Fig. 6.

Impact of secondary metabolites produced by Alternaria and Fusarium fungi on bacterial gyrase. a The perylene-quinone derivatives ATX I (lanes 3–5), ATX II (lanes 6–8), ALP (lanes 9–11) and STTX III (lanes 12–14), b Alternaria metabolites ALN (lanes 2–4), PYR (lanes 8–10), ALS (lanes 11–13), MAC (lanes 14–16) and TEN (lanes 17–19). In c gels of FB1 (lanes 3–5), FC (lanes 6–8), MON (lanes 9–11) and DON (lanes 12–14) are depicted. Novobiocin (50 µM) was used as positive control