Abstract
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 induced most effectively by a brief exposure to red light (R). A subsequent brief exposure to far-red light (FR) results in negation of these effects. The action spectra for such responses, as typified by that in Fig. 1 for induction of the opening of the hypocotyl plumular hook of beans resulted in Borthwick and Hendricks postulating the existence of the pigment phytochrome which existed in two forms, interconvertible by light (Borthwick et al. 1952; Borthwick 1972).
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Kronenberg, G.H.M., Kendrick, R.E. (1986). The physiology of action. In: Kendrick, R.E., Kronenberg, G.H.M. (eds) Photomorphogenesis in plants. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2624-5_6
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DOI: https://doi.org/10.1007/978-94-017-2624-5_6
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