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Attenuation of phototropic curvature by phot1, phot2, cry1, and cry2 under 100.0 μmol m–2 s–1 of blue light. Measurements of phototropism in the Arabidopsis blue-light photoreceptor mutants are as follows: A and B, vertex curvature; C and D, angle of curvature at the hypocotyl tip; and E, the change in hypocotyl length after 960 min of 100.0 μmol m–2 s–1 of blue light. Error bars represent se.
