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Chlorophyll fluorescence: assessing quality of stored apples.

Mir, N.; Wendorf, M.; Perez, R.; Beaudry, R. M.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 16 Pages: 50-56 Ref: 16 ref.

1997

บทคัดย่อ

Chlorophyll fluorescence: assessing quality of stored apples.

Fluorometry was evaluated for its ability to detect surface defects in apple fruits via changes in chlorophyll fluorescence. Defects included CO2 injury in Empire, bitter pit in Jonagold, superficial scald in Cortland, Law Rome, Gala and Red Delicious and bruising in Cortland fruits. Fruits with and without visible damage symptoms were selected and chlorophyll fluorescence, colour and surface contours were measured across the fruit surface. The fluorescence parameters, Fo, Fm and Fv/Fm (where Fv=Fm-Fo) were relatively similar around the circumference of the control fruits. Surface colour did not influence chlorophyll fluorescence. With the exception of bruises, there were marked changes in fluorescence in the areas where surface disorders or damage had developed. The intensification of scald symptoms could be anticipated with Fm measurements when fruits were held at 22 deg C for 4 days following air storage. Chlorophyll fluorescence appeared to be a promising tool for sorting fruits by defects.

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