Diagnostic assay of internal breakdown susceptibility for peach and nectarine cultivars
J.P. Zoffoli, S. Balbontin, and C. Crisosto
Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. Abstract S09-P-143. pp. 258.
2002
บทคัดย่อ
Flesh breakdown associated with mealiness and flesh browning, is the main cause of peach and nectarine deterioration when stored at low temperature. A diagnostic assay of susceptibility to this problem at harvest is required in the stone fruit industry. Three cultivars of peaches (‘Elegant Lady’, ‘O’Henry’ and ‘Zee Lady’) and two of nectarines (‘August Red’, ‘Arctic Snow’) were selected. Electrolytic leaking, extracted juice and respiration rate of the fruit, weremeasured at harvest and correlated with the incidence of mealiness and flesh browning after 8, 18, 26 days storage at 0, 5 and 10 0C plus a period of ripening at 20 0C. A high correlation (r =-0,93) was obtained between extracted juice at harvest on ripe fruit and the incidence of mealiness after 18 and 26 days storage at 5 0C. Electrolytic leaking at harvest on unripe fruit was positively correlated (r= +0,86) with flesh browning symptoms after 26 days of storage at 0 0C and a period of ripening. The susceptibility of the cultivars at different temperatures of storage is discussed in term of mealiness of flesh browning incidence.