Low-temperature induction of ripening capacity in 'Comice' and 'Bosc' pears as influenced by fruit maturity
2009
Sugar, David | Basile, Sally R.
The relationship between fruit maturity at harvest and the duration of postharvest exposure to -1°C required to induce ripening capacity was studied in 'Comice' and 'Bosc' pears. As fruit of both cultivars were harvested progressively later, shorter durations of exposure to -1°C were required to induce ripening capacity. The relationship between the duration of conditioning at -1°C and the fruit flesh firmness after 7 d at 20°C was well-described by second-order polynomial equations. These equations were used to determine the number of days at -1°C required to induce ripening capacity for each harvest date. A linear relationship was observed between the number of days after fruit in the orchard reached maturity that fruit were harvested and the number of days of low-temperature conditioning needed to induce ripening capacity. This relationship may be used to predictively estimate the duration of low-temperature conditioning required to induce ripening based on harvest date.
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