Respiration rates of sweet cherry cultivars at optimal and abusive temperatures over three growing seasons
Understanding the respiration rates of new cherry cultivars is useful for developing recommendations for packaging and handling of the fruit. Cultivars with similar respiration patterns can probably be packaged in the same films and handled similarly. If they diverge in their respiration response to different temperatures, then different films and/or more stringent handling regimes may be required. The respiration rates of 'Santina', CristalinaTM, Suite NoteTM, 'SPC 378', StardustTM, 'Skeena', 'Lapins', SweetheartTM and StaccatoTM sweet cherries were measured at 0, 5 and 10°C. The experiment was repeated for three years. When fruit were held at 0°C, respiration rates were similar for all cultivars and for all three years. At 5 or 10°C (abusive temperatures), respiration rates of the cultivars diverged. SweetheartTM and StaccatoTM cherries showed the smallest increases in respiration rate at 5 and 10°C, while 'Lapins' and 'Santina' showed the largest. Principal components analysis (PCA) was used to group cultivars with similar patterns of response. Most cultivars clustered together when respiration was measured at 0°C, except for CristalinaTM, 'Santina' and Suite NoteTM. SweetheartTM and StaccatoTM clustered together when measured at 5 and 10°C, suggesting that they can be packaged in similar films and handled similarly. 'Skeena' and StardustTM formed a second cluster. The remaining cultivars did not group consistently at 5 and 10°C, so determining recommendations for handling them during long term shipping may be complex. 'Lapins' and 'Santina' data were outliers on the PCA plot at 10°C, making them riskier candidates for shipping if there is any chance of temperature abuse. The respiration rate of 'Lapins' cherries at 10°C was also inconsistent from year to year.
Toivonen, P.M.A. and Hampson, C.R. (2017). Respiration rates of sweet cherry cultivars at optimal and abusive temperatures over three growing seasons. Acta Hortic. 1161, 575-580
sweet cherries, respiration, temperature abuse, phenotyping, Prunus avium