Physicochemical Traits of Younesi tangerine (Citrus reticulata) on Different Rootstocks

Document Type : Research Paper

Authors

1 Department of Horticulture, Roudehen Branch, Islamic Azad University, Roudehen, Iran

2 Phytochemistry Group, Department of Medicinal Plants & By-products, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran

3 Iran Citrus Research Institute, Ramsar, Iran

Abstract

The aim of this study was to determine organic acids and individual sugars in fruit of Younesi tangerine (Citrus reticulata) on different rootstocks.  On other hand, the purpose of this study was to identify the rootstock that could produce the highest amount of sugars. The content of individual sugars and organic acids in fruits were determined by HPLC. Total acidity (TA), total soluble solids (TSS) and pH value of juice was also evaluated. The results showed that, the highest of total sugars (126.94mg/ mL), pH (3.40), TSS (11.30%), TSS/TA (10.00) and juice (55.62%) were in fruit of Younesi tangerine (Citrus reticulata) grafting on the Orlando tangelo rootstock. According to results, the amount of citric acid (15.20mg/mL) of Younesi tangerine grafted on Flying Dragon was higher than those of other rootstocks. Among the sugars, sucrose was determined in the highest concentration in all investigated fruits. The results of correlation showed that there were a high positive correlation between the amount of TSS and sucrose. Results showed that Orlando tangelo rootstock had an important role in increasing of sugars, pH, TSS, as well as TSS/TA. Finally based on the obtained results it can be concluded that although the concentration of sugars and organic acids is strongly related to the genotype of fruit, it seems that rootstocks affect the amount of sugars and organic acids.

Keywords


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