Longkong (Aglaia dookkoo Griff.) belongs to the Meliaceae family
and originates from southern Thailand. The fruit deteriorates
rapidly after harvest due to pericarp browning. The postharvest
browning of fruit and vegetables is primarily attributed to the oxidation
of phenolic compounds by polyphenol oxidase (PPO) and/or
peroxidase (POD) (Jiang and Li, 2001). For longkong fruit, phenolic
compounds, as well as PAL and PPO activities, are likely involved in
the development of browning after harvest. Browning occurs more
markedly in the middle portion of the fruit than in the upper and
lower parts