Jp. Fernandez-trujillo et al., Interactions among cooling, fungicide and postharvest ripening temperatureon peaches, INT J REFR, 23(6), 2000, pp. 457-465
Citations number
30
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Peach fruit (Prunus persica L. cv. 'Miraflores') harvested at the firm-ripe
stage, treated or not with 2 g l(-1) iprodione, were cooled or not at 1 de
grees C and ripened at 15 or 20 degrees C and 95% RH for 10 days. During ri
pening, weight loss, fungal development and changes in quality parameters (
firmness, soluble solids content, titratable acidity, pH and ground and fle
sh color), and carbon dioxide and ethylene production were monitored. Cooli
ng alone or combined with iprodione avoided Rhizopus nigricans decay during
ripening at either ripening temperatures. A skin damage not previously rep
orted on fungicide treated peach was observed at 20 degrees C. Cooled fruit
ripened at 15 degrees C showed an anomalous respiration rate and ethylene
production after the climacteric peak, a loss of firmness and a drop in tit
ratable acidity after 7 days of storage, and reduced endo-polygalacturonase
activity in presence of continuous pectinmethylesterase activity during th
e first week. Cooling before ripening at 20 degrees C led to the best flavo
r without excessive total losses. These results helped in the optimization
of warming cycles during cold storage used to avoid chilling injuries devel
opment on peaches. (C) 2000 Elsevier Science Ltd and IIR. All rights reserv
ed.