Figure 1.

Physiological responses under drought stress of rice seedlings grown in soil. Rice cultivar Chilbo grown in plastic pots for 4 weeks was exposed to water deficiency (WD) for 1 (A), 2 (B), 3 (C), or 4 (D) d and then recovered for 7-d (E–H). Effects of WD were checked by monitoring expression patterns of drought-stress marker genes (I,J). Y-axis indicates expression level relative to OsUBI5/Os01g22490 (internal control); x-axis, samples used for qRT-PCR (J). C1, C2, C3, and C4, untreated control (roots from well-watered pots) corresponding to plants under 1 d of water deficiency (WD1d), 2 d (WD2d), 3 d (WD3d), and 4 d (WD4d). ^**P < 0.01; ^***P < 0.001. Scale bar = 10 cm. N = 3.