Resistance of bHLH mutants and OE lines to the bacterial pathogen Pto DC3000.

<p>(A) Growth of <i>Pseudomonas syringae</i> pv. <i>tomato</i> (<i>Pto</i>) DC3000 on WT Arabidopsis plants, <i>jin1-2</i>, <i>coi1-1</i>, <i>bhlh003</i> and <i>bhlh017</i> mutants and OE lines for bHLH003, bHLH0013 and bHLH017 3 days after spray inoculation. Bacterial counts are expressed as log (cfu.cm⁻²). Error bars indicate SE. The results are representative of two independent experiments. Asterisks indicate statistically significant differences compared with WT (Student's t test: *, P<0.05; **, P<0.05; and ***, P<0.001). (B) Disease symptoms in leaves of WT, mutants and OE lines. Pictures of detached leaves were taken 4 days after inoculation.