Table I.

Angle between cotyledons in WT and cry1 cry2 double mutant seedlings after daily pretreatments of 2.5 h UV-B +UV-A, UV-A, UV-B, or darkness, followed by a saturating R pulse

TreatmentAngle between Cotyledons (Degrees)
Genotype
WTcry1 cry2
UV-B + UV-A → R64 ± 464 ± 7
Residual UV-A → R16 ± 213 ± 2
UV-B → R61 ± 471 ± 7
Darkness → R6 ± 217 ± 5

One-day-old seedlings (24 h after the R pulse used to induce germination) were exposed for 3 d to these treatments. Data are means ± se of six replicate boxes.