Fig. 6
The effects of PABA on the growth of FHB strains. A Suppression of the mycelia in vitro by PABA at 3 days. The rings marked on the plates indicate the edge of hyphal growth every 24 h. PDA and DMSO mean that the strain was cultured on the potato dextrose agar medium and the DMSO-amended potato dextrose agar medium, respectively. B Inhibition rate of the mycelial growth by PABA at 3 days. PDA and DMSO mean that the strain was cultured on the potato dextrose agar medium and the DMSO-amended potato dextrose agar medium, respectively. C Effect of PABA on conidia production at 48 h. MBB and DMSO mean that the strain was cultured on the mung bean broth medium and the DMSO-amended mung bean broth medium, respectively. D The percentage of scabbed spikelets of different cultivars after the application of exogenous PABA at 21 days post inoculation. H2O, DMSO and PABA represent the control groups sprayed with H2O or DMSO, and the experimental groups sprayed with PABA, respectively. E Exogenous spraying of PABA reduces FHB disease phenotype in wheat cultivars Huaimai33 and Lianmai7. H2O, DMSO and PABA represent the control groups sprayed with H2O or DMSO, and the experimental groups sprayed with PABA, respectively. The results are presented as the means ± SD. Asterisks indicate statistical significance. *** indicates P < 0.001, ** indicates P < 0.01, * indicates P < 0.05, ns indicates no significance (P > 0.05)