Fig. 4.
Expression of respiratory burst oxidase homolog genes. Relative transcript levels of RBOH1 (A and B), RBOH2 (C and D), and RBOH3 (E and F) in the root tissue waterlogged for 1, 7, 14, and 28 d (A, C, and E) and stem node tissue waterlogged for 7, 14, and 28 d (B, D, and F), and their respective controls. Transcript levels of each gene in both tissues were determined as described in Fig. 3, and are expressed relative to the transcript level of RBOH1 in control roots at 1 d after the start of waterlogging, which was arbitrarily set a value of 1. Other data descriptions are as indicated in Fig. 3.