Fig. 4

The expression of differentially expressed miRNAs verified by stem-loop qRT-PCR. Except miR160a and miR399, all others are down-regulated in hypoxia-treated wild tomato compared to control wild tomato roots (CK). U6 served as internal control. Asterisks indicate statistically significant differences compared with control by Student’s t test (*P < 0.05; **P < 0.01)