Figure 7.

The suppressed SA-mediated defense response accounts for the aphid susceptibility in GhLac1 RNAi lines. A, SA content of roots and young leaves of transgenic and wild-type plants under uninfected and cotton aphid-infected conditions. Values are the means ± sd; n = 9. B, qRT-PCR analysis of the expression levels of selected genes involved in the SA synthesis and signaling pathway in transgenic and wild-type plants after infection with cotton aphid. The values are normalized to GhUB7 and expressed as the means ± sd; n = 3. Statistical analyses were performed using Student’s t test. All experiments were repeated at least three times with similar results.