Fig. 5.

Effects of different treatment combinations on the antioxidant and phenolic metabolism enzyme activities of cherry tomato. (A) Polyphenolic content, (B) Antioxidant activity, (C) Phenylalanine ammonia-lyase, and (D) 4-coumarate-CoA ligase. Lowercase and uppercase letters above the column indicate significant differences between different treatments within the same day and between different days within same treatment, respectively. US, ultrasound; TW, tap water; FC, free chlorine; CD, chlorine dioxide; PAA, peracetic acid; AA, ascorbic acid.