บทคัดย่องานวิจัย

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Temperature physically affects apple texture.

Johnston, J. W., Hewett, E. W., Banks, N. H. and Harker, F. R.

ISHS Acta Horticulturae 553: 2001. pp. 207-210.

2001

บทคัดย่อ

Temperature physically affects apple texture.

The physical effect of temperature and time in storage on firmness of apple fruits was investigated. Apple cultivars Royal Gala (RG), Cox's Orange Pippin (COP), Granny Smith (GS) and Pacific Rose (PR) were placed in air at 0 deg C (3 deg C for COP) 24 h after harvest. At 10-20-day intervals fruits from each cultivar were measured for firmness and cortical tensile strength at storage temperature (f1), after warming from storage temperature to 20 deg C (f2), and after warming from storage temperature to 20 deg C and cooling back to storage temperature (f3). GS fruit at harvest were approx equal to 5N firmer when measured at 20 deg C than at 0 deg C, an effect not seen in tensile tests. After 80-100 days the reverse occurred, where firmness and tensile strength were greater when measured at 0 deg C than at 20 deg C. The interaction between physical effect of temperature and time was similar for all cultivars except PR, which was not firmer at colder temperatures after prolonged storage. Quantifying  the physical effect of temperature with storage time allowed development of a table depicting firmness change associated with changing fruit temperature, which could be used to compare firmness readings from fruit measured at one temperature to an equivalent firmness reading at another temperature.