative R+FR+R+FR+R+FR vegetative flowering Photoperiod