Fig. 1
HN09 metabolites induce resistance in A. thaliana. Induction of systemic resistance to Pseudomonas syringae pv. tomato DC3000 in A. thaliana Col-0 plants treated with HN09 and its fermentation broth. A. thaliana Col-0 plants were treated with HN09 bacteria cells (HN09-C), HN09 fermentation broth at OD600 = 0.1 (HN09-FB), supernatant of HN09 fermentation broth (HN09-S) and 10 mM MgSO4 (CK). Five days later, leaves were sprayed with a cell suspension of DC3000 at OD600 = 0.02. (a) Representative plants of HN09-C, HN09-S and HN09-FB were photographed 5 days post inoculation (dpi). (b) Colony density of DC3000 in the leaves of A. thaliana plants of different treatment groups. Values are the average CFU per gram of leaf; each treatment had 12 plants, and 3 leaves per plant were obtained for quantification of DC3000 density (least significant difference test; P < 0.05). All experiments were conducted twice with similar results