A. Gene transcript levels in susceptible (S) and resistant (R) goosegrass at the indicated times after paraquat treatment. Transcripts were detected by real-time PCR using total RNA extracted from 10-d-old seedlings sprayed with 10/HM paraquat. Error bars represent the SD (n = 3). B. Amplification products of 4 putative genes from goosegrass by RT-PCR. For the M:DL 2000 marker, “-” indicates the negative control. R0, R30, R60, R90, R120, and R180 indicate samples of R goosegrass seedlings taken 0, 30, 60, 90, 120 and 180 min after paraquat treatment, while S0, S30, S60, S90, S120 and S180 indicate samples of S goosegrass seedlings taken 0, 30, 60, 90, 120 and 180 min after paraquat treatment, respectively.</p