Summary
After a long exposure to far-red light (20 hrs, 715 mn) a short red irradiation does not induce germination again. After shorter exposure to far-red (10 hrs) the reversible red far-red reaction takes place. The germination in complete darkness is probably due to the presence of Pfr 1 in dry seeds.
The photoinhibition of the germination by far-red light depends on the level of the photostationary state (P730/PTotal) and on the quantum flux density.
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Equipe de recherche associée au C.N.R.S. »Phytochrome et perméabilité membranaire«
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Rollin, P., Malcoste, R. & Eude, D. Le rôle du phytochrome dans la germination des graines de Nemophila insignis (L.). Planta 91, 227–234 (1970). https://doi.org/10.1007/BF00385482
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DOI: https://doi.org/10.1007/BF00385482