Fig. 5. In planta application of small molecules confer tolerance to Candidatus Liberibacter spp. in potatoes.

a Visual symptoms of plants at 28 days post infection (dpi). Tetracycline (TC, 250 ppm) and three selected small molecules (#3, #8, and #9; see Fig. 4) were sprayed on the plants at two concentrations (10 and 25 µM) as indicated. Disease symptoms of chlorosis, necrosis, leaf curling, and wilting were monitored. b CLso titers were determined by qPCR at 28 dpi. All titers are plotted relative to those of untreated samples, which were set to 100%. Error bars represent ± standard error of mean (n = 4). p Values were calculated by two-sample t test (one-tailed) relative to untreated samples. Source data underlying Fig. 5b are provided as a Source Data file.