Abstract
In this research, the effects of rootstocks on the storage performance of Nova mandarins grafted on Carrizo citrange, Troyer citrange, or sour orange grown in the ecological conditions of Dortyol were studied. Fruits were harvested at optimum maturity and kept at 4 °C and 6 °C for 120 days. Changes in weight loss, incidence of fungal decay and physiological disorders, juice content, total soluble solids (TSS), percent fruit with green button, titratable acidity (TA), juice pH, vitamin C content, and rind color (L*, C*, h°) were monitored at 15-day intervals during storage to determine the effects of rootstock on postharvest quality of Nova mandarins. The fruit of Nova mandarin grafted on sour orange and Carrizo citrange had higher weight loss than Troyer citrange. Weight loss from Nova mandarins kept at 4 °C and 6 °C reached 7.71% and 12.21%, respectively, after 120 days of storage. Juice pH, incidence of fungal decay, and physiological disorders increased, while juice content, TA, vitamin C content, percent fruit with green button, and L*, C*, and h° values of rind color decreased in the Nova mandarin cultivar during cold storage. According to the data, the fruits of Nova mandarin grafted on Carrizo citrange, Troyer citrange, or sour orange were stored better at 4 °C than 6 °C. Fruit could be kept at 4 °C for 75 days and at 6 °C for 45 days without any quality deterioration.
Highlights
Citrus is a major horticultural crop and commodity worldwide
Weight loss was higher in fruit from the Nova mandarin cultivar grafted on sour orange (9.77%) and Carrizo citrange (9.66%) than in fruit grafted on Troyer citrange (8.96%)
Fruit juice content was higher in fruit from the Nova mandarin cultivar grafted on Carrizo citrange (53.87%) than in fruit grafted on Troyer citrange (52.41%) and sour orange (52.20%)
Summary
Citrus is a major horticultural crop and commodity worldwide. Citrus species are some of the most important fruit groups for Turkey in terms of production and export quantity. The success of citrus production depends on the availability of suitable rootstocks. Many growers planted sour orange rootstock in Mediterranean regions, including Turkey. This rootstock is very sensitive to the tristeza virus (Demirkeser et al, 2009; Kurt et al, 2014); there is a need to evaluate other rootstocks. Kaplankıran et al (2001) and Demirkeser et al (2011) suggested the use of Carrizo citrange as rootstock for citrus, except for lemons, in the Aegean and Eastern Mediterranean regions This rootstock is very sensitive to the tristeza virus (Demirkeser et al, 2009; Kurt et al, 2014); there is a need to evaluate other rootstocks. Kaplankıran et al (2001) and Demirkeser et al (2011) suggested the use of Carrizo citrange as rootstock for citrus, except for lemons, in the Aegean and Eastern Mediterranean regions
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