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The effect of cry1 under continuous blue light is not affected by the presence or absence of phyA and phyB. Hypocotyl growth relative to dark controls (A) and cotyledon unfolding (B) in wild-type (WT), hy4, phyAphyB, and phyAphyBhy4 seedlings exposed to blue light (without a red- or a far-red-light background). In dark-grown seedlings the angle between the cotyledons was 0 for all genotypes. The arrows indicate the effect of cry1 in the PHYAPHYB and phyAphyB backgrounds.
