Figure 3.
Gene expression analysis of five SbPAL genes (PAL1, PAL2, PAL3, PAL15, and PAL7) in controls and sugarcane aphid (SCA) infested shoot tissues from two sorghum lines (Tx7000, Tx2783). qRT-PCR was used to determine the relative expression of each SbPAL gene, and the relative expression was estimated using the 2−ΔΔCt method. Samples were collected at 6 hours post infestation (h), 12 h, 1 day post infestation (d) 2 d, 3 d, 6 d, and 9 d. Gene expression in control (none-infested) plants of each line is normalized to 1. Error bars represent standard error among replicates (n = 3) and the asterisks represent statistically significant changes between the controls and SCA infested samples as determined using Student’s t-test (p ≤ 0.05), while the bars without asterisk are non-significant (p > 0.05).