Figure 1.

Skotomorphogenic Traits Are Regulated by Oxygen Sensing in Flowering Plants

(A) Images of final apical hook angle of etiolated seedlings of Arabidopsis thaliana, Papaver somniferum, and Nicotiana benthamiana in normoxia or hypoxia (168 hr, 168 hr, and 144 hr in the dark, respectively). Hypoxia treatment was continuously applied following initiation of the hook maintenance phase.

(B) Response of the apical hook after transfer from hypoxia (A) to normoxia for the indicated times.

(C) Response of the apical hook angle of Arabidopsis to increasing oxygen levels.

(D) Images of cotyledon greening of seedlings following transfer to light under normoxia or hypoxia (24 hr).

Error bars indicate SD from the mean.