The Effect of Rootstocks on the Sugars, Acids, Carotenoids, Chlorophylls and Ethylene Content of Kumquat (Fortunella Margarita)

Document Type : Research Paper

Authors

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

2 Department of Medicinal Plants & By-products, Research Institute of Forest and Rangelands, P.O. Box 1318, Tehran, IRAN

Abstract

Investigations have demonstrated that ratio of sugars to organic acids affects the particular taste of citrus fruit. Carotenoids are also known to reduce cancers, cataracts, and heart disease. It seems that some rootstocks enhance the ripening of fruits and stimulate the biosynthesis of sugars and carotenoids. The aim of this study was to evaluate the effect of rootstocks on sugars, organic acids and carotenoids of fruit. 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. Total carotenoids and chlorophylls content was measured using a spectrophotometer. The content of ethylene in fruits was determined by Gas chromatograph. HPLC analysis of juice allowed to detection of 3 sugars and 2 acids. Sucrose was the dominant sugar for all rootstocks. The experimental design was completely randomized design with three replicates. The amount of total sugars ranged from 46.22 (mg/mL) (Sour orange) to 51.63 (mg/mL) (Troyer citrange). The amount of total acids changed from 44.06 (mg/mL) (Troyer citrange) to 45.48 (mg/mL) (Sour orange). Among the three rootstocks evaluated, Troyer citrange demonstrated the maximum rate of sugars, pH, TSS and TSS/TA. The highest content of citric acid, ascorbic acid, juice and carotenoids were produced by Sour orange. As an outcome of our investigation, we can express that the rootstocks can affect the amount of sugars, acids and carotenoids of fruits

Keywords

Journal of Medicinal plants and By-product

Articles in Press, Accepted Manuscript
Available Online from 25 May 2023

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