บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Physiology and electron microscopy of the withered juice sac of ponkan (Citrus reticulata) during storage.

Wang, S.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 45-49 Ref: 5 ref.

1993

บทคัดย่อ

Physiology and electron microscopy of the withered juice sac of ponkan (Citrus reticulata) during storage.

The aims of this study were to investigate the causes and mechanisms of the storage disorder Withered Juice Sac (WJS) in Ponkan mandarins. Different stages of WJS-affected and healthy fruits were analysed for soluble solids, titratable acidity, ascorbic acid and changes in rind:pulp ratios after 4 and 5 months of storage. Specimens from different stages of WJS-affected fruits were examined using transmission electron microscopy. Fruits harvested at 80-90% maturity were treated with gibberellic acid 3 weeks before harvest (10 p.p.m. GA3) or after harvest (40 p.p.m. GA3). Fruits were then prestored at ambient temperature for 10-15 days before being packaged in polyethylene packs and stored [temperature unspecified]. With the development of WJS, soluble solids, titratable acidity and ascorbic acid contents of the pulp decreased and soluble solids content of the rind decreased. Sweetness and flavour were also found to decrease. Puffing developed and the rind:pulp ratio increased showing that the rind grew during the development of WJS. Translocation of water and nutrients into the rind from the pulp were the main reasons for WJS development. Prestorage and GA3 treatment before or after decreased and delayed development of the disorder.