Phenolic compounds were extracted and quantified according
to the method by Babic and others (1993a) with some modifications. Five grams of carrot tissue were homogenized in 20 mL of
70% aqueous methanol and 0.5% sodium bisulfate. The homogenate
was settled for 1 h, filtered, and centrifuged at 12000 × g at 4 ◦C for
15 min