บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Harvest maturity related changes in antioxidant potential in Golden Smoothee apples.

Molina D., Recasens I., Alegre S., Larrigaudiere C.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.90

2004

บทคัดย่อ

Harvest maturity related changes in antioxidant potential in Golden Smoothee apples.  Changes in non-enzymatic antioxidant potential (DPPH, ascorbate content) and in enzymatic antioxidant potential (SOD, CAT and POX activity) were assessed in Golden Smoothee apples in relation to harvest date.Fruits were harvested each week at six different dates (from 18th August to 22nd September) and from two different orchards.Changes in antioxidants were related to changes in maturity indexes in orchard.The main interest of the study was to know if a delay in harvest date cause an increase in the level of active oxygen scavenging activity and what was the optimal harvest date to have a maximal antioxidant potential in order to improve the postharvest storage behaviors of the fruit.

Total antioxidant potential increased significantly with increasing maturity in orchard.In contrast, ascorbate levels remained stable during the first four weeks and decreased later the last two weeks.This opposite behaviour for ascorbate and total antioxidant potential showed that ascorbate alone is not the most important antioxidant compound in determining the total antioxidant potential of the fruit.Others compounds such as phenols are involved and it is likely the changes in the solubility of these compounds during o­n tree ripening which determine the apple total antioxidant potential.Changes in enzymatic antioxidant potential paralleled those of ascorbate, a result that showed the straight relationship existing between non-enzymatic and enzymatic antioxidant potential.