บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The underlying biochemistry of the effect of modified atmosphere and storage temperature on firmness decrease in papaya.

Lazan, H.; Ali, Z. M.; Selamat, M. K.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 141-147 Ref: 7 ref.

1993

บทคัดย่อ

The underlying biochemistry of the effect of modified atmosphere and storage temperature on firmness decrease in papaya.

The mechanism by which modified atmosphere packaging (MAP) in heat-shrinkable film and storage at moderately low (15 deg C) temperature (MLT) retarded firmness loss in pawpaw (cv. Exotica) fruits was investigated. During storage, fruits were sampled to determine their texture and colour and for biochemical analysis (polygalacturonase, beta -galactosidase and pectin methylesterase [pectinesterase] activities). Rapid loss in firmness during fruit ripening at ambient temperature (25 deg ) was associated with an increase in enzymic activity as well as with depolymerization of cell wall pectins. MAP and MLT treatments delayed and retarded firmness loss. When fruits were stored at 15 deg , MAP was most effective in retarding texture change. Storage treatments also retarded the initial increase in enzymic activity during ripening and delayed depolymerization of the cell wall pectins. Colour development of fruits was more sensitive to storage temperature than to MAP treatment. The results suggest that the cell wall hydrolases may collectively play significant roles in the softening of pawpaw fruits.