In sapodilla, ascorbic acid was more effectively to delay the browning symptom for fresh-cut sample than on whole fruits

The effect of ascorbic acid on browning symptom in sapodilla fruit was investigated. Sapodilla cv. Makok at brownish-green skin color was harvested and divided into two treatment sets; whole fruits and fresh-cut fruits. All samples were dipped in 2, 4 and 6% ascorbic acid or water (control) for 5 min then stored at 15?C for 6 days. Browning development, skin and fresh color, weight loss, fruit firmness, total soluble solids content and the activities of polyphenol oxidase (PPO) and peroxidase (POD) were recorded. Whole fruits dipped in ascorbic acid could effectively delay the change in skin color and activities of PPO and POD. These treatments affected the change in total soluble solids content; with increase slightly less than for the control treatment. The high positive correlation between browning symptoms and color scale (L*, a*, b*), hue angle,PPO and POD activities were found with the R2 of about 0.84, 0.73, 0.88, 0.83, 0.88 and 0.886, respectively. In fresh-cut fruits, ascorbic acid could delay the development of fresh cut browning, percentage of weight loss and fresh firmness. The activity of PPO and POD were low and significantly different from control treatment. The degree of browning symptoms was highly positive correlation with the change in L*, a* value, hue angle, PPO and POD activities with the R2 of about 0.80, 0.88, 0.92, 0.89 and 0.85, respectively. The effect of ascorbic acid on changes in fruit physiological and quality parameters of whole fruits were evaluated in comparison to fresh-cut fruits. Application of ascorbic acid was more effectively delay the browning symptom for fresh-cut sample than on whole fruits. Original title, authors and sourceThe effect of ascorbic acid on browning symptom in whole and fresh-cut sapodilla (Achras sapota Linn.) fruit during storageL. Khurnpoon, W. PromtabDepartment of Plant Production Technology, Faculty of Agricultural Technology, King Mongkut?s Institute of Technology Ladkrabang, Bangkok 10520, ThailandV Postharvest Unlimited, ISHS International Conference, 10-13 June 2014, Cyprus, http://web.cut.ac.cy/postharvest/The picture is by vegaproduce.com