บทคัดย่องานวิจัย

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Postharvest storage behaviour, respiration rate and ethylene evolution of fruit from deficit and normal irrigation in 'Mihowase satsuma' trees.

Peng, Y. H.; Rabe, E.;

Journal of the Southern African Society for Horticultural Sciences Year: 1997 Vol: 7 Issue: 2 Pages: 44-47 Ref: 14 ref.

1997

บทคัดย่อ

Postharvest storage behaviour, respiration rate and ethylene evolution of fruit from deficit and normal irrigation in 'Mihowase satsuma' trees.

Fruit storage quality, including colour, total soluble solids (TSS), titratable acidity (TA), TSS/TA ratio, juice content, decay percentage and overall appearance, and the physiological aspects (respiration and ethylene evolution) of Mihowase satsuma (Citrus unshiu) fruits from both normal and deficit irrigation regimes at Simondium, South Africa, were investigated over two seasons during simulated storage (4 weeks at 10 deg C followed by 8 weeks at ambient temperature). Compared with normal irrigation (NI), fruits from the deficit irrigation (DI) treatment proved to be commercially mature earlier, and had higher TSS and TA, similar TSS/TA ratios and juice percentages at the time of harvest. Each fruit quality parameter from both irrigation regimes showed similar postharvest patterns of change, i.e. the differences at time of harvest were maintained during the storage period. TA decreased consistently while TSS levels exhibited variable patterns during the period of storage for both irrigation t

reatments and over two seasons. No evident differences in fruit appearance between the two regimes were found. Fruits from both NI and DI treatments had very similar postharvest respiration and ethylene evolution patterns. Ethylene production peaked after about 8 weeks of storage for both treatments and in both seasons. The results of the overall fruit quality and internal physiological changes, suggest that fruit should be sold within about 8 weeks of picking to ensure optimum quality.