Abstract
The effects of preharvest calcium chloride (CaCl2) treatment on some quality characteristics and bioactive compounds of sweet cherry fruit (Prunus avium L. cvs. 0900 Ziraat, Sweetheart and Merton Late) were investigated. The CaCl2 (1%) solution was sprayed to the cherry trees at 21 and 35 days after full bloom stage. The trees served as control were treated with distilled water at the same days. CaCl2 treatment remarkably suppressed the respiration rate and increased titratable acidity and fruit firmness of cherries. Treated fruit had more attractive skin colour with higher h° and L* values compared to control. The individual soluble sugars and total sugar contents of CaCl2 treated cherries were lower than those of control fruit. The accumulation of ascorbic acid, stem chlorophyll, total phenolics and anthocyanin contents of fruit were delayed by CaCl2 treatment in all varieties. The antioxidant activities of all treated varieties were lower than those of control fruit. Based on these results, it can be set forth that preharvest CaCl2 treatment suppressed ripening processes including respiration rate and maintained firmness and titratable acidity of cherries by maintaining cell integrity in all varieties during the fruit development period.
Highlights
In recent years, sweet cherry (Prunus avium L.) has become one of the most attractive fruit for producers in the world because of its increasing economic value (Winkler & Knoche 2019)
Sweet cherries that contain insufficient Ca are susceptible to some quality losses related to fruit firmness (Dong et al 2019)
These findings reveal that detailed information about the effects of preharvest Ca treatments on the quality of sweet cherries is urgently needed
Summary
Received: February 2021; Received in Revised Form: October 2021, Accepted: 5 October 2021. This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.
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