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Relative expression levels of genes NPR1 (A), Etr1 (B), PR1 (C), PR2 (D), and PR3 (E) in leaves of P. polymyxa WLY78, the fusA− mutant, and water treatment at days 1, 2. and 3. Accumulation of free salicylic acid (F) and conjugated salicylic acid (G) in roots was induced by fusaricidin. Different letters or asterisks indicate significant differences at p < 0.01, according to the Duncan multiple range test. Error bars indicate standard deviations among triplicates.
