The physiology of action

摘要: The physiological processes induced by light, such as, induction of seed germination, flowering and de-etiolation, have all, under appropriate conditions, been shown to be most effectively a brief exposure red light (R). A subsequent far-red (FR) results in negation these effects. action spectra for responses, as typified that Fig. 1 the opening hypocotyl plumular hook beans resulted Borthwick Hendricks postulating existence pigment phytochrome which existed two forms, interconvertible (Borthwick et al. 1952; 1972).