ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of postharvest desiccation at high temperature on soluble sugar changes of two supersweet sweet corn cultivars.

Aung, L. H.; Fouse, D. C.; Harris, C. M.;

Journal of Horticultural Science Year: 1992 Vol: 67 Issue: 6 Pages: 745-750 Ref: 24 ref.

1992

บทคัดย่อ

Caryopses were stripped from cobs of sweetcorn cultivars Supersweet Jubilee and Sweetie and placed in 2 types of polyethylene bags having CO2 transmission rates of 1973 ml m-2 h-1 and 2318 ml m-2 h-1, respectively. Moisture loss was compared for these caryopses in bags kept at 60 deg C in a forced draught oven with that from caryopses placed in open Petri dishes also dried at 60 deg . Caryopses reached a constant DW after 24 h of drying in open dishes. The sugar composition of dried caryopses was compared with that of caryopses left on plants growing in the field. Drying in the open at 60 deg increased the raffinose and fructose contents in both cultivars compared with field drying; sucrose content was reduced. In Supersweet Jubilee raffinose, sorbitol, fructose and glucose contents significantly increased in caryopses held in polyethylene bags at 60 deg compared with open drying at 60 deg . In Sweetie only fructose and glucose contents increased. It is concluded that high-temperature drying has a profound effect on soluble sugar contents of sweetcorn caryopses which may be associated with their cell membrane protecting role.