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Inhibition of hypocotyl elongation by R+FR dichromatic irradiation. Inhibition of growth of phyA-201 (A), phyB-5 (B), and ABO (C) seedlings was determined after 3 d under different fluence rates of R (660 nm) in addition to a constant irradiation with light of 756 nm (12.6 μmol m−2 s−1). The white symbols correspond to the R (11.0 μmol m−2 s−1) or FR irradiation alone. D, Relative inhibition of phyB-5 compared to wild type. Means of at least three replica experiments are given ±se.
