In tomato,the main HAAs are ascorbic acid and phenolic compounds (Toor andSavage, 2006). The increase of HAA is associated with the accumula-tion of ascorbic acid and phenolic compounds. It has been reportedthat ascorbic acid contributes 28–38% to the HAA, while the rest is mainly due to phenolic compounds (Toor and Savage, 2005). In our study, small changes in both total phenolic content and ascorbicacid with relatively larger changes in HAA were observed.