Fig. 5From: Humic acids trigger the weak acids stress response in maize seedlingsThe fluorescence of BCECF probe (2,7-bis(2-carboxyethyl)-5(and 6)-carboxyfluorescein) in maize root tips growth at pH 5.8. a Control; b humic acids at 8 mM C L−1 and C at 16 mM C L−1. d 0.4 mM acetic acid; e 4 mM acetic acid; f 0.4 mM salicylic acid; g 1.2 mM salicylic acidBack to article page